- [The macroArray package](#macroarray)
- [Content description](#content-description)
  * [`%appendArray()` macro](#appendarray-macro)
  * [`%appendCell()` macro](#appendcell-macro)
  * [`%array()` macro](#array-macro)
  * [`%concatArrays()` macro](#concatarrays-macro)
  * [`%deleteMacArray()` macro](#deletemacarray-macro)
  * [`%do_over()` macro](#do-over-macro)
  * [`%do_over2()` macro](#do-over2-macro)
  * [`%do_over3()` macro](#do-over3-macro)
  * [`%make_do_over()` macro](#make-do-over-macro)
  * [`%mcHashTable()` macro](#mchashtable-macro)
  * [`%mcDictionary()` macro](#mcdictionary-macro)
  * [`%QzipArrays()` macro](#qziparrays-macro)
  * [`%zipArrays()` macro](#ziparrays-macro)
  * [`%sortMacroArray()` macro](#sortmacroarray-macro)
  
  * [License](#license)

---

# The macroArray package [ver. 1.1.1] <a name="macroarray-package"></a> ###############################################

The **macroArray** package implements a macro array facility:
- `%array()`,
- `%do_over()`,
- `%make_do_over()`,
- `%deletemacarray()`,
- `%concatarrays()`,
- `%appendcell()`,
- `%mcHashTable()`,
- `%zipArrays()`,
- `%sortMacroArray()`,
- `%mcDictionary()`,
- etc.

The set of macros, which emulates classic
data-step-array functionality on the macro
programming level, is provided.

*Note:*
If you are working with BIG macroarrays do not 
forget to verify your session setting for macro 
memory limits. Run:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  proc options group = macro;
  run;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
to verify the following options: 

| option       | description                                                                                    |
|-------------:|:-----------------------------------------------------------------------------------------------|
|`MEXECSIZE=`  | specifies the maximum macro size that can be executed in memory.                               |
|`MSYMTABMAX=` | specifies the maximum amount of memory available to the macro variable symbol table or tables. |
|`MVARSIZE=`   | specifies the maximum size for a macro variable that is stored in memory.                      |

---

Package contains: 
  1.   macro      appendarray 
  2.   macro      appendcell 
  3.   macro      array 
  4.   macro      concatarrays 
  5.   macro      deletemacarray 
  6.   macro      do_over 
  7.   macro      do_over2 
  8.   macro      do_over3 
  9.   macro      make_do_over 
  10.  macro      mcdictionary 
  11.  macro      mchashtable 
  12.  macro      qziparrays 
  13.  macro      sortmacroarray 
  14.  macro      ziparrays 

Required SAS Components: 
  *Base SAS Software*

*SAS package generated by generatePackage, version 20230904*

The SHA256 hash digest for package macroArray: 
`F*E9C0C58FB36AC40C76A518066B8C6F9942202A9DB2C2D737E95D2BB6E4ECED50`

---
# Content description ############################################################################################
 
## >>> `%appendArray()` macro: <<< <a name="appendarray-macro"></a> ############

The `%appendArray()` macro is a macrowrapper
which allows to concatenate two macroarrays 
created by `%array()` macro.

By default values of the second macroarray are *not* removed.

Dimensions of the first macroarray are extended.

The `%appendArray()` macro executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%appendArray(
  first
 ,second
) 
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `first` -  *Required*, a name of a macroarray created by the `%array()` macro.

2. `second` - *Required*, a name of a macroarray created by the `%array()` macro.




### EXAMPLES AND USECASES: ######################################################

**EXAMPLE 1.** Append macroarrays LL and MM.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(ll[2:4] $ 12,
    function = quote(put(today() + 10*_I_, yymmdd10.)),
    macarray=Y
  )
  %array(mm[10:13] $ 1200,
    function = quote(repeat("A",12*_I_)),
    macarray=Y
  )
  %put *%ll(2)*%ll(3)*%ll(4)*;

  %appendArray(ll, mm); 
  %put *%ll(2)*%ll(3)*%ll(4)*%ll(5)*%ll(6)**%ll(7)*%ll(8)*;

  %put *%mm(10)**%mm(11)*%mm(12)*%mm(13)*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Error handling.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %appendArray(ll, )
  %appendArray(, mm)

  %appendArray(noExistA, noExistB)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---


 
## >>> `%appendCell()` macro: <<< <a name="appendcell-macro"></a> ##############

The `%appendCell()` macro allows to append
a macrovariable to a macroarray created by the `%array()` macro.

Dimensions of the macroarray are extended.

The `%appendCell()` macro executes like a pure macro code.

### SYNTAX: ####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%appendCell(
  first
 ,second
 ,hilo
) 
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `first` -  *Required*, a name of a macroarray created by the `%array()` macro.

2. `second` - *Required*, a name of a macrovariable to be append to the macroarray.

3. `hilo` -   *Required*, if `H` macrovariable is appended at the end 
                          if `L` macrovariable is appended at the beginning 
);



### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Create two macro wrappers.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %* Macro wrapper to append a macrovariable to the end of a macroarray;
  %macro appendHC(array,cell);
    %appendCell(&array.,&cell.,H)
  %mend appendHC;

  %* macro wrapper to append a macrovariable to the beginning of a macroarray;
  %macro appendLC(array,cell);
    %appendCell(&array.,&cell.,L)
  %mend appendLC;


  %* create macroarrays X and variables W,Y,Z;

  %array(X[2:4] $ ("AAA", "BBB", "CCC"), macarray=Y)
  %let W=1;
  %let Y=2;
  %let Z=3;
  %put *%do_over(X)*&=W*&=Y*&=Z*;

  %put BEFORE *%do_over(X)**&=xLBOUND*&=xHBOUND*&=xN*;
  %appendCell(X,Y,H)
  %put AFTER1 *%do_over(X)**&=xLBOUND*&=xHBOUND*&=xN*;

  %appendLC(X,W)
  %put AFTER2 *%do_over(X)**&=xLBOUND*&=xHBOUND*&=xN*;

  %appendHC(X,Z)
  %put AFTER3 *%do_over(X)**&=xLBOUND*&=xHBOUND*&=xN*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Error handling
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %appendCell(X,Y,blahblah)

  %appendCell(X,,H)
  %appendCell(,Y,H)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**EXAMPLE 3.** Adding variable below lower bound.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(zero[0:2] $ ("AAA", "BBB", "CCC"), macarray=Y)
  %let belowzero=zzz;

  %put BEFORE *%do_over(zero)**&=zeroLBOUND*&=zeroHBOUND*&=zeroN*;
  %appendCell(zero,belowzero,L)
  %put AFTER  *%do_over(zero)**&=zeroLBOUND*&=zeroHBOUND*&=zeroN*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---



## >>> `%array()` macro: <<< <a name="array-macro"></a> #######################

The code of a macro was inspired by 
*Ted Clay's* and *David Katz's* macro `%array()`. 

The `%array()` macro version provided in the package 
is designed to facilitate 
the idea of macro array concept, i.e. *a list of 
macrovariables with common prefix and numerical suffixes*.
Usually such construction is then resolved by 
double ampersand syntax, e.g. `&&perfix&i` or similar one.

What is new/extension to the `%array()` macro concept are:

0. The syntax is closer to the data step one.
1. It is a pure macro code (it can be executed in any place 
   of 4GL code), this includes generating macro arrays out 
   of datasets. 
2. When a macroarrray is created it allows also to generate
   a new macro (named the same as the array name) and replace 
   the double ampersand syntax with more array looking one,
   i.e. for array ABC user can have `%ABC(1)`, `%ABC(2)`, or `%ABC(&i)`
   constructions.
3. The array macro allows to use data step functions to generate 
   array's entries.

The `%array()` macro executes like a pure macro code.

### SYNTAX: ###################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%array(
   array
  <,function=>
  <,before=>
  <,after=>
  <,vnames=N>
  <,macarray=N>
  <,ds=>
  <,vars=>
  <,q=>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `array` -      *Required*, an array name and a declaration/definition of an array, <br>
                  e.g. `myArr[*] x1-x3 (4:6)` <br>
                    or `myBrr[*] $ y1-y3 ("a" "b" "c")` <br>
                    or `myCrr[3] $ ("d d d" "e,e,e" "f;f;f")` <br>
                    or `myDrr p q r s`. <br>
                  Macrovariables created by the macro are *global*.
                  If an array name is `_` (single underscore) then attached variables 
                  list names are used, a call of the form: 
                    `%array(_[*] p1 q2 r3 s4 (-1 -2 -3 -4))` 
                  will create macrovariables: `p1`, `q2`, `r3`, and `s4` with respective 
                  values: `-1`, `-2`, `-3`, and `-4`. <br>
                  Three additional *global* macrovariables: 
                    `<arrayName>LBOUND`, `<arrayName>HBOUND`, and `<arrayName>N` 
                  are generated with the macroarray. See examples for more use-cases.

* `function=` -   *Optional*, a function or an expression to be applied to all array cells, 
                  `_I_` is as array iterator, e.g. `_I_ + rand("uniform")`.

* `before=` -     *Optional*, a function or an expression to be added before looping through 
                  array, e.g. `call streaminit(123)`.

* `after=` -      *Optional*, a function or an expression to be added after looping through 
                  array, e.g. `call sortn(ABC)`.

* `vnames=N` -    *Optional*, default value `N`, if set to `Y`/`YES` then macroarray is built based 
                  on variables names instead values, e.g. 
                    `%array(myArr[*] x1-x3 (4:6), vnames=Y)`
                  will use `x1`, `x2`, and `x3` as values instead `4`, `5`, and `6`.

* `macarray=N` -  *Optional*, default value `N`, if set to `Y`/`YES` then a macro, named with the array 
                  name, is compiled to create convenient envelope for multiple ampersands, e.g. 
                    `%array(myArr[*] x1-x3 (4:6), macarray=Y)` 
                  will create `%myArr(J)` macro which will allow to extract "data" 
                  from macroarray like: 
                    `%let x = %myArr(1);` 
                  or when used with second parameter equal `I` (insert) allow to overwrite macroarrays 
                  value: 
                    `%let %myArr(17,i) = 42;`
                  If set to `M` then for a given array name the macro symbols table is scanned for
                  macrovariables with prefix like the array name and numeric suffixes, 
                  then the minimum and the maximum index is determined
                  and all not existing global macrovariables are created and
                  a macro is generated in the same way as for the `Y` value.

* `ds=` -        *Optional*, use a dataset as a basis for a macroarray data, 
                 if used by default overwrites use of the `array` parameter, honors `macarray=` 
                 argument, dataset options are allowed, e.g. `sashelp.class(obs=5)`

* `vars=` -      *Optional*, a list of variables used to create macroarrays from a dataset, 
                 the list format can be as follows (`<...>` means optional):
                   `variable1<delimiter><arrayname1> <... variableN<delimiter><arraynameN>>`
                 delimiters are hash(`#`) and pipe(`|`), currently only space 
                 is supported as separator, the meaning of `#` and `|` delimiters 
                 will be explained in the following example: 
                 if the `vars = height#h weight weight|w age|` value is provided
                 then the following macroarrays will be created: <br>
                  1) macroarray "H" with ALL(`#`) values of variable "height"  <br>
                  2) macroarray "WEIGHT" with ALL(no separator is equivalent to #) 
                     values of variable "weight" <br>
                  3) macroarray "W" with UNIQUE(|) values of variable "weight" and <br>
                  4) macroarray "AGE" with UNIQUE(|) values of variable "age".

* `q=` -        *Optional*, indicates (when set to `1`) if the value be surrounded by quotes.
                It uses `quote(cats(...))` combo under the hood. Default value is `0`.
                Ignored for `macarray=M`.


---
 
### EXAMPLES AND USECASES: ####################################################


**EXAMPLE 1.** Basic use-case. 
    Creating macroarray like in the array statement.
    Values not variables names are used by default.
    Different types of brackets are allowed.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(a[*] x1-x5 (1:5))

  %array(b{5} (5*17), q=1)

  %* Mind the $ since it is a character array!;
  %array(c(3) $ 10 ("a A" "b,B" "c;C"))

  %array(d x1-x5 (5 4 3 2 1))
  %put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Index ranges.
    If range starts < 0 then it is shifted to 0.
    In case when range is from `1` to `M`
    then macrovariable `<arrayname>N` is set to `M`
    In case when range is different
    the `<arrayname>N` returns number of 
    elements in the array `(Hbound - Lbound + 1)`.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(d[-2:2] $ ("a" "b" "c" "d" "e"))
  %put &=dLBOUND. &=dHBOUND. &=dN.; 
  %put &=d0. &=d1. &=d2. &=d3. &=d4.;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 3.** Functions.
   It is possible to assign value of a function
   or an expression to a cell of the array, 
   e.g. `array[_I_] = function(...)`.
   You can use an iterator in a function.
   As in case of usual arrays it is `_I_`. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(e[-3:3] $, function = "A" ) 
  %put &=eLBOUND. &=eHBOUND. &=eN.; 
  %put &=e0. &=e1. &=e2. &=e3. &=e4. &=e5. &=e6.;

  %array(f[-3:3], function = (2**_I_) ) 
  %put &=fLBOUND. &=fHBOUND. &=fN.;
  %put &=f0. &=f1. &=f2. &=f3. &=f4. &=f5. &=f6.;

  %array(g[0:2], function = ranuni(123) )
  %put &=gLBOUND. &=gHBOUND. &=gN.;
  %put &=g0. &=g1. &=g2.; 

  %* Or something more complex;
  %array(gg[0:11] $ 11, function = put(intnx("MONTH", '1jun2018'd, _I_, "E"), yymmn.), q=1)
  %put &=ggLBOUND. &=ggHBOUND. &=ggN.;
  %put &=gg0 &=gg1 &=gg2 ... &=gg11;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 4.** Functions cont.
    If there is need for set-up something *before* or *after*:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(h[10:12]
        ,function = rand('Uniform')
        ,before = call streaminit(123) 
        ,after = call sortn(of h[*])
        ) 
  %put &=h10. &=h11. &=h12.; 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 5.** Fibonacci series. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(i[1:10] (10*0)
        ,function = ifn(_I_ < 2, 1, sum(i[max(_I_-2,1)], i[max(_I_-1,2)]) ) )
  %put &=i1 &=i2 &=i3 &=i4 &=i5 &=i6 &=i7 &=i8 &=i9 &=i10;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 6a.** Quoted "Uppercas Letters"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(UL[26] $, function = byte(rank("A")+_I_-1) , q=1)
  %put &=UL1 &=UL2 ... &=UL25 &=UL26;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 6b.** "Lowercase Letters" 
    Extended by `macarray=Y` option and
    the input mode support (with `I`).

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(ll[26] $, function = byte(rank("a")+_I_-1), macarray=Y) 
  %put *%ll(&llLBOUND.)*%ll(3)*%ll(4)*%ll(5)*...*%ll(25)*%ll(&llHBOUND.)*;

  %* The range handling, warning;
  %put *%ll(265)*;
 
  %* The input mode; 
  %put *before:*%ll(2)*;
  %let %ll(2,I) = bbbbb;
  %put *after: *%ll(2)*;

  %* The range handling, error;
  %let %ll(265,I) = bbb;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 7.** The use of `vnames=Y`

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(R R1978-R1982)
  %put &=R1 &=R2 &=R3 &=R4 &=R5;

  %array(R R1978-R1982 (78:82))
  %put &=R1 &=R2 &=R3 &=R4 &=R5;

  %array(R R1978-R1982 (78:82), vnames=Y)
  %put &=R1 &=R2 &=R3 &=R4 &=R5;

  %array(R R1978-R1982, vnames=Y)
  %put &=R1 &=R2 &=R3 &=R4 &=R5;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 8.** A "no name" array i.e. the `_[*]` array 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(_[*] x1-x5 (1:5))
  %put _user_;

  %array(_[*] p q r s (4*42))
  %put _user_;

  %* If no variables names than use _1 _2 ... _N;
  %array(_[4] (-1 -2 -3 -4)) 
  %put &=_1 &=_2 &=_3 &=_4;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 9.** Pure macro code can be used in a data step.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  data test1;
    set sashelp.class;
    %array(ds[*] d1-d4 (4*17))
    a1 = &ds1.;
    a2 = &ds2.;
    a3 = &ds3.;
    a4 = &ds4.;
  run;

  data test2;
    set sashelp.class;
    %array(_[*] j k l m (4*17))
    a1 = &j.;
    a2 = &k.;
    a3 = &l.;
    a4 = &m.;
  run;

  data test3;
    set sashelp.class;
    %array(alpha[*] j k l m (101 102 103 104), macarray=Y)
    a1 = %alpha(1);
    a2 = %alpha(2);
    a3 = %alpha(3);
    a4 = %alpha(4);
    a5 = %alpha(555);
  run;

  data test4;
    set sashelp.class;
    %array(beta[*] j k l m (101 102 103 104), vnames=Y, macarray=Y)
    a1 = "%beta(1)";
    a2 = "%beta(2)";
    a3 = "%beta(3)";
    a4 = "%beta(4)";
    a5 = "%beta(555)";
  run;

  data test5;
    set sashelp.class;
    %array(gamma[4] $ 12 ("101" "102" "103" "104"), macarray=Y)
    a1 = "%gamma(1)";
    a2 = "%gamma(2)";
    a3 = "%gamma(3)";
    a4 = "%gamma(4)";
    a5 = "%gamma(555)";
  run;

  data test6;
    set sashelp.class;
    %array(ds = sashelp.cars, vars = Cylinders|, macarray=Y)
    a0 = %Cylinders(0);
    a1 = %Cylinders(1);
    a2 = %Cylinders(2);
    a3 = %Cylinders(3);
    a4 = %Cylinders(4);
    a5 = %Cylinders(555);
  run;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 10.** Creating an array from a dataset, basic case.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(ds = sashelp.class, vars = height weight age)
  %put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 11. Creating an array from a dataset, advanced.
    If: `vars = height#h weight weight|w age|`
    then create:
    1. macroarray "h" with ALL(#) values of variable "height"
    2. macroarray "weight" with ALL(no separator is equivalent to #) values of variable "weight"
    3. macroarray "w" with UNIQUE(|) values of variable "weight"
    4. macroarray "age" with UNIQUE(|) values of variable "age"
    Currently the only separator in VARS is a space.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(ds = sashelp.class, vars = height#h weight weight|w age|, q=1)
  %put _user_;

  %array(ds = sashelp.class, vars = height#hght weight weight|wght age|, macarray=Y, q=1)
  %put *%hght(&hghtLBOUND.)**%weight(2)**%wght(&wghtHBOUND.)**%age(3)*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 12.** Creating an array from a dataset with dataset options 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(ds = sashelp.cars(obs=100 where=(Cylinders=6)), vars = Make| Type| Model, macarray=Y)
  %put *%make(&makeLBOUND.)*%Model(2)*%Model(3)*%Model(4)*%type(&typeHBOUND.)*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 13.** Creating an array and macro from existing list of macrovariables 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %let myTest3 = 13;
  %let myTest6 = 16;
  %let myTest9 = 19;
  
  %array(myTest, macarray=M, q=1)
  %do_over(myTest, phrase = %nrstr(%put *&_I_.*%myTest(&_I_.)*;))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---


 
## >>> `%concatArrays()` macro: <<< <a name="concatarrays-macro"></a> ###########

The `%concatArrays()` macro allows to concatenate
two macroarrays created by the `%array()` macro.

By default values of the second macroarray are removed.

Dimensions of the first macroarray are extended.

The `%concatArrays()` macro executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%concatArrays(
  first
 ,second
 <,removeSecond=Y>
) 
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `first` -          *Required*, a name of a macroarray created by the `%array()` macro.

2. `second` -         *Required*, a name of a macroarray created by the `%array()` macro.

*  `removeSecond=Y` - *Optional*, default value `Y`, if set to `Y` then 
                      the second array is removed.




### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Concatenate macroarrays LL and MM.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(ll[2:4] $ 12,
    function = quote(put(today() + 10*_I_, yymmdd10.)),
    macarray=Y
  )
  %array(mm[10:13] $ 12000,
    function = quote(repeat("A",123*_I_)),
    macarray=Y
  )
  %put *%ll(2)*%ll(3)*%ll(4)*;

  %concatArrays(ll, mm); 
  %put *%ll(2)*%ll(3)*%ll(4)*%ll(5)*%ll(6)**%ll(7)*%ll(8)*;

  %put *%mm(10)**%mm(11)*%mm(12)*%mm(13)*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Error handling.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %concatArrays(ll, )
  %concatArrays(, mm)

  %concatArrays(noExistA, noExistB)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---


 
## >>> `%deleteMacArray()` macro: <<< <a name="deletemacarray-macro"></a> #######

The `%deleteMacArray()` macro allows to delete
macroarrays created by the `%array()` macro.

The `%deleteMacArray()` macro executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%deleteMacArray(
  arrs
 <,macarray=N>
) 
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `arrs` -      *Required*, a space separated list of manes 
                 of macroarray created by the `%array()` macro.

* `macarray=N` - *Optional*, indicator should a macro 
                 associated with macroarray to be deleted? 
                 If `Y` or `YES` then the associated macro is deleted.



 
## >>> `%do_over()` macro: <<< <a name="do-over-macro"></a>######################

The code of the macro was inspired by 
*Ted Clay's* and *David Katz's* macro `%do_over()`.

The `%DO_OVER()` macro allows to iterate over macroarray created with 
the `macarray=Y` parameter of the `%ARRAY()` macro.

The `%do_over()` macro executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%do_over(
  array 
 <,phrase=%nrstr(%&array(&_I_.))>
 <,between=%str( )>
 <,which = >
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `array` - *Required*, indicates a macroarray which metadata (Lbound, Hbouns)
             are to be used to loop in the `%do_over()`

* `phrase=` - *Optional*, Default value `%nrstr(%&array(&_I_.))`, 
              a statement to be called in each iteration 
              of the internal do_over's loop. Loop iterator is `_I_`, 
              if you want to use `_I_` or array name 
              [e.g. `%myArr(&_I_.)`] *enclose it* in the `%NRSTR()` 
              macro quoting function.

* `between=` - *Optional*, default value `%str( )` (space), 
               a statement to be called in between each 
               iteration of the internal do_over loop.
               If macroquoted (e.g. `%str( + )`) then the `%unquote()` 
               function is automatically applied.

* `which=` - *Optional*, a _SPACE_ separated list of indexes which 
             should be used to iterate over selected macroarray.
             Possible special characters are `H` and `L` which means 
             *high* and *low* bound of an array, list could be set with 
             colons(`:`) in form of `start:end:by` (*no spaces between!*), 
             if `by` is omitted the default is `1`. If possible use
             `1:5` rather `1 2 3 4 5` since the firs works faster.



### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Simple looping.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(beta[*] j k l m (101 102 103 104), vnames=Y, macarray=Y)

  %put #%do_over(beta)#;

  %put #%do_over(beta, phrase=%nrstr("%beta(&_I_.)"), between=%str(,))#;

  data test1;
    %array(beta[*] j k l m (101 102 103 104), vnames=Y, macarray=Y)
    %do_over(beta, phrase=%nrstr(a&_I_. = "%beta(&_I_.)";))
    put _all_;
  run;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Multiple arrays looping.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(alpha[*] j k l m n, vnames=Y, macarray=Y)
  %array( beta[5] $ , function = "a",  macarray=Y)
  %array(gamma[4] (101 102 103 104),   macarray=Y)

  data test2;
    call streaminit(123);
    %do_over(beta
           , phrase = %nrstr(%beta(&_I_.) = %gamma(&_I_.) * rand('Uniform'); output;) 
           , between = put _all_;
            );
    put _all_;
  run;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 3.** Multiple arrays looping, cont.
    Create multiple datasets.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %do_over(beta
  , phrase = %nrstr( 
      data %alpha(&_I_.)2;  
       call streaminit(123); 
       %beta(&_I_.)x = %gamma(&_I_.) * rand('Uniform');  
       output; 
      run; 
  )
  )
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 4.** Multiple arrays looping, cont.
    Create multiple datasets using a macro.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %macro doit(ds, var=a, val=1);
    data &ds.; 
     call streaminit(123);
     &var. = &val. * rand('Uniform'); 
     output;
    run;
  %mend doit;

  %do_over(beta
    , phrase = %nrstr( 
      %DOIT(%alpha(&_I_.)1, var = %beta(&_I_.), val = %gamma(&_I_.))
      )
  )
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 5.** `%do_over()` inside `%array()`

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(test[*] x1-x12 (1:12), macarray=Y)

  %put **%test(1)**%test(12)**;

  %put #%do_over(test)#;

  %array(abc[*] x1-x12 (%do_over(test,phrase=%nrstr(%eval(100-%test(&_I_.))))), macarray=Y)

  %put **%abc(1)**%abc(12)**;

  %put #%do_over(abc)#;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 6.** Looping over array with *macroquoted* separator.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(alpha[11] (5:15), macarray=Y)

  %let x = %do_over(alpha
  , phrase = %NRSTR(%alpha(&_I_.))
  , between= %str( + )
  );
  %put &=x.;
  %put %sysevalf(&x.);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 7.** Working with the `WHICH=` optional parameter

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(test[*] x01-x12, vnames= Y, macarray=Y)

  %put #%do_over(test)#;

  %put #%do_over(test, which= 1 3 5)#;

  %put #%do_over(test, which= 1:5)#;

  %put #%do_over(test, which= 1:5:2 7 8)#;

  %put #%do_over(test, which= L:H l:h)#;

  %put #%do_over(test, which= L:3 10:h)#;

  %put #%do_over(test, which= L:H h:l:-1 13 14)#;

  %put #%do_over(test, which= %eval(1+1):%eval(5+1))#;

  %put #%do_over(test, which= L:H h:l:-1 13 14, between=%str(,))#;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---


 
## >>> `%do_over2()` macro: <<< <a name="do-over2-macro"></a>####################

The code of the macro was inspired by 
*Ted Clay's* and *David Katz's* macro `%do_over()`.

The `%DO_OVER2()` macro allows to iterate over *two* macroarray created with 
the `macarray=Y` parameter of the `%ARRAY()` macro.

The `%do_over2()` macro executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%do_over2(
  arrayI
 ,arrayJ
 <,phrase=%nrstr(%&arrayI(&_I_.) %&arrayJ(&_J_.))>
 <,between=%str( )>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `arrayI` -  Required, indicates the first macroarray which metadata (Lbound, Hbouns)
               are to be used in the outer loop in the `%do_over2()`

2. `arrayJ` -  Required, indicates the second macroarray which metadata (Lbound, Hbouns)
               are to be used in the inner loop in the `%do_over2()`

* `phrase=` -  *Optional*, default value `%nrstr(%&arrayI(&_I_.) %&arrayJ(&_J_.))`, 
               a statement to be called in each iteration 
               of the *inner* loop. The outer loop iterator is `_I_`,
               the inner loop iterator is `_J_`,
               if you want to use `_I_`, `_J_`, or arrays names 
               [e.g. `%myArr(&_I_.)`] *enclose them* in the `%NRSTR()` 
               macro quoting function. 

* `between=` - *Optional*, default value `%str( )` (space), 
               a statement to be called in between each 
               iteration of the internal do_over2 loop.
               If macroquoted (e.g. `%str( + )`) then the `%unquote()` 
               function is automatically applied.




### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Looping over two arrays.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(alpha[*] j k l m n, vnames=Y, macarray=Y)
  %array( beta[4] (101 102 103 104),   macarray=Y)

  %put *%do_over2(alpha, beta
  , phrase = %NRSTR((%alpha(&_I_.), %beta(&_J_)))
  )*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Looping over two arrays with a separator.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(alpha[11] (5:15),            macarray=Y)
  %array( beta[ 4] (101 102 103 104), macarray=Y)

  %let x = %do_over2(alpha, beta
  , phrase = %NRSTR((%alpha(&_I_.) * %beta(&_J_)))
  , between= + 
  );
  %put &=x.;
  %put %sysevalf(&x.);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 3.** Looping over two arrays with *macroquoted* separator.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(alpha[11] (5:15),            macarray=Y)
  %array( beta[ 4] (101 102 103 104), macarray=Y)

  %let x = %do_over2(alpha, beta
  , phrase = %NRSTR((%alpha(&_I_.) * %beta(&_J_)))
  , between= %str( + )
  );
  %put &=x.;
  %put %sysevalf(&x.);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---


 
## >>> `%do_over3()` macro: <<< <a name="do-over3-macro"></a>####################

The code of the macro was inspired by 
*Ted Clay's* and *David Katz's* macro `%do_over()`.

The `%DO_OVER3()` macro allows to iterate over *three* macroarray created with 
the `macarray=Y` parameter of the `%ARRAY()` macro.

The `%do_over3()` macro executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%do_over2(
  arrayI
 ,arrayJ
 ,arrayK
 <,phrase=%nrstr(%&arrayI(&_I_.) %&arrayJ(&_J_.) %&arrayK(&_K_.))>
 <,between=%str( )>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `arrayI` -  *Required*, indicates the first macroarray which metadata (Lbound, Hbouns)
               are to be used in the outer loop in the `%do_over3()`

2. `arrayJ` -  *Required*, indicates the second macroarray which metadata (Lbound, Hbouns)
               are to be used in the inner loop in the `%do_over3()`

3. `arrayK` -  *Required*, indicates the third macroarray which metadata (Lbound, Hbouns)
               are to be used in the inner loop in the `%do_over3()`

* `phrase=` -  *Optional*, default value `%nrstr(%&arrayI(&_I_.) %&arrayJ(&_J_.) %&arrayK(&_K_.))`, 
               a statement to be called in each iteration 
               of the *inner* loop. The *outer* loop iterator is `_I_`,
               the *middle* loop iterator is `_J_`, the *inner* loop iterator is `_K_`,
               if you want to use `_I_`, `_J_`, `_K_`, or arrays names 
               [e.g. `%myArr(&_I_.)`] *enclose them* in the `%NRSTR()` 
               macro quoting function. 

* `between=` - *Optional*, default value `%str( )` (space), 
               a statement to be called in between each 
               iteration of the internal do_over2 loop.
               If macroquoted (e.g. `%str( + )`) then the `%unquote()` 
               function is automatically applied.




### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Looping over 3 macroarrays.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(a1_[2] (0 1), macarray=Y)
  %array(a2_[2] (2 3), macarray=Y)
  %array(a3_[2] (4 5), macarray=Y)

  %do_over3(a1_, a2_, a3_
  , phrase = %NRSTR(%put (%a1_(&_I_.), %a2_(&_J_), %a3_(&_K_));)
  )
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**EXAMPLE 2.** Looping 3 times over a macroarray.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(a[0:2] (0 1 2), macarray=Y)

  %do_over3(a, a, a
  , phrase = %NRSTR(%put (%a(&_I_.), %a(&_J_), %a(&_K_));)
  )
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---


 
## >>> `%make_do_over()` macro: <<< <a name="make-do-over-macro"></a> ###########

The code of the macro was inspired by 
*Ted Clay's* and *David Katz's* macro `%do_over()`.

The `%make_do_over()` macro allows to generate
the `%DO_OVER<n>()` macros. It works *only* for *n>3*!

The `%make_do_over()` macro does *not* executes like a pure macro code.

### SYNTAX: #####################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%make_do_over(
  size
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `size` - *Required*, indicates the number of dimensions 
            (i.e. inner loops) of the `%DO_OVER<n>()` macro.




### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Code of created "4-loop" `%DO_OVER4()` macro

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
    %macro do_over4(
      arrayI1, 
      arrayI2, 
      arrayI3, 
      arrayI4,
      phrase=%nrstr(
    %&arrayI1(&_I1_.)
    %&arrayI2(&_I2_.)
    %&arrayI3(&_I3_.)
    %&arrayI3(&_I4_.)
    ), 
      between=%str( )
    );
      %local _I1_ _I2_ _I3_ _I4_;
      %do _I1_ = &&&arrayI1.LBOUND %to &&&arrayI1.HBOUND;
      %do _I2_ = &&&arrayI2.LBOUND %to &&&arrayI2.HBOUND;
      %do _I3_ = &&&arrayI3.LBOUND %to &&&arrayI3.HBOUND;
      %do _I4_ = &&&arrayI4.LBOUND %to &&&arrayI4.HBOUND;
      %if not (
            &_I1_. = &&&arrayI1.LBOUND 
        AND &_I2_. = &&&arrayI2.LBOUND
        AND &_I3_. = &&&arrayI3.LBOUND
        AND &_I4_. = &&&arrayI4.LBOUND
        ) 
      %then %do;%unquote(&between.)%end;%unquote(%unquote(&phrase.))
      %end;
      %end;
      %end;
      %end;
    %mend do_over4;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Create a "4-loop" `%DO_OVER4()` macro

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %make_do_over(4);

  %array(a1_[2] (0 1), macarray=Y)

  %do_over4(a1_, a1_, a1_, a1_
  , phrase = %NRSTR(%put (%a1_(&_I1_.), %a1_(&_I2_), %a1_(&_I3_), %a1_(&_I4_));)
  )

  %put *%do_over4(a1_, a1_, a1_, a1_
  , between = *
  )*;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**EXAMPLE 3.** Create a "5-loop" `%DO_OVER5()` macro

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %make_do_over(5);

  %array(a1_[2] (0 1), macarray=Y)

  %do_over5(a1_, a1_, a1_, a1_, a1_
  , phrase = %NRSTR(%put (%a1_(&_I1_.), %a1_(&_I2_), %a1_(&_I3_), %a1_(&_I4_), %a1_(&_I5_));)
  )

  %put *%do_over5(a1_, a1_, a1_, a1_, a1_
  , between = *
  )*
  ;

  options nomprint;
  data test2;
    %do_over5(a1_, a1_, a1_, a1_, a1_
    , phrase = %NRSTR(x1 = %a1_(&_I1_.); x2 = %a1_(&_I2_); x3 = %a1_(&_I3_); x4 = %a1_(&_I4_);  x5 = %a1_(&_I5_);)
    , between = output;
    )
  output;
  run;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 4.** Create all from 6 to 10 "do_overs"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
  %array(loop[6:10] (6:10), macarray=Y)
  %do_over(loop
    , phrase = %nrstr( 
      %make_do_over(%loop(&_I_.))
      )
  );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---

## >>> `%mcHashTable()` macro: <<< <a name="mchashtable-macro"></a> #######################

The `%mcHashTable()` macro provided in the package 
is designed to facilitate the idea of a "macro hash table" 
concept, i.e. *a list of macrovariables with common prefix 
and suffixes generated as a hash digest* which allows 
to use values other than integers as indexes.

The `%mcHashTable()` macro allows to generate other macros 
which behaves like hash tables or dictionaries. See examples below.

The `%mcHashTable()` macro executes like a pure macro code.

### SYNTAX: ###################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable(
   H
  <,METHOD>
  <,HASH=>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `H`      - *Required*, a hash table macro name and a declaration/definition, 
              e.g. `mcHashTable(HT)`. It names a macro which is generated by
              the `%mcHashTable()` macro. Provided name cannot be empty 
              or an underscore (`_`). No longer than *16* characters.

2. `METHOD` - *Optional*, if empty (or DECLARE or DCL) then the code of 
              a macro hash table is compiled.
              If `DELETE` then the macro hash table named by `H` and all 
              macrovariables named like "`&H._`" are deleted.

* `HASH=`   - *Optional*, indicates which hashing algorithms should be used,
              available values are `CRC32` or `MD5`, the `CRC32` is the default. 

---

### THE CREATED MACRO `%&H.()`: ####################################################

The created macro imitates behaviour of a hash table or a dictionary. 
It is *not* dedicated for "long-ish" lists (above 1000 elements) since 
the performance may be poor.

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%&H.(
  METHOD
  <,KEY=> 
  <,DATA=>
)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `METHOD` - *Required*, indicate what behaviour should be executed. 
              Allowed values are:
                - `ADD`, adds key and data portion to the macro hash table,
                   *multiple data portions* are available for one key.
                - `FIND`, tests if given key exists in the macro hash table
                   and, if yes, returns data value associated with the key.
                   For multiple data portions see the `data=` parameter.
                - `DP` (data portion) or `CHECK`, returns the number of data
                   portions for a given key.
                - `CLEAR` removes all data and keys values.
                - `KEYIDX`, allows to get data by the key index rather than value.
                - `KEYVAL`, returns key value for a given key index.
                - `CHECKIDX`, returns the number of data portions for 
                   a given key index. 

* `KEY=`    - *Optional*, provides key value for `ADD`, `FIND`,`DP`, `CHECK`
              `CHECKIDX`, `KEYIDX`, and `KEYVAL` methods. Leading and trimming 
              spaces are removed from the value.
              The `hashing(CRC32,...)` function or the `MD5(...)` function is 
              used to generate the hash.

* `DATA=`   - *Optional*, provides data value for the `ADD` method and 
              for the`FIND` method provides data portion number to be 
              extracted. Default value is `1` (used by the `FIND` method).


When macro is executed and when data are added the following types of 
*global* macrovariables are created:
- `&H._########`,
- `&H._########_Xk`,
- `&H._########_Xi`,
- `&H._########_Xi_j`,
- `&H._KEYNUM`,
- and `&H._KEY_i`.

The `#` represents value generated by the `hashing(CRC32,...)` function 
or the `MD5(...)` function for the given key.

The first type keeps information about possible collision for the key.

The second type keeps information about value of a given key, 
the `X` keeps the track of other colliding keys.

The third type keeps information about number of data portions 
for given key, the `X` keeps the track of other colliding keys.

The fourth type keeps the data portion, the `j` indicates data portion number.

The fifth type keeps the number of unique values of the key.

The sixth type keeps the list of unique values of the key, 
the `i` indicates key number.

See examples below to see use cases.

---

### EXAMPLES AND USECASES: ####################################################


**EXAMPLE 1.** Basic use-case. 
  Creating macro hash table, macro `HT` is generated.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable(HT)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Add elements to the `HT`.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%HT(ADD,key=x,data=17)
%HT(ADD,key=y,data=42)
%HT(ADD,key=z,data=303)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Add some duplicates for the key x. 
  See macrovariables created.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%HT(ADD,key=x,data=18) 
%HT(ADD,key=x,data=19)

%put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Check the number od data portions in macrohash
  for the key `x` and non existing key `t`.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put ##%HT(DP,key=x)##;
%put ##%HT(DP,key=t)##;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Check the number od data portions in macrohash
  for the key index 1 and 4.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put ##%HT(CHECKIDX,key=1)##;
%put ##%HT(CHECKIDX,key=4)##;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Prints first data values for various keys.
  Key `t` does not exist in the macrohash.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put #%HT(FIND,key=x)#;
%put #%HT(FIND,key=y)#;
%put #%HT(FIND,key=z)#;
%put #%HT(FIND,key=t)#;

%put #%HT(FIND,key=x,data=2)#;
%put #%HT(FIND,key=x,data=3)#;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Print first and subsequent data values 
  for a given KeyIDX. Index `4` does not exist.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put #%HT(KEYIDX,key=1)#;
%put #%HT(KEYIDX,key=2)#;
%put #%HT(KEYIDX,key=3)#;
%put #%HT(KEYIDX,key=4)#;

%put #%HT(KEYIDX,key=1,data=2)#;
%put #%HT(KEYIDX,key=1,data=3)#;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Print the key values for a given KeyIDX.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put #%HT(KEYVAL,key=1)#;
%put #%HT(KEYVAL,key=2)#;
%put #%HT(KEYVAL,key=3)#;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Clear and delete macro hash table `HT`.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%HT(CLEAR)
%mcHashTable(HT,DELETE)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Combine `CHECK` and `FIND` methods
  with macros `%array()` and `%do_over()`

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable(H)
%H(ADD,key=x,data=17)
%H(ADD,key=x,data=18) 
%H(ADD,key=x,data=19)

%array(A[%H(CHECK,key=x)]);

%put %do_over(A, phrase=%nrstr(
  %H(FIND,key=x,data=&_i_)
), between = %str(,));

%mcHashTable(H,delete)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 3.** Populate macro hash table from a dataset.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable(CLASS)
%let t = %sysfunc(datetime());
data _null_;
  set sashelp.class;
  call execute('%CLASS(ADD,key=' !! name !! ',data=' !! age !! ')');
  call execute('%CLASS(ADD,key=' !! name !! ',data=' !! weight !! ')');
  call execute('%CLASS(ADD,key=' !! name !! ',data=' !! height !! ')');
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put _user_;
%CLASS(CLEAR)


%mcHashTable(CARS)
%let t = %sysfunc(datetime());
data _null_;
  set sashelp.cars;
  call execute('%CARS(ADD,key=' !! catx("|",make,model)  !! ',data=' !! MPG_CITY !! ')');
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%* %put _user_;
%CARS(CLEAR)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 4.** Data portion may require quoting and un-quoting..

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable(CODE)
%CODE(CLEAR)
%CODE(ADD,key=data, data=%str(data test; x = 42; run;))
%CODE(ADD,key=proc, data=%str(proc print; run;))
%CODE(ADD,key=macro,data=%nrstr(%put *****;))

%CODE(FIND,key=data)
%CODE(FIND,key=proc) 
%unquote(%CODE(FIND,key=macro))

%mcHashTable(CODE,DELETE)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 5.** Longer lists.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%let size = 1000;

%mcHashTable(AAA)
%mcHashTable(BBB)
%mcHashTable(CCC)
%mcHashTable(DDD)

%let t = %sysfunc(datetime());
data _null_;
  do i = 1 to &size.;
    call execute(cats('%AAA(ADD,key=A', i, ',data=', i, ')'));
  end;
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put &=AAA_KEYSNUM;
%AAA(CLEAR)

%let t = %sysfunc(datetime());
data _null_;
  do i = 1 to &size.;
    call execute(cats('%BBB(ADD,key=B', i, ',data=', i, ')'));
    call execute(cats('%BBB(ADD,key=B', i, ',data=', i+1, ')'));
  end;
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put &=BBB_KEYSNUM;
%BBB(CLEAR)

%let t = %sysfunc(datetime());
data _null_;
  t= datetime();
  do i = 1 to &size.;
    call execute(cats('%CCC(ADD,key=C', i, ',data=', i, ')'));
  end;
  t = datetime() - t;
  put t=;
  t= datetime();
  do i = 1 to &size.;
    call execute(cats('%CCC(ADD,key=C', i, ',data=', i+1, ')'));
  end;
  t = datetime() - t;
  put t=;
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);

%let t = %sysfunc(datetime());
data test;
  do i = 1 to &size.;
    x = resolve(cats('%CCC(FIND,key=C', i, ',data=1)'));
    y = resolve(cats('%CCC(FIND,key=C', i, ',data=2)'));
    output;
  end;
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put &=CCC_KEYSNUM;
%CCC(CLEAR)

%let t = %sysfunc(datetime());
data _null_;
  do i = 1 to &size.;
    call execute(cats('%DDD(ADD,key=D,data=', i, ')'));
  end;
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put &=DDD_KEYSNUM;
%put %DDD(CHECK,key=D);
%DDD(CLEAR)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 6.** Forbidden names.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable()
%mcHashTable(_)

%mcHashTable(ABCDEFGHIJKLMNOPQ) %* bad;
%mcHashTable(ABCDEFGHIJKLMNOP)  %* good;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**EXAMPLE 7.** Hashing algorithms.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcHashTable(H1,DCL,HASH=MD5)
%mcHashTable(H2,DECLARE,HASH=CRC32)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---

## >>> `%mcDictionary()` macro: <<< <a name="mcdictionary-macro"></a> #######################

The `%mcDictionary()` macro provided in the package 
is designed to facilitate the idea of a "macro dictionary" 
concept, i.e. *a list of macrovariables with common prefix 
and suffixes generated as a hash digest* which allows 
to use values other than integers as indexes.

The `%mcDictionary()` macro allows to generate other macros 
which behaves like a dictionary. See examples below.

The `%mcDictionary()` macro executes like a pure macro code.

### SYNTAX: ###################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%mcDictionary(
   H
  <,METHOD>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `H`      - *Required*, a dictionary macro name and a declaration/definition, 
              e.g. `mcDictionary(HT)`. It names a macro which is generated by
              the `%mcDictionary()` macro. Provided name cannot be empty 
              or an underscore (`_`). No longer than *16* characters.

2. `METHOD` - *Optional*, if empty (or DECLARE or DCL) then the code of 
              a macro dictionary is compiled.
              If `DELETE` then the macro dictionary named by `H` and all 
              macrovariables named like "`&H._`" are deleted.

---

### THE CREATED MACRO `%&H.()`: ####################################################

The created macro imitates behaviour of a dictionary. 

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%&H.(
  METHOD
  <,KEY=> 
  <,DATA=>
)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `METHOD` - *Required*, indicate what behaviour should be executed. 
              Allowed values are:
                - `ADD`, adds key and data portion to the macro dictionary,
                   *multiple data portions* are NOT available for one key.
                - `FIND`, tests if given key exists in the macro dictionary
                   and, if yes, returns data value associated with the key.
                   For multiple data portions see the `data=` parameter.
                - `CHECK`, returns indicator if the key exists in dictionary.
                - `DEL`, removes key and data portion from the macro dictionary.
                - `LIST`, prints out a dictionary to the log. 
                - `CLEAR` removes all data and keys values.

* `KEY=`    - *Optional*, provides key value for `ADD`, `FIND`, `CHECK`
              and `DEL` methods. 
              Leading and trimming spaces are removed from the value.
              The `MD5(...)` function is used to generate the hash.
              Default value is `_`.

* `DATA=`   - *Optional*, provides data value for the `ADD` method. 
              Default value is blank.


When macro is executed and when data are added the following types of 
*global* macrovariables are created:
- `&H._########_K`,
- `&H._########_V`,
- `&H._KEYSNUM`.

The `#` represents value generated by the `MD5(...)` function for the given key.

The first type keeps information about the key.

The second type keeps information about the value of a given key

The third type keeps the number of unique values of the key.

See examples below to see use cases.

---

### EXAMPLES AND USECASES: ####################################################


**EXAMPLE 1.** Basic use-case. 
  Creating macro dictionary, macro `Dict` is generated.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcDictionary(Dict)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Add elements to the `Dict`.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%Dict(ADD,key=x,data=17)
%Dict(ADD,key=y y,data=42)
%Dict(ADD,key=z z z,data=303)

%put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Add some duplicates for the key x. 
  See macrovariables created.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%Dict(ADD,key=x,data=18) 

%put _user_;

%Dict(ADD,key=x,data=19)

%put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Check for the key `x` and non existing key `t`.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put ##%Dict(CHECK,key=x)##;
%put ##%Dict(CHECK,key=t)##;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Prints data values for various keys.
  Key `t` does not exist in the macrodictionary.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put #%Dict(FIND,key=x)#;
%put #%Dict(FIND,key=y y)#;
%put #%Dict(FIND,key=z z z)#;
%put #%Dict(FIND,key=t)#;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  List dictionary content to the log.
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%Dict(LIST);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Delete keys.
  Key `t` does not exist in the macrodictionary.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%put #%Dict(DEL,key=z z z)#;
%put _user_;
%put #%Dict(DEL,key=t)#;
%put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Clear and delete macro dictionary `Dict`.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%Dict(CLEAR)
%put _user_;

%mcDictionary(Dict,DELETE)
%put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Populate macro dictionary from a dataset.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcDictionary(CLASS)
%let t = %sysfunc(datetime());
data _null_;
  set sashelp.class;
  call execute('%CLASS(ADD,key=' !! name !! ',data=' !! age !! ')');
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put _user_;
%CLASS(CLEAR)


%mcDictionary(CARS)
%let t = %sysfunc(datetime());
data _null_;
  set sashelp.cars;
  call execute('%CARS(ADD,key=' !! catx("|",make,model,type)  !! ',data=' !! MPG_CITY !! ')');
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put &=CARS_KEYSNUM.;
%CARS(LIST);
%CARS(CLEAR)
%put &=CARS_KEYSNUM.;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 3.** Data portion may require quoting and un-quoting..

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcDictionary(CODE)
%CODE(CLEAR)
%CODE(ADD,key=data, data=%str(data test; x = 42; run;))
%CODE(ADD,key=proc, data=%str(proc print; run;))
%CODE(ADD,key=macro,data=%nrstr(%put *****;))

%CODE(FIND,key=data)
%CODE(FIND,key=proc) 
%unquote(%CODE(FIND,key=macro))

%CODE(LIST);

%mcDictionary(CODE,DELETE)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 4.** Longer lists.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%let size = 1000;

%mcDictionary(AAA)

%let t = %sysfunc(datetime());
data _null_;
  do i = 1 to &size.;
    call execute(cats('%AAA(ADD,key=A', i, ',data=', i, ')'));
  end;
run;
%put t = %sysevalf(%sysfunc(datetime()) - &t.);
%put &=AAA_KEYSNUM;
%AAA(CLEAR)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 5.** Forbidden names.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%mcDictionary()
%mcDictionary(_)

%mcDictionary(ABCDEFGHIJKLMNOPQ) %* bad;
%mcDictionary(ABCDEFGHIJKLMNOP)  %* good;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---

## >>> `%QzipArrays()` macro: <<< <a name="qziparrays-macro"></a> #######################  

The zipArrays() and QzipArrays() macros
allow to use a function on elements of pair of 
macro arrays. 

For two macroarrays the corresponding 
elements are taken and the macro applies a function, provided by user, 
to calculate result of the function on taken elements. 

When one of the arrays is shorter then elements are, by default, 
"reused" starting from the beginning. But this behaviour can be altered. 
See examples for the details.

By default newly created macroarray name is concatenation 
of first 13 characters of names of arrays used to create the new one, 
e.g. if arrays names are `abc` and `def` then the result name is `abcdef`,
if arrays names are `abcd1234567890` and `efgh1234567890` then the result 
name is `abcd123456789efgh123456789` 

The `zipArrays()` returns unquoted value [by `%unquote()`].
The `QzipArrays()` returns quoted value [by `%superq()`].

See examples below for the details.

The `%QzipArrays()` macro executes like a pure macro code.

### SYNTAX: ###################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%QzipArrays(
    first
   ,second
  <,function=>
  <,operator=> 
  <,argBf=>
  <,argMd=>
  <,argAf=>
  <,format=>
  <,result=>
  <,macarray=>
  <,reuse=>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `first`         - *Required*, a space separated list of texts.

2. `second`        - *Required*, a space separated list of texts.

* `function = cat` - *Optional*, default value is `cat`, 
                     a function which will be applied 
                     to corresponding pairs of elements of 
                     the first and the second list. 

* `operator =`     - *Optional*, default value is empty,
                     arithmetic infix operator used with elements 
                     the first and the second list. The first
                     list is used on the left side of the operator
                     the second list is used on the right side
                     of the operator. 

* `argBf =`        - *Optional*, default value is empty,
                     arguments of the function inserted
                     *before* elements the first list.
                     If multiple should be comma separated.

* `argMd =`        - *Optional*, default value is empty,
                     arguments of the function inserted
                     *between* elements the first list and 
                     the second list.
                     If multiple should be comma separated.

* `argAf =`        - *Optional*, default value is empty,
                     arguments of the function inserted
                     *after* elements the second list.
                     If multiple should be comma separated.

* `format=`        - *Optional*, default value is empty,
                     indicates a format which should be used
                     to format the result, does not work when 
                     the `operator=` is used.

* `result=`        - *Optional*, default value is empty,
                     indicates a name of newly created macroarray,
                     by default created macroarray name is concatenation 
                     of first 13 characters of names of arrays used 
                     to create the new one.

* `macarray=N`     - *Optional*, default value is `N`, 
                     if set to `Y`/`YES` then a macro, named with 
                     the array name, is compiled to create convenient 
                     envelope for multiple ampersands, see the 
                     `%array()` macro for details.

* `reuse=Y`        - *Optional*, default value is `Y`,
                     when one of the arrays is shorter then elements 
                     are *reused* starting from the beginning.
                     If `CP` then function  is executed on the *Cartesian 
                     product* of arrays elements. Any other value will
                     cut the process with the end of the shorter array.
                     See examples for the details.

### EXAMPLES AND USECASES: ####################################################

See examples in `%zipArrays()` help for the details.

---

## >>> `%zipArrays()` macro: <<< <a name="ziparrays-macro"></a> #######################  

The zipArrays() and QzipArrays() macros
allow to use a function on elements of pair of 
macro arrays. 

For two macroarrays the corresponding 
elements are taken and the macro applies a function, provided by user, 
to calculate result of the function on taken elements. 

When one of the arrays is shorter then elements are, by default, 
"reused" starting from the beginning. But this behaviour can be altered. 
See examples for the details.

By default newly created macroarray name is concatenation 
of first 13 characters of names of arrays used to create the new one, 
e.g. if arrays names are `abc` and `def` then the result name is `abcdef`,
if arrays names are `abcd1234567890` and `efgh1234567890` then the result 
name is `abcd123456789efgh123456789` 

The `zipArrays()` returns unquoted value [by `%unquote()`].
The `QzipArrays()` returns quoted value [by `%superq()`].

See examples below for the details.

The `%zipArrays()` macro executes like a pure macro code.

### SYNTAX: ###################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%zipArrays(
    first
   ,second
  <,function=>
  <,operator=> 
  <,argBf=>
  <,argMd=>
  <,argAf=>
  <,format=>
  <,result=>
  <,macarray=>
  <,reuse=>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `first`         - *Required*, a space separated list of texts.

2. `second`        - *Required*, a space separated list of texts.

* `function = cat` - *Optional*, default value is `cat`, 
                     a function which will be applied 
                     to corresponding pairs of elements of 
                     the first and the second list. 

* `operator =`     - *Optional*, default value is empty,
                     arithmetic infix operator used with elements 
                     the first and the second list. The first
                     list is used on the left side of the operator
                     the second list is used on the right side
                     of the operator. 

* `argBf =`        - *Optional*, default value is empty,
                     arguments of the function inserted
                     *before* elements the first list.
                     If multiple should be comma separated.

* `argMd =`        - *Optional*, default value is empty,
                     arguments of the function inserted
                     *between* elements the first list and 
                     the second list.
                     If multiple should be comma separated.

* `argAf =`        - *Optional*, default value is empty,
                     arguments of the function inserted
                     *after* elements the second list.
                     If multiple should be comma separated.

* `format=`        - *Optional*, default value is empty,
                     indicates a format which should be used
                     to format the result, does not work when 
                     the `operator=` is used.

* `result=`        - *Optional*, default value is empty,
                     indicates a name of newly created macroarray,
                     by default created macroarray name is concatenation 
                     of first 13 characters of names of arrays used 
                     to create the new one.

* `macarray=N`     - *Optional*, default value is `N`, 
                     if set to `Y`/`YES` then a macro, named with 
                     the array name, is compiled to create convenient 
                     envelope for multiple ampersands, see the 
                     `%array()` macro for details.

* `reuse=Y`        - *Optional*, default value is `Y`,
                     when one of the arrays is shorter then elements 
                     are *reused* starting from the beginning.
                     If `CP` then function  is executed on the *Cartesian 
                     product* of arrays elements. Any other value will
                     cut the process with the end of the shorter array.
                     See examples for the details.

### EXAMPLES AND USECASES: ####################################################

**EXAMPLE 1.** Simple concatenation of elements:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(a[*] x1-x3 (1:3))
%array(b[*] x1-x5 (11:15))

%put _user_;

%zipArrays(a, b);
%put _user_;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Shorter list is "reused":
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(a[6] (1:6))
%array(b[3] (10 20 30))

%zipArrays(a, b, result=A_and_B, macarray=Y);
%put %do_over(A_and_B);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 3.** Use of the `operator=`:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(c[0:4] (000 100 200 300 400))
%array(d[2:16] (1002:1016))

%zipArrays(c, d, operator=+, result=C_plus_D, macarray=Y);
%put (%do_over(C_plus_D));

%put %C_plus_D(1);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 4.** If one of array names is empty or an array does not exist:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(a[6] (1:6))
%array(b[3] (10 20 30))

%zipArrays(a, );
%zipArrays(, b);

%zipArrays(a, z);
%zipArrays(z, b);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 5.** Use of the `function=`:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(one[3] A B C, vnames=Y)
%array(two[5] p q r s t, vnames=Y)

%zipArrays(
 one
,two
,function = catx
,argBf = %str( )
,format = $quote.
,macarray=Y
)
%put %do_over(onetwo);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 6.** To reuse or not to reuse, or maybe Cartesian product:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(e[3] (10 20 30))
%array(f[2] (5:6))

%zipArrays(e, f, reuse=n,  operator=+, macarray=Y, result=_noReuse);
%zipArrays(e, f, reuse=y,  operator=+, macarray=Y, result=_yesReuse);
%zipArrays(e, f, reuse=cp, operator=+, macarray=Y, result=_cartProdReuse);

%put %do_over(_noReuse);
%put %do_over(_yesReuse);
%put %do_over(_cartProdReuse);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 7.** Use middle argument:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
%array(yr[3] (2018:2020))
%array(mth[12] (1:12))

%zipArrays(mth, yr, argMd=5, function=MDY, format=date11., macarray=Y);
%put %do_over(mthyr);

%zipArrays(mth, yr, argMd=5, function=MDY, format=date11., macarray=Y, reuse=cp);
%put %do_over(mthyr);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---

## >>> `%sortMacroArray()` macro: <<< <a name="sortmacroarray-macro"></a> #######################  

The sortMacroArray() macro
allow to sort elements of a macro array. 

The **limitation** is that sorted values are limited to 32767 bytes of length.

See examples below for the details.

### SYNTAX: ###################################################################

The basic syntax is the following, the `<...>` means optional parameters:
~~~~~~~~~~~~~~~~~~~~~~~sas
%sortMacroArray(
    array
  <,valLength=>
  <,outSet=> 
  <,sortseq=>
)
~~~~~~~~~~~~~~~~~~~~~~~

**Arguments description**:

1. `array`             - *Required*, name of an array generated by the `%array()` macro.

* `valLength = 32767`  - *Optional*, default value is `32767`, 
                          maximum length of a variable storing macrovariable data.
                          (the reason of 32767 limitation) 

* `outSet    = _NULL_` - *Optional*, default value is `_NULL_`,
                          an optional output dataset name. 

* `sortseq  =`         - *Optional*, default value is `LINGUISTIC(NUMERIC_COLLATION = ON)`,
                          sorting options for use in an internal `Proc SORT`.

### EXAMPLES AND USECASES: ####################################################


**EXAMPLE 1.** Basic use-case. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas

options mprint;
ods html;
ods listing close;


%array(hij [4:9] $ 512 ("C33" "B22" "A11" "A01" "A02" "X42"), macarray=Y)

%put NOTE: %do_over(hij);

%sortMacroArray(hij, valLength=3, outSet = A_NULL_(compress=char))

%put NOTE: %do_over(hij);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


**EXAMPLE 2.** Basic use-case. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas

options mprint;
ods html;
ods listing close;


%array(ds = sashelp.class, vars = name|NNN height|h, macarray=Y)
%array(ds = sashelp.cars, vars = model|, macarray=Y)

%put NOTE: %do_over(NNN);
%put NOTE: %do_over(H);
%put NOTE: %do_over(model);

%sortMacroArray(NNN, valLength=30, outSet = A_NULL_(compress=char))
%sortMacroArray(H, valLength=32)
%sortMacroArray(model, valLength=120)

%put NOTE: %do_over(NNN);
%put NOTE: %do_over(H);
%put NOTE: %do_over(model);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---

## License ####################################################################

Copyright (c) Bartosz Jablonski, since January 2019

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

---
