30-seconds-of-code/snippets/readFileLines.md

title, tags

title	tags
readFileLines	node,array,string,beginner

Returns an array of lines from the specified file.

• Use readFileSync function in fs node package to create a Buffer from a file.
• Convert buffer to string using toString(encoding) function.
• Use split(\n) to create an array of lines from the contents of the file.

const fs = require('fs');
const readFileLines = filename =>
  fs
    .readFileSync(filename)
    .toString('UTF8')
    .split('\n');

/*
contents of test.txt :
  line1
  line2
  line3
  ___________________________
*/
let arr = readFileLines('test.txt');
console.log(arr); // ['line1', 'line2', 'line3']