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Task/String-comparison/D/string-comparison.d

@@ -0,0 +1,23 @@
+import std.stdio, std.string, std.algorithm;
+
+void main() {
+    auto s = "abcd";
+
+    /* Comparing two strings for exact equality */
+    assert (s == "abcd"); // same object
+
+    /* Comparing two strings for inequality */
+    assert(s != "ABCD"); // different objects
+
+    /* Comparing the lexical order of two strings;
+    -1 means smaller, 0 means equal, 1 means larger */
+
+    assert(s.icmp("Bcde") == -1); // case insensitive
+    assert(s.cmp("Bcde") == 1); // case sensitive
+
+    assert(s.icmp("Aabc") == 1); // case insensitive
+    assert(s.cmp("Aabc") == 1); // case sensitive
+
+    assert(s.icmp("ABCD") == 0); // case insensitive
+    assert(s.cmp("ABCD") == 1); // case sensitive
+}