tasks a-s

Task/Rot-13/D/rot-13-1.d

@@ -0,0 +1,12 @@
+import std.stdio;
+import std.ascii: letters, U = uppercase, L = lowercase;
+import std.string: makeTrans, translate;
+
+immutable r13 = makeTrans(letters,
+                          //U[13 .. $] ~ U[0 .. 13] ~
+                          U[13 .. U.length] ~ U[0 .. 13] ~
+                          L[13 .. L.length] ~ L[0 .. 13]);
+
+void main() {
+    writeln("This is the 1st test!".translate(r13, null));
+}

Task/Rot-13/D/rot-13-2.d

@@ -0,0 +1,21 @@
+import std.stdio, std.string, std.traits;
+
+pure S rot13(S)(in S s) if (isSomeString!S) {
+    return rot(s, 13);
+}
+
+pure S rot(S)(in S s, in int key) if (isSomeString!S) {
+    auto r = s.dup;
+
+    foreach (i, ref c; r) {
+        if ('a' <= c && c <= 'z')
+            c = ((c - 'a' + key) % 26 + 'a');
+        else if ('A' <= c && c <= 'Z')
+            c = ((c - 'A' + key) % 26 + 'A');
+    }
+    return cast(S) r;
+}
+
+void main() {
+    "Gur Dhvpx Oebja Sbk Whzcf Bire Gur Ynml Qbt!".rot13().writeln();
+}