index.js

const fs = require('fs')

const charset = 'utf-8'
const eol = '\n'
const tab = ' '

const inputs = [
    'inputs/a_example.in',
    'inputs/b_small.in',
    'inputs/c_medium.in',
    'inputs/d_quite_big.in',
    'inputs/e_also_big.in'
]

function chunkToLines(input) {
    const lines = input.split(eol)
    lines.pop()
    return lines
}

function chunkToNumbers(line) {
    return line.split(tab).map(Number)
}

function parse(file) {
    const input = fs.readFileSync(file, charset)
    const lines = chunkToLines(input)
    const [maxCapacity, populationCount] = chunkToNumbers(lines.shift())
    const weights = chunkToNumbers(lines.shift())
    return {
        maxCapacity, populationCount, weights
    }
}

function solve({ maxCapacity = 0, populationCount = 0, weights = [] }) {
    console.log(`solving with maxCapacity=${
        maxCapacity
    } and populationCount=${
        populationCount
    }`)
}

function run() {
    for (const input of inputs) {
        console.log(solve(parse(input)))
    }
}

run()