stackoverflow-sort1.js

// sort1 uses a straightforward approach, sorting the records in a in-memory array
//////////////////////////////////////////////////////////////////////////////////////

var fs = require('fs'),
    readline = require('readline'),
    stream = require('stream');

var start = Date.now();


var data = [];
var rl = readline.createInterface({
    input: fs.createReadStream('./input.txt'),
    terminal: false
});

rl.on('line', function (line) {
    data.push(line.split('\t'));
});

rl.on('close', function () {
    data.sort(function (a, b) {
        return a[2].localeCompare(b[2]);
    });

    var writer = fs.createWriteStream('out1.txt');
    data.forEach(line => writer.write(line.join('\t') + '\n'));
    writer.end();

    var closetime = Date.now();
    console.log('Time. ', (closetime - start) / 1000, ' secs');

});