cabana_fingerprint.js

cabana_fingerprint.js

const fs = require('fs');

const content = fs.readFileSync('./data.csv', 'utf8');
const data = content.trim()
    .split('\n')
    .filter(l => l)
    .map(l => l.split(','))
    .map(row => ({ time: row[0], id: row[1], bus: row[2], message: row[3] }))

const lengths = {};

data.forEach(row => {
    let length = row.message.replace(/0+$/, '').length;

    if (length % 2 === 1) {
        length++;
    }

    length = length / 2;

    if (!lengths[row.id]) {
        lengths[row.id] = 0;
    }

    if (length > lengths[row.id]) {
        lengths[row.id] = length;
    }
});

let fingerprint = Object.keys(lengths).map(id => {
    return `${id}L: ${lengths[id]}`;
});

console.log(fingerprint.join(', '));