Data commit

Task/Leap-year/D/leap-year-1.d

@@ -0,0 +1,13 @@
+import std.algorithm;
+
+bool leapYear(in uint y) pure nothrow {
+    return (y % 4) == 0 && (y % 100 || (y % 400) == 0);
+}
+
+void main() {
+    auto good = [1600, 1660, 1724, 1788, 1848, 1912, 1972, 2032,
+                 2092, 2156, 2220, 2280, 2344, 2348];
+    auto bad =  [1698, 1699, 1700, 1750, 1800, 1810, 1900, 1901,
+                 1973, 2100, 2107, 2200, 2203, 2289];
+    assert(filter!leapYear(bad ~ good).equal(good));
+}

Task/Leap-year/D/leap-year-2.d

@@ -0,0 +1,8 @@
+import std.datetime;
+
+void main() {
+    assert(yearIsLeapYear(1724));
+    assert(!yearIsLeapYear(1973));
+    assert(!Date(1900, 1, 1).isLeapYear);
+    assert(DateTime(2000, 1, 1).isLeapYear);
+}