Switch strings in a file

Question

I have a string needs to be changed in a file between two values. What I want to do is if I found value A then change to value B, if I found value B then change to value A.

Answer 1

This isn't tested extensively, but I think it should work:

path = c:\work\test.xml
$A = 'AAAAA'
$B = 'BBBBB'

[regex]$regex = "$A|$B"

$text = 
Get-Content $path | 
foreach {
$regex.Replace($text,{if ($args[0].value -eq $A){$B} else {$A}})
}

$text | Set-Content $path

Hard to be sure without knowing exactly what the data looks like.