连续两个以上的流？

Question

我无法连续两个流在node.js中工作。请参阅以下代码：

var Stream = require('stream');

var stream1 = new Stream;
stream1.readable = true;

var stream2 = new Stream;
stream2.readable = stream2.writable = true;

var stream3 = new Stream;
stream3.readable = stream3.writeable = true;

var i = 0;

stream2.write = function(data){this.emit('data', data)};
stream3.write = function(data){this.emit('data', data)};

setInterval((function() {
stream1.emit('data', String(i++));
}), 100);

//works:
stream1.pipe(stream2).pipe(process.stdout);

//does not work - why???
//stream1.pipe(stream2).pipe(stream3).pipe(process.stdout);

如何连续使用两个流？

Answer 1

你会觉得非常愚蠢，这是一个拼写错误：

stream2.readable = stream2.writable = true;
stream3.readable = stream3.writeable = true;  

查看差异，e中的额外stream3.writable。

Answer 2

尝试async（或来自nmpjs.com） - 最流行的Node.js模块，用于处理带有示例和wiki的异步JavaScript。