Functions/Test-IsNumeric.ps1
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Function Test-IsNumeric { <# .SYNOPSIS Determines if specified string can be parsed to a number .DESCRIPTION Determines if specified string can be parsed to a number. Can specify a string, an array of strings, or input from the pipeline .EXAMPLE Test-IsNumeric '1.2' True .EXAMPLE Test-IsCapsLock -Verbose #> [CmdletBinding(ConfirmImpact='None')] [OutputType('bool')] Param ( [parameter(ValueFromPipeLine,ValueFromPipeLineByPropertyName)] [Alias('Number')] [string[]] $NumString, [switch] $IncludeInput ) Begin { Write-Verbose -Message "Starting $($MyInvocation.Mycommand)" } Process { foreach ($n in $NumString) { $n = $n.Trim() if (($n -eq '') -or ($null -eq $n)) { if ($IncludeInput) { new-object -TypeName psobject -Property @{Input="$n";Result=$false} } else { Write-Output -inputobject $false } } else { Try { 0 + $n | Out-Null if ($IncludeInput) { new-object -TypeName psobject -Property @{Input="$n";Result=$true} } else { Write-Output -inputobject $true } } Catch { if ($IncludeInput) { new-object -TypeName psobject -Property @{Input="$n";Result=$false} } else { Write-Output -inputobject $false } } } } } End { Write-Verbose -Message "Ending $($MyInvocation.Mycommand)" } } #EndFunction Test-IsNumeric |