How to return an array of lines from a file in node.js ?
In this article, we will return an array of lines from a specified file using node.js. The fs module is used to deal with the file system in node.js and to read file data we use fs.readFileSync( ) or fs.readFile( ) methods. Here we will use the readFileSync method to read the file, and we use the steps below to return the lines of the file in an array:
- Read the data of the file using the fs.readFileSync method, you will get a Buffer
- Convert the Buffer into a string Using the toString( ) method
- Now use the String.split() method to break the data and the delimiter should be “\n”
Below is the Example in which we are implementing the above steps:
Javascript
// Requiring the fs module const fs = require( "fs" ) // Creating a function which takes a file as input const readFileLines = filename => fs .readFileSync(filename) .toString( 'UTF8' ) .split( '\n' ); // Driver code let arr = readFileLines( 'gfg.txt' ); // Print the array console.log(arr); |
Text file: The gfg.txt file.
w3wiki A computer Science Portal for Beginner
Run the code using the command:
node index.js
Output:
[ 'w3wiki', 'A computer Science Portal for Beginner' ]
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