Nodejs (four) character reading

console.log("ssss");
var fs=require("fs");
var re=fs.createReadStream("Test.txt",{highWaterMark:7});
re.setEncoding('utf8');
var texts="";
re.on("data",function(chunk){
   texts+=chunk;
 
});
re.on("end",function(){
    console.log(texts);
});
console.log("5555");

1. The compilation method is different when reading data , There will be garbled code ,re.setEncoding('utf8'); Specifying the encoding method can avoid problems

var fs=require("fs");
var re=fs.createReadStream("Test.txt",{highWaterMark:7});
 
var xxx=[];
var size=0;
re.on("data",function(chunk){
    xxx.push(chunk);
    size += chunk.length;
 
});
re.on("end",function(){
    var text=Buffer.concat(xxx,size);
    console.log(text.toString());
});
console.log("5555");

2. When reading data, you can cache it first , The final splicing