Parse Patreon Members.csv file to output active patron's names (NodeJS)

parse-patreon-csv.js

const csv = require('csv-parser')
const fs = require('fs')
const patrons = [];

const GENEROUS_PLEDGE = 30;
const GENEROUS_LIFETIME = 200;

fs.createReadStream(process.argv[2])
  .pipe(csv())
  .on('data', (data) => patrons.push(data))
  .on('end', () => {
    const activePatrons = patrons
      .filter(patron => patron['Patron Status'] === "Active patron")
      .map(patron => {
        patron['Pledge $'] = parseInt(patron['Pledge $'].substr(1));
        patron['Lifetime $'] = parseInt(patron['Lifetime $'].substr(1));
        return patron;
      });

    console.log("**Generous backers:**")
    activePatrons
      .filter(patron => (
        patron['Pledge $'] >= GENEROUS_PLEDGE ||
        patron['Lifetime $'] >= GENEROUS_LIFETIME
      ))
      .forEach(patron => console.log(`- ${patron.Name}`))

    console.log("");
    console.log("**Backers:**")
    activePatrons
      .filter(patron => (
        patron['Pledge $'] < GENEROUS_PLEDGE &&
        patron['Lifetime $'] < GENEROUS_LIFETIME
      ))
      .forEach(patron => console.log(`- ${patron.Name}`))
  });