const fs = require("fs"); const readline = require("readline"); const args = process.argv.slice(2); if (!args.length) { console.error("must supply file name"); process.exit(1); } const fname = args[0]; const readInterface = readline.createInterface({ input: fs.createReadStream(fname), console: false, }); readInterface.on("line", (line) => { const fields = line.split(/\s+/); if (+fields[fields.length - 1] > 6) { console.log(line); } });