Create Function Sequence Piping js file

- MDN example to play with demonstrating using Array.prototype.reduce on
  a sequence of functions

Author: travisjupp

funcSeqPipe.js

@@ -0,0 +1,26 @@
+/* The pipe function takes a sequence of functions and
+ * returns a new function. When the new function is called
+ * with an argument, the sequence of functions are called in order, 
+ * which each one receiving the return value of the previous function.*/
+
+const pipe =
+  (...functions) =>
+  (initialValue) =>
+    functions.reduce((acc, fn) => fn(acc), initialValue);
+
+// Building blocks to use for composition
+const double = (x) => 2 * x;
+const triple = (x) => 3 * x;
+const quadruple = (x) => 4 * x;
+
+// Composed functions for multiplication of specific values
+const multiply6 = pipe(double, triple);
+const multiply9 = pipe(triple, triple);
+const multiply16 = pipe(quadruple, quadruple);
+const multiply24 = pipe(double, triple, quadruple);
+
+// Usage
+multiply6(6); // 36
+multiply9(9); // 81
+multiply16(16); // 256
+multiply24(10); // 240