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Rajesh Kumar Yadav
Rajesh Kumar Yadav Subscriber

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Node.js : Determining the line count of a text file

Create a new file as app.js and paste below code -

app.js



const readline = require('readline');
const fs = require('fs');
var file = 'path.to.file';
var linesCount = 0;
var rl = readline.createInterface({
 input: fs.createReadStream(file),
 output: process.stdout,
 terminal: false
});
rl.on('line', function (line) {
 linesCount++; // on each linebreak, add +1 to 'linesCount'
});
rl.on('close', function () {
 console.log(linesCount); // print the result when the 'close' event is called
});


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Run below command -



node app.js


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You will get the line count of text file.

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