A-M baby

Task/Forward-difference/D/forward-difference-2.d

@@ -0,0 +1,13 @@
+import std.stdio, std.algorithm, std.range, std.array;
+
+auto forwardDifference(Range)(Range d, in int level) {
+    foreach (_; 0 .. level)
+        d = zip(d[1 .. $], d).map!q{ a[0] - a[1] }().array();
+    return d;
+}
+
+void main() {
+    auto data = [90.5, 47, 58, 29, 22, 32, 55, 5, 55, 73.5];
+    foreach (level; 0 .. data.length)
+        writeln(forwardDifference(data, level));
+}