Initial data commit

Task/Loop-over-multiple-arrays-simultaneously/D/loop-over-multiple-arrays-simultaneously-1.d

@@ -0,0 +1,6 @@
+import std.stdio, std.range;
+
+void main () {
+    foreach (a, b, c; zip("abc", "ABC", [1, 2, 3]))
+        writeln(a, b, c);
+}

Task/Loop-over-multiple-arrays-simultaneously/D/loop-over-multiple-arrays-simultaneously-2.d

@@ -0,0 +1,21 @@
+import std.stdio, std.range;
+
+void main () {
+    auto a1 = [1, 2];
+    auto a2 = [1, 2, 3];
+    alias StoppingPolicy sp;
+
+    // Stops when the shortest range is exhausted
+    foreach (p; zip(sp.shortest, a1, a2))
+        writeln(p.tupleof);
+    writeln();
+
+    // Stops when the longest range is exhausted
+    foreach (p; zip(sp.longest, a1, a2))
+        writeln(p.tupleof);
+    writeln();
+
+    // Requires that all ranges are equal
+    foreach (p; zip(sp.requireSameLength, a1, a2))
+        writeln(p.tupleof);
+}

Task/Loop-over-multiple-arrays-simultaneously/D/loop-over-multiple-arrays-simultaneously-3.d

@@ -0,0 +1,15 @@
+import std.stdio, std.range;
+
+void main() {
+    auto arr1 = [1, 2, 3, 4, 5];
+    auto arr2 = [6, 7, 8, 9, 10];
+
+    foreach (ref a, ref b; lockstep(arr1, arr2))
+        a += b;
+
+    assert(arr1 == [7, 9, 11, 13, 15]);
+
+    // Lockstep also supports iteration with an index variable
+    foreach (index, a, b; lockstep(arr1, arr2))
+        writefln("Index %s:  a = %s, b = %s", index, a, b);
+}

Task/Loop-over-multiple-arrays-simultaneously/D/loop-over-multiple-arrays-simultaneously-4.d

@@ -0,0 +1,10 @@
+import std.stdio, std.algorithm;
+
+void main () {
+    auto s1 = "abc";
+    auto s2 = "ABC";
+    auto a1 = [1, 2];
+
+    foreach (i; 0 .. min(s1.length, s2.length, a1.length))
+        writeln(s1[i], s2[i], a1[i]);
+}