ClickerMonkey

// when T is any|unknown, Y is returned, otherwise N
type IsAnyUnknown<T, Y, N> = unknown extends T ? Y : N;
  
// when T is never, Y is returned, otherwise N
type IsNever<T, Y = true, N = false> = [T] extends [never] ? Y : N;

// when T is a tuple, Y is returned, otherwise N
// valid tuples = [string], [string, boolean], 
// invalid tuples = [], string[], (string | number)[]

ivanbtrujillo

interface User {
  id: number;
  name: string;
}


// Objects

We are going to change the name of the user. We will have three functions:
- changeName1 : mutates the object. Bad practice because mutations are a source of bugs hard to find.

ddialar

import { orm } from '@orm';
// Other needed imports and operations...

describe('Block description', () => {
    // Type error restoring the mock (mocking strategy #1)...
    test('whatever test description.', async (done) => {
        // Creating the spyOn...
        jest.spyOn(orm.controllers, 'enableUserAccount')
        // Mocking the function...
        orm.controllers.enableUserAccount = jest

karol-majewski

/**
 * TypeScript version of @istarkov's cancellable Promise wrapper.
 *
 * @see https://github.com/facebook/react/issues/5465#issuecomment-157888325
 */
const makeCancelable = <T>(promise: Promise<T>): { promise: Promise<T>; cancel(): void } => {
  let hasCanceled = false;

  const wrappedPromise = new Promise<T>((resolve, reject) => {
    promise.then(

mitchell-garcia

/**
 * Static vuex typings copied from ones included in node_modules.
 *
 * We need to do this in order to get typings for this.$store in components.
 * Once this Feature is added, we can remove this + the custom mapping in tsconfig.json
 * https://github.com/vuejs/vuex/issues/994
 */
import Vue, { WatchOptions } from 'vue';

type Dictionary<T> = { [key: string]: T };

alfonsomunozpomer

// https://github.com/alfonsomunozpomer/react-fetch-mock

import React from 'react'
import fetchMock from 'fetch-mock'
import Enzyme from 'enzyme'
import {shallow, mount, render} from 'enzyme'
import Adapter from 'enzyme-adapter-react-16'

Enzyme.configure({ adapter: new Adapter() })