private/Utilities.ps1
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### ### Utilities functions ### function Get-MaxArray { <# .SYNOPSIS Return the max array of a two-dimension array (of potentially different lengths). .PARAMETER TwoDimensionsArray The two-dimension array from which to compute the max array. .OUTPUTS The max array. #> param ( [Parameter(Mandatory)] [AllowEmptyCollection()] [int[][]] $TwoDimensionsArray ) # Init a max array $max = @() # Iterate over the first level of the array $TwoDimensionsArray | ForEach-Object { # Get number of elements in current array $count = $_.Count # Add elements in the max array if needed if ($max.Count -lt $count) { ($max.Count)..($count - 1) | ForEach-Object { $max += [int]::MinValue } } # Compute max array for ($i = 0; $i -lt $count ; $i++) { if ($max[$i] -lt $_[$i]) { $max[$i] = $_[$i] } } } # Return the max array $max } function Confirm-ValidPrefixes { <# .SYNOPSIS Valid that an array of prefixes is valid. .PARAMETER Prefixes The prefixes to validate. .PARAMETER PrefixesCount The number of prefixes the array should contain. Throw an exception when false. .PARAMETER SameLength Switch indicating all prefixes must have the same (non-0) length. .OUTPUTS When the SameLength switch is set, if the prefixes array is valid, returns the common length of the prefixes in the array. #> param ( [AllowEmptyCollection()] [string[]] $Prefixes, [Parameter(Mandatory)] [int] $PrefixesCount, [switch] $SameLength ) # Validate prefixes count $invalidPrefixes = $null -eq $Prefixes $invalidPrefixes = $invalidPrefixes -or @($Prefixes | Where-Object { $_ }).Count -ne @($Prefixes).Count $invalidPrefixes = $invalidPrefixes -or @($Prefixes).Count -ne $PrefixesCount if ($invalidPrefixes) { throw "Invalid number of prefixes provided (expected = $PrefixesCount)" } # Validate prefixes are all of the same length if ($SameLength) { $prefixesLength = @($Prefixes | Where-Object { $_ } | ForEach-Object { $_.Length } | Select-Object -Unique) if ($prefixesLength.Count -gt 1) { throw "Prefixes must all have the same length" } # Return the prefixes length else { $prefixesLength[0] } } } |