How to use the statuses.codes function in statuses

var deprecate = require('depd')('http-errors')
var setPrototypeOf = require('setprototypeof')
var statuses = require('statuses')
var inherits = require('inherits')
var toIdentifier = require('toidentifier')

/**
 * Module exports.
 * @public
 */

module.exports = createError
module.exports.HttpError = createHttpErrorConstructor()

// Populate exports for all constructors
populateConstructorExports(module.exports, statuses.codes, module.exports.HttpError)

/**
 * Get the code class of a status code.
 * @private
 */

function codeClass (status) {
  return Number(String(status).charAt(0) + '00')
}

/**
 * Create a new HTTP Error.
 *
 * @returns {Error}
 * @public
 */

// add properties to generic error
    err.expose = status < 500
    err.status = err.statusCode = status
  }

  for (var key in props) {
    if (key !== 'status' && key !== 'statusCode') {
      err[key] = props[key]
    }
  }

  return err;
};

// create generic error objects
var codes = statuses.codes.filter(function (num) {
  return num >= 400;
});

codes.forEach(function (code) {
  var name = toIdentifier(statuses[code])
  var className = name.match(/Error$/) ? name : name + 'Error'

  if (code >= 500) {
    var ServerError = function ServerError(msg) {
      var self = new Error(msg != null ? msg : statuses[code])
      Error.captureStackTrace(self, ServerError)
      self.__proto__ = ServerError.prototype
      Object.defineProperty(self, 'name', {
        enumerable: false,
        configurable: true,
        value: className,

var deprecate = require('depd')('http-errors')
var setPrototypeOf = require('setprototypeof')
var statuses = require('statuses')
var inherits = require('inherits')

/**
 * Module exports.
 * @public
 */

module.exports = createError
module.exports.HttpError = createHttpErrorConstructor()

// Populate exports for all constructors
populateConstructorExports(module.exports, statuses.codes, module.exports.HttpError)

/**
 * Get the code class of a status code.
 * @private
 */

function codeClass (status) {
  return Number(String(status).charAt(0) + '00')
}

/**
 * Create a new HTTP Error.
 *
 * @returns {Error}
 * @public
 */

Object.keys(codes).forEach((code) => {
        const message = codes[code];
        const status = Number(code);

        // populate properties
        statuses[status] = message;
        statuses[message] = status;
        statuses[message.toLowerCase()] = status;

        // add to array
        statuses.codes.push(status);
    });
}

const statuses = require('statuses')

const names = {}
const messages = {}
const table = {}

/**
 * Generate code to error and name to error mapping.
 *
 * Error have three fields
 *   * name
 *   * message
 *   * status
 */
statuses.codes.forEach((code) => {
  const prefix = String(code).charAt(0)
  if (prefix === '4' || prefix === '5') {
    const name = toIdentifier(statuses[code])
    names[code] = name
    messages[code] = statuses[code]
    table[name] = {
      name,
      message: statuses[code],
      status: code
    }
  }
})

// generate error classes

/**

*/

var setPrototypeOf = require('setprototypeof')
var statuses = require('statuses')
var inherits = require('inherits')

/**
 * Module exports.
 * @public
 */

module.exports = createError
module.exports.HttpError = createHttpErrorConstructor()

// Populate exports for all constructors
populateConstructorExports(module.exports, statuses.codes, module.exports.HttpError)

/**
 * Create a new HTTP Error.
 *
 * @returns {Error}
 * @public
 */

function createError () {
  // so much arity going on ~_~
  var err
  var msg
  var status = 500
  var props = {}
  for (var i = 0; i < arguments.length; i++) {
    var arg = arguments[i]

var deprecate = require('depd')('http-errors')
var setPrototypeOf = require('setprototypeof')
var statuses = require('statuses')
var inherits = require('inherits')
var toIdentifier = require('toidentifier')

/**
 * Module exports.
 * @public
 */

module.exports = createError
module.exports.HttpError = createHttpErrorConstructor()

// Populate exports for all constructors
populateConstructorExports(module.exports, statuses.codes, module.exports.HttpError)

/**
 * Get the code class of a status code.
 * @private
 */

function codeClass (status) {
  return Number(String(status).charAt(0) + '00')
}

/**
 * Create a new HTTP Error.
 *
 * @returns {Error}
 * @public
 */

// add properties to generic error
    err.expose = status < 500
    err.status = err.statusCode = status
  }

  for (var key in props) {
    if (key !== 'status' && key !== 'statusCode') {
      err[key] = props[key]
    }
  }

  return err;
};

// create generic error objects
var codes = statuses.codes.filter(function (num) {
  return num >= 400;
});

codes.forEach(function (code) {
  var name = toIdentifier(statuses[code])
  var className = name.match(/Error$/) ? name : name + 'Error'

  if (code >= 500) {
    var ServerError = function ServerError(msg) {
      var self = new Error(msg != null ? msg : statuses[code])
      Error.captureStackTrace(self, ServerError)
      self.__proto__ = ServerError.prototype
      Object.defineProperty(self, 'name', {
        enumerable: false,
        configurable: true,
        value: className,

var deprecate = require('depd')('http-errors')
var setPrototypeOf = require('setprototypeof')
var statuses = require('statuses')
var inherits = require('inherits')

/**
 * Module exports.
 * @public
 */

module.exports = createError
module.exports.HttpError = createHttpErrorConstructor()

// Populate exports for all constructors
populateConstructorExports(module.exports, statuses.codes, module.exports.HttpError)

/**
 * Get the code class of a status code.
 * @private
 */

function codeClass (status) {
  return Number(String(status).charAt(0) + '00')
}

/**
 * Create a new HTTP Error.
 *
 * @returns {Error}
 * @public
 */

// add properties to generic error
    err.expose = status < 500
    err.status = err.statusCode = status
  }

  for (var key in props) {
    if (key !== 'status' && key !== 'statusCode') {
      err[key] = props[key]
    }
  }

  return err;
};

// create generic error objects
var codes = statuses.codes.filter(function (num) {
  return num >= 400;
});

codes.forEach(function (code) {
  var name = toIdentifier(statuses[code])
  var className = name.match(/Error$/) ? name : name + 'Error'

  if (code >= 500) {
    var ServerError = function ServerError(msg) {
      var self = new Error(msg != null ? msg : statuses[code])
      Error.captureStackTrace(self, ServerError)
      self.__proto__ = ServerError.prototype
      Object.defineProperty(self, 'name', {
        enumerable: false,
        configurable: true,
        value: className,