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 .PARAMETER NumString A string or string array to test to determine if they are numeric. Aliased as 'Number' .PARAMETER IncludeInput Switch to include the input parameters in the output .EXAMPLE Test-IsNumeric '1.2' True .EXAMPLE Test-IsCapsLock -Verbose #> [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments','')] [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 ([ordered] @{Input="$n";Result=$false}) } else { Write-Output -InputObject $false } } else { try { [double] $tmp = 0 + $n if ($IncludeInput) { New-Object -TypeName psobject -Property ([ordered] @{Input="$n";Result=$true}) } else { Write-Output -InputObject $true } } catch { if ($IncludeInput) { New-Object -TypeName psobject -Property ([ordered] @{Input="$n";Result=$false}) } else { Write-Output -InputObject $false } } } } } end { Write-Verbose -Message "Ending [$($MyInvocation.Mycommand)]" } } #EndFunction Test-IsNumeric |