Power

Powershell get a list of matches from the pipeline.ps1

function h1 {
    param([string]$Label)
    "`n#### $label ####`n"
}

$regex = '^(.+?)([^\.]*)$'
$regex_named = '^(?<name>.+?)(?<ext>[^\.]*)$'

h1 "inputs:"
Get-ChildItem c: -File
    | where { $_.Name -match $regex } | select Name

h1 "un-named capture groups"
$regex
Get-ChildItem c: -File | ForEach-Object {
    if($_.Name -match $regex ) {
        [pscustomobject]$matches
    }
} | Format-Table

h1 "named with 0 removed"
$regex_named
Get-ChildItem 'c:' -File | ForEach-Object {
    if($_.Name -match $regex_named ) {
        $matches.Remove(0)
        [pscustomobject]$matches
    }
} | Format-Table