node檔案流的讀取與寫入

1、檔案流寫入

const fs = require("fs");

const ws = fs.createwritestream("test.txt",);
for(let i = 0;i < 10000;i++),(err)=>);
}ws.end();//標記檔案寫入完成
ws.on("open",()=>)
ws.on("ready",()=>)
ws.on("close",()=>);
ws.on("error",()=>);

const fs = require("fs");

const rs = fs.createreadstream("test.txt",);//建立讀取檔案入口
let str = "";
rs.on("data",(chunk)=>);
rs.on("open",()=>).on("ready",()=>).on("end",()=>).on("error",()=>);

const fs = require("fs");

const rs = fs.createreadstream("test.txt");
const ws = fs.createwritestream("testcopy.txt",);
rs.on("data",(chunk)=>);
rs.on("close",()=>).on("error",()=>);
ws.on("close",()=>);

rs.pipe(ws);

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