Generic swap: Difference between revisions

<lang d>import std.algorithm: swap; // from Phobos standard library

// The D solution uses templates and it's similar to the C++ one:

void mySwap(T)(ref T left, ref T right) {

auto temp = left;

left = right;

right = temp;

}

void main() {

import std.stdio;

int[] a = [10, 20];

writeln(a);

// The std.algorithm standard library module

// contains a generic swap:

swap(a[0], a[1]);

writeln(a);

// Using mySwap:

mySwap(a[0], a[1]);

writeln(a);

{{out}}

<pre>[10, 20]

[20, 10]

[10, 20]</pre>