/**
 * Returns a function that, as long as it continues to be invoked, will not
 * be triggered. The function will be called after it stops being called for
 * N milliseconds.
 *
 * @param  {Function} fn
 * @param  {Number}   wait In milliseconds.
 * @return {Function}
 */
Showcase.debounce = function (fn, wait) {
	var timeout;
	return function () {
		clearTimeout(timeout);
		var that = this, args = arguments;
		timeout = setTimeout(function () {
			fn.apply(that, args);
		}, wait);
	};
};

/**
 * Returns a function that will fire every N milliseconds at most.
 *
 * @param {Function} fn
 * @param {Number}   threshold
 */
Showcase.throttle = function (fn, threshhold) {
	var last, deferTimer;
	return function () {
		var that = this, args = arguments, now = new Date().getTime();
		if (last && now < last + threshhold) {
			clearTimeout(deferTimer);
			deferTimer = setTimeout(function () {
				last = now;
				fn.apply(that, args);
			}, threshhold);
		} else {
			last = now;
			fn.apply(that, args);
		}
	};
};