Ivanman ivankisyov

let message;
message = 'test';

let endsWithM = (<string>message).endsWith('m');

Learn Angular

import { FormsModule } from '@angular/forms';
...
// FormsModule  to the imports[]  array in your app.module.ts

Think about the code before writing it!

How to determine what this refers to:

1. Check where the function is being called! Then:

Is there a dot and an object preceding that dot. If yes, this will refer to that object
Is call or apply or bind used. If yes, this will refer to the first argument which was passed to those methods
Do you see the usage of the new keyword. If so, this will refer to the newly created object
Is this inside an arrow function. If yes, this will refer to the this of the parent function. Check the parent/enclosing scope
If none from above, this will refer to the global object. If in strict mode, this will be undefined

npm i --save-dev jest

In order to properly handle async code, you can use the following approaches:

use the done callback
return the promise(if any of course)
use async/await: make sure the callback that you're passing to the it/test function is "asynced"
- in order to test async code which should fail, you must use try/catch or switch to the second appoach listed here and use the catch method on the promise that had been rejected;

Expressions produce value

	// npm install those first
	const nock = require("nock");
	const axios = require("axios");

	nock("http://www.example.com")
	.post("/items")
	.reply(201, "user created");

	axios
	.post("http://www.example.com/items", {

	const axios = require("axios");

	const postTo = "https://jsonplaceholder.typicode.com/posts";
	const patchTo = "https://jsonplaceholder.typicode.com/posts/2"; // todo: make the patch endpoint dynamic

	const itemsToBePosted = [
	{ title: "foo", body: "bar", userId: 1 },
	{ title: "foo", body: "bar", userId: 2 },
	{ title: "foo", body: "bar", userId: 3 },
	{ title: "foo", body: "bar", userId: 4 }