使用单个事件桥接两个事件侦听器

Question

我试图“桥接”两个事件侦听器，以便通过一个事件触发它们。而且，在这个“链”中，我可以将更多的值作为参数传递给后面的听众。

我试图通过如下

var events = require('events'); 

var receiv = new events.EventEmitter(); 
var midl = new events.EventEmitter(); 

receiv.on("test", function() { 
    console.log("HERE", arguments); 
}); 

midl.on("test", receiv.on.bind(receiv, "test", "foo", "bar")); 

midl.emit("test", 123); 

然而，这种做法似乎的bug EventEmitter因为我收到以下错误

TypeError: listener must be a function 
    at TypeError (<anonymous>) 
    at EventEmitter.addListener (events.js:130:11) 
    at EventEmitter.emit (events.js:95:17) 
    at Object.<anonymous> (myEventTest.js:12:6) 
    at Module._compile (module.js:456:26) 
    at Object.Module._extensions..js (module.js:474:10) 
    at Module.load (module.js:356:32) 
    at Function.Module._load (module.js:312:12) 
    at Function.Module.runMain (module.js:497:10) 
    at startup (node.js:119:16) 

干杯来实现它。

P.S.我使用节点v0.10.5

Answer 1

对不起，我找到了解决办法。

var events = require('events'); 

var receiv = new events.EventEmitter(); 
var midl = new events.EventEmitter(); 

receiv.on("test", function() { 
    console.log("HERE", arguments); 
}); 

midl.on("test", receiv.emit.bind(receiv, "test", "foo", "bar")); 

midl.emit("test", 123);