gistfile1.js

set : function (key, val, trigger) {
  var i;

	if (typeof key === "string") {

		if (this.__data[key] !== val) {

			if (this['set_' + key]) {
				val = this['set_' + key](val);
			}

			else {
				this.__data[key] = val;
			}
		}

		else {
			trigger = false;
		}

		if (trigger !== false) {
			this.trigger('change-' + key, key, val);

			if (!this.__isChanging) {
				this.trigger('change', key, val);
			}
		}

		return val;
	}

	else {
		this.__isChanging = true;

		for (i in key) {
			this.set(i, key[i], val);
		}

		this.__isChanging = false;
		if (trigger !== false) {
			this.trigger('change', key);
		}
	}
},