Converts the copied text of 'http://www.aip.net.nz/pdf/AD_1.3.pdf' into a usable aerodromes object

runner.js

const readline = require("readline");
const fs = require("fs");

const reader = readline.createInterface({
  input: fs.createReadStream("./aerolist.txt"),
  output: process.stdout,
  console: false
});

let index = 0;
let result = {};
let placeholder = "";

reader.on("line", line => {
  if (index === 0) placeholder = line;
  if (index === 1) {
    const code = line.slice(0, 4);
    result[code] = placeholder;
  }
  if (index === 2) {
    index = 0;
    return;
  }
  index++;
});

reader.on("close", () => {
  console.log("result :", result);
  fs.writeFileSync("./result.json", result);
});