js事件编程的发布/订阅模式（一对一关系）

基于js事件编程的发布/订阅模式（一对一关系）

code

var PusbSub = {
subscribe: function(ev, callback) {
var calls = this._callbacks || (this._callbacks = {});
(this._callbacks[ev] || (this._callbacks[ev] = [])).push(callback);
return this;
},
publish: function() {
var args = Array.prototype.slice.call(arguments, 0);
var ev = args.shift();
var list, calls, i, l;
if (!(calls = this._callbacks)) {
return this;
}
if (!(list = this._callbacks[ev])) {
return this;
}
for (i = 0, l = list.length; i < l; i++) {
list[i].apply(this, args);
}
return this;
}
}

PusbSub.subscribe("wem", function() {
alert("wem");
});
PusbSub.publish("wem");

测试