Find/Replace Extended Character Set characters in filenames in one pipeline

Question

Hello all,
I have to work with some very bored people. Instead of putting a dash (hex 2d) into a filename, they opt for something from this
set of extended characters, which makes my regular expressions fail.  IS there a way I can efficiently find & replace anything outside the standard character set
in one pipelinewithout finding and replacing a character at a time?
So,I'd like something like:
get-childitem * | where-object $_.name -match '\x99' | rename-item -newname { $_.name -replace '\x99','='}
from hex 80 to hex FF rather than a for-each.
Thanks.

Answer 1

Answer would depend on the way you want to replace... Easier if you want replace any char in set with selected char:
$Name = -join (180..190|%{[char]$_})
New-Item -ItemType File -Name $Name
Get-ChildItem * | Rename-Item -NewName {
[regex]::Replace(
$_.Name,
'[\xB4-\xBE]',
} -WhatIf
But if you want it more complicated, you may do that too. E.g. defining hashtable that can be used to replace individual elements:
$Replacer = @{}
foreach ($Char in (180..190 | % { [char]$_ })) {
$Replacer.Add(
[string]$Char,
(echo _, -, =, . | Get-Random)
$Replacer
Get-ChildItem * | Rename-Item -NewName {
[regex]::Replace(
$_.Name,
'[\xB4-\xBE]',
$Replacer[$args[0].Value]
} -WhatIf
Using this syntax make it possible to include some logic in replace. E.g. you could easily use switch to decide what to do with given string:
Get-ChildItem * | Rename-Item -NewName {
[regex]::Replace(
$_.Name,
'[\xB4-\xBE]',
switch ($args[0].Value) {
º { "0" }
µ { "u" }
¹ { "1" }
¸ { "," }
Default { "_" }
} -WhatIf