A-M baby

Task/Map-range/JavaScript/map-range-2.js

@@ -0,0 +1,19 @@
+var mapRange = function(from, to, s) {
+  // mapRange expects ranges generated by _.range
+  var a1 = from[0];
+  var a2 = from[from.length - 1];
+  var b1 = to[0];
+  var b2 = to[to.length - 1];
+  return b1 + (s - a1) * (b2 - b1) / (a2 - a1);
+};
+
+// The range function is exclusive
+var fromRange = _.range(0, 11);
+var toRange = _.range(-1, 1);
+
+// .map constructs a new array
+fromRange = fromRange.map(function(s) {
+  return mapRange(fromRange, toRange, s);
+});
+
+console.log(fromRange);