>>>2) One which concatenate 2 arrays (same dim)
>>Why?
>>
>When I need to merge 2 array into 1

You can achieve this by aCopy() - first time to copy the first array, second to add the second. Would need to redimension the result at some point - maybe before the first aCopy().

>>>3) One which find the max len/size of elements (in a col)
>>What is the MAX() size of element in array that have integer, string and date values?
>>
>>

>>DECLARE laTest[3]
>>laTest[1] = 1234
>>laTest[2] = [Test Me]
>>laTest[3] = DATE()
>>

>>
>I am refering to array with same type of elements (or same type of element per col)

But a general purpose array function library would need to check for type first. Which is yet another reason why w don't have it.

>>>4) One which rotate elements in array
>>
>>What you mean with rotate?
>>
>Imagine the array is a ring where the 1st element attach to the last ele, then rotate.
>(Clockwise: last ele become first, 1st become second and it follows)

dimension to one extra row
copy 1st row to last
adel(1st row)
dimension to one row less