Add Create An Array Containing 1 To N as a javascript til.

README.md

@@ -99,6 +99,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 ### javascript
 
 - [Character Codes from Keyboard Listeners](javascript/character-codes-from-keyboard-listeners.md)
+- [Create An Array Containing 1 To N](javascript/create-an-array-containing-1-to-n.md)
 - [Splat Arguments To A Function](javascript/splat-arguments-to-a-function.md)
 - [Throttling A Function Call](javascript/throttling-a-function-call.md)
 - [Truthiness of Integer Arrays](javascript/truthiness-of-integer-arrays.md)

javascript/create-an-array-containing-1-to-n.md

@@ -0,0 +1,35 @@
+# Create An Array Containing 1 To N
+
+Some languages, such as Ruby, have a built in range constraint that makes it
+easy to construct an array of values from 1 to N. JavaScript is not one of
+those languages. Nevertheless, if you don't mind the aesthetics, you can get
+away with something like this:
+
+```javascript
+> Array.apply(null, {length: 10}).map(Number.call, Number);
+=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+```
+
+That gives us `0` through `9`. To get `1` through `10`, we can tweak it
+slightly:
+
+```javascript
+> Array.apply(null, {length: 10}).map(Number.call, function(n) {
+    return Number(n) + 1;
+  });
+=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+```
+
+To generalize this, we can replace `10` with `N` and then just expect that
+`N` will be defined somewhere:
+
+```javascript
+> var N = 10;
+=> undefined
+> Array.apply(null, {length: N}).map(Number.call, function(n) {
+    return Number(n) + 1;
+  });
+=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+```
+
+[Source](http://stackoverflow.com/a/20066663/535590)