Gumby.Math.psm1
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<#
.SYNOPSIS Checks whether a number is even. .PARAMETER n Number to check. .OUTPUTS True if the number is even, false otherwise. #> function IsEven([int] $n) { return $n % 2 -eq 0 } <# .SYNOPSIS Encode a number in a base-26 system using Latin uppercase letters as digits. .PARAMETER n Number to encode. .OUTPUTS Base-26 encoding of number. .EXAMPLE PS> EncodeBase26 0 A .EXAMPLE PS> EncodeBase26 25 Z .EXAMPLE PS> EncodeBase26 26 BA .EXAMPLE PS> EncodeBase26 77 CZ .EXAMPLE PS> EncodeBase26 1234 BVM #> function EncodeBase26($n) { function ToChar([int]$digit) { return [char](([int]'A'[0]) + $digit) } $base = 26 $remainder = $n $result = ""; while ($true) { $digit = $remainder % $base $remainder = ($remainder - $digit) / $base $result = (ToChar $digit) + $result if ($remainder -eq 0) {break} } return $result } <# .SYNOPSIS Generate a random string consisting of uppercase Latin letters. .PARAMETER Length Length of string to generate (defaults to 3). .OUTPUTS Random string. .EXAMPLE PS> GenerateRandomLetterId LGW .EXAMPLE PS> GenerateRandomLetterId -Length 1 T .EXAMPLE PS> GenerateRandomLetterId -Length 4 SZCW #> function GenerateRandomLetterId($Length = 3) { return (EncodeBase26 (Get-Random -Maximum ([math]::pow(26, $Length)))) } |