Array average and range initialization

snippets/initialize-array-with-range.md

@@ -0,0 +1,9 @@
+### Initialize array with range
+
+Use `Array(end-start)` to create an array of the desired length, `map()` to fill with the desired values in a range.
+You can omit `start` to use a default value of `0`.
+
+```js
+var initializeArrayRange = (end, start = 0) =>
+  Array.apply(null, Array(end-start)).map( (v,i) => i + start );
+```