jquery.reduce.js

/*
 * jquery.reduce.js
 * - 実行回数を間引くユーティリティ
 * - jQuery は名前空間を借りているだけ
 */
;(function (window, $, undefined) {
  $.extend({
    throttle: function(func, delay) {
      var context = null;
      var args = [];
      var timer = null;
      var _func = function() {
        timer = null;
        func.apply(context, args)
        context = null;
        args = [];
      };
      return function () {
        if (!timer) {
          context = this;
          args = arguments;
          timer = window.setTimeout(_func, delay);
        }
      };
    },
    debounce: function(func, delay) {
      var context = null;
      var args = [];
      var timer = null;
      var _func = function() {
        func.apply(context, args);
        context = null;
        args = [];
      };
      return function() {
        context = this;
        args = arguments;
        if (timer) {
          window.clearTimeout(timer);
        }
        timer = window.setTimeout(_func, delay);
      };
    }
  });
})(this, jQuery);