Jaouad Ballat jaouadballat

Everything I Know About UI Routing

Definitions

Location - The location of the application. Usually just a URL, but the location can contain multiple pieces of information that can be used by an app
1. pathname - The "file/directory" portion of the URL, like invoices/123
2. search - The stuff after ? in a URL like /assignments?showGrades=1.
3. query - A parsed version of search, usually an object but not a standard browser feature.
4. hash - The # portion of the URL. This is not available to servers in request.url so its client only. By default it means which part of the page the user should be scrolled to, but developers use it for various things.
5. state - Object associated with a location. Think of it like a hidden URL query. It's state you want to keep with a specific location, but you don't want it to be visible in the URL.

Interview Questions

Node.js

Q1: What do you mean by Asynchronous API? ☆☆

Answer: All APIs of Node.js library are aynchronous that is non-blocking. It essentially means a Node.js based server never waits for a API to return data. Server moves to next API after calling it and a notification mechanism of Events of Node.js helps server to get response from the previous API call.

Source: tutorialspoint.com

Deep JavaScript Foundations v3

Types

Primitive types

In JavaScript, everything is NOT an object. ECMAScript language types are:

Undefined
Boolean
String

	<?php

	namespace App\Shop\Base;

	use App\Shop\Base\Interfaces\BaseRepositoryInterface;
	use Illuminate\Database\Eloquent\Model;
	use Illuminate\Database\Eloquent\ModelNotFoundException;
	use Illuminate\Pagination\LengthAwarePaginator;

	/**

	import { useState } from 'react';

	export function useCounter(initial = 0) {
	const [count, setCount] = useState(initial);

	return [count, () => setCount(count + 1)];
	}

	function omit(object, fields) {
	const shallowObject = Object.assign({}, object);
	if (typeof fields === Array) {
	fields.forEach(field => {
	if (!!shallowObject[field]) delete shallowObject[field];
	});
	return shallowObject;
	} else if (typeof fields === "string") return delete shallowObject[fields];
	else throw new Error(`fields ${fields} must be array or string`);
	}