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concat-stream

类似于一个流的收集器，将读取的流全部存储于该容器

用法：pipe(concat((e)=>{}))

返回：形参为一个函数，该函数的参数为容器里的存储的buffer

const concat = require('concat-stream');const fs = require('fs');fs.createReadStream('./img/640593_0.gif').pipe(concat((buffer)=>{    fs.writeFile('./1.gif', buffer, (err)=>{        if(err){console.log(err)};    });    fs.writeFile('./1.txt', buffer.toString('base64'), (err)=>{        if(err){console.log(err)};    })}))

• 用write方法写入数组和Uint8Arrays

var write = concat(function(data) {    console.log(data)})write.write([1,2,3])write.write([4,5,6])write.end()

var write = concat(function(data) {})var a = new Uint8Array(3)a[0] = 97; a[1] = 98; a[2] = 99write.write(a)write.write('!')write.end(Buffer.from('!!1'))