Another update from ingydotnet^djgoku

Task/Identity-matrix/PowerShell/identity-matrix-1.psh

@@ -0,0 +1,21 @@
+function id($n) {
+    if($n -gt 0) {
+        $array = @(1..$n | foreach{ @(0) })
+        0..($n-1) | foreach{
+            $i = $_
+            $array[$i] = @(switch(0..($n-1)){
+                $i {1}
+                default {0}
+            })
+        }
+        $array
+    } else { @() }
+}
+function show($a) {
+    if($a.Count -gt 0) {
+        $n = $a.Count - 1
+        0..$n | foreach{ "$($a[$_][0..$n])" }
+    }
+}
+$array = id 4
+show $array

Task/Identity-matrix/PowerShell/identity-matrix-2.psh

@@ -0,0 +1,2 @@
+$array[0][0]
+$array[0][1]