Updated strings/repeating.textile to an AWESOME string repeat idiom thanks to sstephensson on #coffeescript

Author: David Brady

chapters/strings/repeating.textile

@@ -10,32 +10,17 @@ You want to repeat a string.
 
 h2. Solution
 
-Use a map or a list comprehension, and flatten it:
+Create an array of n+1 nulls, and then join it with the repetition string as the glue:
 
 {% highlight coffeescript %}
-('foo' for dummy in [1..10]).join ''
-# => "foofoofoofoofoofoofoofoofoofoo"
-
-([1..10].map (x) -> 'foo').join ''
-# => "foofoofoofoofoofoofoofoofoofoo"
-{% endhighlight %}
-
-Or a simple (but stateful) loop:
+# create a string of 10 foos
+Array(11).join('foo')
 
-{% highlight coffeescript %}
-repeatString = (str, times) ->
-  s = ''
-  while times > 0
-    s += str
-    --times
-  s
-
-repeatString "foo", 10
 # => "foofoofoofoofoofoofoofoofoofoo"
 {% endhighlight %}
 
 h2. Discussion
 
-JavaScript lacks a string repeat function, as does CoffeeScript. List comprehensions can be pressed into service here, however it remains to be seen if this use is considered idiomatic.
+JavaScript lacks a string repeat function, as does CoffeeScript. List comprehensions and maps can be pressed into service here, but in the case of a simple string repeat it's easier to simply build an array of n+1 nulls and then glue them together.