Strings.js

// Copyright (c) 2015, Evan Summers (twitter.com/evanxsummers)
// ISC license, see http://github.com/evanx/redexutil/LICENSE

const logger = Loggers.create(__filename, 'info');

export function formatEmpty(string, defaultString) {
  if (string) {
    return string;
  } else {
    return defaultString || '';
  }
}

export function formatNullable(string) { // deprecated
  return formatEmpty(string);
}

export function padLeftZero(value, length) {
  let string = value.toString();
  while (string.length < length) {
    string = '0' + string;
  }
  return string;
}

export function joinColon() { // deprecated
  return Array.prototype.slice.call(arguments).join(':');
}

export function extractRegex(string, regex) {
  if (string) {
    let match = string.match(regex);
    if (match && match.length > 1) {
      return match[1];
    }
  }
}