Debounced callback

gistfile1.js

// Debouce a callback
var debounce = (function () {
  // Save the previously used callbacks and timers
  var cbs = [],
      timers = [];

  // When debounce is called, they're calling this function
  return function (delay, cb) {
    // Find or store this callback
    var cbIndex = cbs.indexOf(cb);
    if (cbIndex === -1) {
      cbIndex = cbs.push(cb);
    }

    // When the event fires, this function is called
    return function () {
      // Save the arguments
      var args = [].slice.call(arguments);
      // Clear any current timers and start a new one
      clearTimeout(timers[cbIndex]);
      timers[cbIndex] = setTimeout(function () {
        cb.apply(this, args);
      }.bind(this), delay);
    };
  };
}());