Generate 3rd array based on contents of 2 others

[therms]

Given arrays 1 and 2, does anyone have any suggestions on how to create array 3 which contains everything from array 1 except that which is in array 2?

Example array 1

a b c d e f g

Example array 2

d e b

Example array 3

a b c f g

[monoceres]

Loops and arrays goes hand in hand

#include <array.au3>
Dim $a1[5]=[1,4,7,10,23]
Dim $a2[2]=[4,10]
Dim $a3[1]
For $i=0  To UBound($a1)-1
    For $j=0 To Ubound($a2)-1
        If $a1[$i]=$a2[$j] Then ContinueLoop 2
    Next
    _ArrayAdd($a3,$a1[$i])
Next
_ArrayDelete($a3,0)
_ArrayDisplay($a3)

[monoceres]

Here's the same thing without Array.au3 (I'm currently trying to avoid it in my scripts since it's horrible slow):

Dim $string
Dim $a1[5]=[1,4,7,10,23]
Dim $a2[2]=[4,10]
Dim $a3[1]
For $i=0  To UBound($a1)-1
    For $j=0 To Ubound($a2)-1
        If $a1[$i]=$a2[$j] Then ContinueLoop 2
    Next
    ReDim $a3[UBound($a3)+1]
    $a3[UBound($a3)-1]=$a1[$i]
Next
For $h=1 To UBound($a3)-1
    $string&=$h&": "&$a3[$h]&@CRLF
Next
MsgBox(0,"Array Display",$string)

[weaponx]

Looks familiar:

http://www.autoitscript.com/forum/index.ph...p;hl=arraymerge

[monoceres]

Looks familiar:

http://www.autoitscript.com/forum/index.ph...p;hl=arraymerge

how do you mean?

[therms]

Thank you very much guys. For some reason my brain just wasn't working this afternoon.

Now let me ask if I'm approaching my task in the best way possible.

Array1 is actually a list of all files in a directory.

Array2 is a subset of Array1.

I want to delete all files except for those in Array2.

My first thought was to create a third array as described above and then delete those files.

Thoughts?

[monoceres]

I say it's okay, especially since the code I posted basically is just two loops so it should run pretty fast