scripts/Merge-Hashtables.ps1
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function Merge-Hashtables { [CmdletBinding()] param ( #Identifies the first hashtable [Parameter(Position = 0, Mandatory = $true)] [hashtable]$First, #Identifies the second hashtable [Parameter(Position = 1, Mandatory = $true)] [hashtable]$Second ) function Set-Keys ($First, $Second) { @($First.Keys) | Where-Object { $Second.ContainsKey($_) } | ForEach-Object { $key = $_ if (($First.$_ -is [Hashtable]) -and ($Second.$_ -is [Hashtable])) { Set-Keys -First $First.$_ -Second $Second.$_ } elseif (($First.$_ -is [Collections.Generic.List[Object]]) -or ($First.$_ -is [object[]])) { $First.$_ += ($Second.$_ | Where-Object {$First.$key -notcontains $_}) } else { $First.$_ = $Second.$_ } } } function Add-Keys ($First, $Second) { @($Second.Keys) | ForEach-Object { if ($First.ContainsKey($_)) { if (($Second.$_ -is [Hashtable]) -and ($First.$_ -is [Hashtable])) { Add-Keys -First $First.$_ -Second $Second.$_ } } else { $First.Add($_, $Second.$_) } } } # Do not touch the original hashtables $firstClone = $First.Clone() $secondClone = $Second.Clone() # Bring modified keys from secondClone to firstClone Set-Keys -First $firstClone -Second $secondClone # Bring additional keys from secondClone to firstClone Add-Keys -First $firstClone -Second $secondClone # return firstClone $firstClone } |