Data commit

Task/Map-range/D/map-range.d

@@ -0,0 +1,13 @@
+double mapRange(in double[] a, in double[] b, in double s)
+pure nothrow @nogc {
+    return b[0] + ((s - a[0]) * (b[1] - b[0]) / (a[1] - a[0]));
+}
+
+void main() {
+    import std.stdio;
+
+    immutable r1 = [0.0, 10.0];
+    immutable r2 = [-1.0, 0.0];
+    foreach (immutable s; 0 .. 11)
+        writefln("%2d maps to %5.2f", s, mapRange(r1, r2, s));
+}