Data commit

Task/Forward-difference/PowerShell/forward-difference.psh

@@ -0,0 +1,22 @@
+function Forward-Difference( [UInt64] $n, [Array] $f )
+{
+	$flen = $f.length
+	if( $flen -gt [Math]::Max( 1, $n ) )
+	{
+		0..( $flen - $n - 1 ) | ForEach-Object {
+			$l=0;
+			for( $k = 0; $k -le $n; $k++ )
+			{
+				$j = 1
+				for( $i = 1; $i -le $k; $i++ )
+				{
+					$j *= ( ( $n - $k + $i ) / $i )
+				}
+				$l += $j * ( 1 - 2 * ( ( $n - $k ) % 2 ) ) * $f[ $_ + $k ]
+			}
+			$l
+		}
+	}
+}
+
+Forward-Difference 2 1,2,4,5