配列の順序はそのままで重複削除する

前提

• 二次元配列の順序を維持したい
• ソートはしたくない

$test = @( 
		( "a","b","c","d" ),
		( "e","b","i","d" ),
		( "g","b","j","d" ),
		( "h","b","k","d" )
	)

for ( $cnt = 0; $cnt -lt $test.Length - 1; $cnt++ ){
	for ( $i = 1 + $cnt; $i -lt $test.Length; $i++ ){
		for ( $j = ( $test[$i].length - 1 ); $j -ge 0; $j-- ){
			if ( ( $test[$cnt] -match $test[$i][$j] ).length -ge 1 ){
				$test[$i][$j] = ""
			}
		}
	}
}
$test

出力結果

a
b
c
d
e

i

g

j

h

k