vkarpov15

const Archetype = require('archetype');
// `Str` is a utility type for strings unrelated
// to archetype: https://www.npmjs.com/package/string
// It provides several convenient string utilities,
// including `.capitalize()`.
const Str = require('string');

const NameType = new Archetype({
  // Archetype custom types are trivial: any function,
  // including any class, is a viable `$type`.

vkarpov15

const Archetype = require('archetype');

const CustomerType = new Archetype({
  roles: {
    $type: ['string'],
    $enum: ['CUSTOMER', 'ADMIN'],
    $required: true,
    $default: ['CUSTOMER']
  },
  email: {

vkarpov15

const Archetype = require('archetype');
const assert = require('assert');

// The 2nd param to the `$validate` function is the schema path,
// so `{ $type: 'number', ... }`. Can use that to configure
// validators from your schema path, like writing your own
// min/max validator
const minMax = (v, path) => {
  const { $min, $max } = path;
  assert.ok($min == null || v >= $min, `${v} < ${$min}`);

vkarpov15

const Archetype = require('archetype');

const UserType = new Archetype({
  name: { $type: 'string' },
  age: { $type: 'number' }
}).compile('UserType');

// Prints 'age: Could not cast "not a number" to number'
throwError().catch(error => console.error(error.message));

vkarpov15

const Archetype = require('archetype');

const UserType = new Archetype({
  name: { $type: 'string', $required: true },
  age: { $type: 'number', $required: true }
}).compile('UserType');

const RequestType = new Archetype({
  createdAt: { $type: Date },
  user: {

vkarpov15

Express Gateway and Amazon API Gateway are two different products for configuring middleware servers that provide services like rate limiting, authentication, and proxying. This page will help you understand the major tradeoffs between using Amazon API Gateway and Express Gateway across several important dimensions.

Pricing

Express Gateway is an open source software project, so the software is free, but you are responsible for hosting and running your Express Gateway server. The cost of hosting an Express Gateway server may vary depending on your

vkarpov15

const Archetype = require('archetype');

// `UserType` has 3 required properties
const UserType = new Archetype({
  name: { $type: 'string', $required: true },
  email: { $type: 'string', $required: true },
  age: { $type: 'number', $required: true }
}).compile('UserType');

// But what if we want an `update()` function that updates a user?

vkarpov15

const Archetype = require('archetype');

const UserBaseType = new Archetype({
  name: {
    first: {
      $type: 'string',
      $required: true
    },
    last: {
      $type: 'string',

vkarpov15

const Archetype = require('archetype');

// Generic product type, because prices are specific to each store
const ProductType = new Archetype({
  name: {
    $type: 'string',
    $required: true
  }
}).compile('ProductType');

vkarpov15

class MyPromise {
  constructor(executor) {
    if (typeof executor !== 'function') {
      throw new Error('Executor must be a function');
    }

    // Internal state. `$state` is the state of the promise, and `$chained` is
    // an array of the functions we need to call once this promise is settled.
    this.$state = 'PENDING';
    this.$chained = [];