Functions/Get-CommonSuffix.ps1
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function Get-CommonSuffix { <# .SYNOPSIS Find the common suffix of two strings. .DESCRIPTION This function will get the common suffix of two strings; that is, all the letters that they share, starting from the end of the strings. .EXAMPLE Get-CommonSuffix 'Morning' 'Lasting' Will get the common suffix of both string. Should output 'ing'. .LINK https://communary.wordpress.com/ https://github.com/gravejester/Communary.PASM .INPUTS System.String .OUTPUTS System.String .NOTES Author: Øyvind Kallstad Date: 03.11.2014 Version 1.1 Dependencies: Get-CommonPrefix #> [CmdletBinding()] param( [Parameter(Mandatory = $true, Position = 0)] [ValidateNotNullOrEmpty()] [string]$String1, [Parameter(Mandatory = $true, Position = 1)] [ValidateNotNullOrEmpty()] [string]$String2, # Maximum length of the returned suffix. [Parameter()] [int]$MaxSuffixLength, # Makes matches case-sensitive. By default, matches are not case-sensitive. [Parameter()] [switch] $CaseSensitive ) if (-not($CaseSensitive)) { $String1 = $String1.ToLowerInvariant() $String2 = $String2.ToLowerInvariant() } $shortestStringLength = [Math]::Min($String1.Length,$String2.Length) # Let the maximum prefix length be the same as the length of the shortest of # the two input strings, unless defined by the MaxPrefixLength parameter. if (($shortestStringLength -lt $MaxSuffixLength) -or ($MaxSuffixLength -eq 0)) { $MaxSuffixLength = $shortestStringLength } $tmp = Get-CommonPrefix ($String1[-1..-($String1.Length)] -join '') ($String2[-1..-($String2.Length)] -join '') -MaxPrefixLength $MaxSuffixLength -CaseSensitive:$CaseSensitive Write-Output ($tmp[-1..-($tmp.Length)] -join '') } |