nodejs 之 StringDecoder module

//StringDecoder将buffer转换成字符串，
//它为buffer.toString()提供一个简单的接口
//并支持utf8编码

var StringDecoder = require('string_decoder').StringDecoder;//实例化
var decoder = new StringDecoder();  //默认utf8编码

var cent = new Buffer([0xC2,0xA2]);
console.log(decoder.write(cent)); //

var euro = new Buffer([0xE2,0x82,0xAC]);
console.log(decoder.write(euro));