CODE EXAMPLE FOR SHELL

array difference powershell

$Yellow   = [Int[]][Linq.Enumerable]::Except($a, $b)
$Blue     = [Int[]][Linq.Enumerable]::Except($b, $a)
$Green    = [Int[]][Linq.Enumerable]::Intersect($a, $b)
$NotGreen = [Int[]]([Linq.Enumerable]::Except($a, $b) + [Linq.Enumerable]::Except($b, $a))