all tasks

Task/Sorting-algorithms-Merge-sort/PowerShell/sorting-algorithms-merge-sort.psh

@@ -0,0 +1,105 @@
+Function Merge-Array( [Object[]] $lhs, [Object[]] $rhs )
+{
+	$result = @()
+	$lhsl = $lhs.length
+	$rhsl = $rhs.length
+	if( $lhsl -gt 0 )
+	{
+		if( $rhsl -gt 0 )
+		{
+			$i = 0
+			for( $j = 0; ( $i -lt $lhsl ) -and ( $j -lt $rhsl ); )
+			{
+				if( $lhs[ $i ] -le $rhs[ $j ] )
+				{
+					$result += $lhs[ $i ]
+					[void] ( $i++ )
+				} else {
+					$result += $rhs[ $j ]
+					[void] ( $j++ )
+				}
+			}
+			if( $i -lt $lhsl )
+			{
+				$result += $lhs[ $i..( $lhsl - 1 ) ]
+			}
+			if( $j -lt $rhsl )
+			{
+				$result += $rhs[ $j..( $rhsl - 1 ) ]
+			}
+		} else {
+			for( $i = 0; $i -lt $lhsl; $i++ )
+			{
+				if( $rhs -le $lhs[ $i ] )
+				{
+					$result += $rhs
+					break
+				}
+				$result += $lhs[ $i ]
+			}
+			if( $i -lt $lhsl )
+			{
+				$result += $lhs[ $i..( $lhsl - 1 ) ]
+			}
+		}
+	} else {
+		if( $rhsl -gt 0 )
+		{
+			for( $i = 0; $i -lt $rhsl; $i++ )
+			{
+				if( $lhs -le $rhs[ $i ] )
+				{
+					$result += $lhs
+					break
+				}
+				$result += $rhs[ $i ]
+			}
+			if( $i -lt $rhsl )
+			{
+				$result += $rhs[ $i..( $rhsl - 1 ) ]
+			}
+		} else {
+			if( $lhs -lt $rhs )
+			{
+				$result += $lhs
+				$result += $rhs
+			} else {
+				$result += $rhs
+				$result += $lhs
+			}
+		}
+	}
+	$result
+}
+
+Function MergeSort( [Object[]] $data )
+{
+	$datal = $data.length - 1
+	if( $datal -gt 0 )
+	{
+		$middle = [Math]::Floor( $datal / 2 )
+		$left = @()
+		$left += MergeSort $data[ 0..$middle ]
+		$right = @()
+		$right += MergeSort $data[ ( $middle + 1 )..$datal ]
+		if( $left[ -1 ] -le $right[ 0 ] )
+		{
+			$result = @()
+			$result += $left
+			$result += $right
+			$result
+		} elseif( $right[ -1 ] -le $left[ 0 ] )
+		{
+			$result = @()
+			$result += $right
+			$result += $left
+			$result
+		} else {
+			Merge-Array $left $right
+		}
+	} else {
+		$data
+	}
+}
+
+$l = 100; MergeSort ( 1..$l | ForEach-Object { $Rand = New-Object Random }{ $Rand.Next( 0, $l - 1 ) } )