Unit Sorting in Javascript

unit_sort.js

#!/usr/bin/env node

var fs = require('fs')

var matches = []

process.argv.slice(2).forEach((filename) => {
    try {
        var content = fs.readFileSync(filename)
        var lines = content.toString().split(/\r\n|\n/)

        lines.forEach((line) => {
            var match = line.match(/^#?(\d+)([^ ]*) - /)
            if(match) {
                matches.push(match)
            } else if(line.replace(/\s+/, '') !== '') {
                console.warn('Error:', "Unrecognized line format: " + line)
            }
        })
    } catch(error) {
        if(error.code === 'ENOENT' || error.code === 'EACCES') {
            console.warn('Error:', "Can't open: " + filename)
        } else {
            console.warn('Error:', error)
        }
    }
})

matches.sort((a, b) => {
    var comparison = parseFloat(a[1]) - parseFloat(b[1])

    if(comparison === 0) {
        comparison =  a[2].toLowerCase().localeCompare(b[2].toLowerCase())
    }

    return comparison
})

matches.forEach((match) => { console.log(match.input) })