writable stream echo 将可写流转换为在处理后发出写入数据的转换流

可写流回声将可写流转换为在处理后重新发送写入数据的转换流。安装这个模块是通过npm安装的： $ npm install writable-stream-echo测试可以通过执行以下命令来运行测试： $ grunt test示例用法var WritableStreamEcho = require ( 'writable-stream-echo' ) ; var StreamArray = require ( 'stream-array' ) , var WritableCounter = require ( 'writable-counter' ) ; var stdout = require ( 'stdout' ) ; var stream = StreamArray ( [ 'A' , 'B' , 'C' ] ) ; var counter = Writable