file system

File system in nutshull

we talk about modules last sections ..let's talk now about the Fs module and its important rule

How to use it

const fs = require('fs');

now we will learn to read the content of the file

assume that there is a file name is file.txt contain "hello world"

we gonna use a method called readFileSync

const fs = require('fs');
const fileContent = fs.readFileSync('./file.txt');
console.log(fileContent);

here is the result

NOTE: it return it in binary form

we will add s paramter in the method to be readable for us

const fs = require('fs');
const fileContent = fs.readFileSync('./file.txt','utf-8');
console.log(fileContent);

after running the file it will return hello world

let's try readFile method

const fs = require('fs');
fs.readFile('./file.txt','utf-8',(error,data)=>{
if(error){
    console.log(error);
}else{
    console.log(data);
}
});

Now write some words in file !!

const fs = require('fs');
fs.writeFileSync('./file2.txt','OSC are geeks');
console.log(fileContent);

file2 will be created and it will be contained the content above

const fs = require('fs');
fs.writeFile('./file.txt',"weeeeeeehh",{flag:'a'},(err)=>{
if(err){
    console.log(err);
}else{
    console.log("File written");
}
});

it's more preferable to use readFile ,writeFile methods

Question time ..........Why are they perferabel ??? ;)