Need help with arrays! (dont add same arrays)

All the time I find it difficult to use arrays becouse all that redim, ubound stuff.. so I used variables alot!

I need func which would allow to add only unique arrays.

#include <Array.au3>
$ArraySTORAGE=_ArrayCreate("")
$ArraySTORAGE[0] = Ubound($ArraySTORAGE) - 1
$whattoadd = 'always other string'
For $i = 1 To UBound($ArraySTORAGE) - 1

If  |$ArraySTORAGE contains| = $whattoadd Then
;;;
Else
_ArrayAdd($ArraySTORAGE ,$whattoadd )
Endif

Next

Should I use  _ArraySearch() ?


Also I want to know how to clear whole array at once without using loop with _ArrayDelete()

+ I want to create 2D array but I dont know how to declare it in begining becouse all my elements would be added during the script (imputs/plits and so on..)

I hope you guys understand me