busseur/lib/utility.js

A TriMet CLI tool

const ANSI = /[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-PRZcf-nqry=><]/g;

function replaceAt(str, index, toInsert) {
  toInsert = String(toInsert);

  if (index > str.length - 1 || index < 0) { return str; }
  return str.slice(0, index) + toInsert + str.substr(index + toInsert.length);
}

function log() {
  console.log.apply(null, arguments);
}

function write(x) {
  process.stdout.write(x);
}

function die(code) {
  process.exit(code);
}

function mandatory(predicate, message) {
  if (!predicate) {
    console.error(message);
    process.exit(1);
  }
}

module.exports = {
  die: die,
  log: log,
  mandatory: mandatory,
  replaceAt: replaceAt,
  write: write
};