underscore mixin for repeatly calls the function

underscore.repeat.js

  _.mixin({
    repeat: function(func, times, delay, context) {
      delay = delay || 100;
      context = context || this;
      var intervalId = setInterval(function() {
        func.apply(context);
        if (--times < 1)
          clearInterval(intervalId);
      }, delay);
    }
  });