Initial data commit

Task/Generic-swap/D/generic-swap.d

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+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);
+}