kirilkirkov

import React, { useState, useEffect } from 'react';

function App() {
  const [count, setCount] = useState(0);

  // execute each time when click the button
  console.log(Math.random())

  useEffect(() => {
    // execute each time when click the button

kirilkirkov

<?php
define("CHATGPT_API_KEY", "your-key-goes-here");
 
$data = array(
  "model" => "text-davinci-003",
  "prompt" => "What is PHP and how it works?", // Your question or request
  "temperature" => 0.5,
  "max_tokens" => 500
);

kirilkirkov

/**
 * Make new class instance for each element
 */
class ClickOutSide {
  constructor() {
    this.outsideHandler = null
    this.element = null
    this.documentEvent = (evt) => {
      const flyoutEl = this.element
      let targetEl = evt.target // clicked same el

kirilkirkov

What is unit test?

Unit Tests are written from a programmers perspective. They are made to ensure that a particular method (or a unit) of a class performs a set of specific tasks.

What is feature test?

Functional Tests are written from the user's perspective. They ensure that the system is functioning as users are expecting it to.

kirilkirkov

JavaScript Strange Behaviors

• console.log(typeof NaN) // Number
• console.log(Math.min() > Math.max()) // TRUE
• console.log(9 - '1') // 8
• console.log(9 + '1') // 91
• console.log(Boolean(0.1 + 0.5 === 0.6)) // TRUE
• console.log(Boolean(0.1 + 0.2 === 0.2)) // FALSE
• console.log(! + []) // TRUE

kirilkirkov

Whats the difference between Streams and Buffer?

• Buffer is temporary placeholder in memory (ram/disk) on which data can be dumped and then processing can be done.
• Stream is a sequence of data elements. like when you typing something in your computer then when you press the keys it will form a data stream and then it goes to the processor for processing.

Stream can be processed through Buffer.

What are buffers and streams in REST API?

A buffer is a temporary memory that a stream takes to hold some data until it is consumed.

kirilkirkov

RUN - command triggers while we build the docker image.

CMD - command triggers while we launch the created docker image.

---

RUN EXPLAIN: RUN is an image build step, the state of the container after a RUN command will be committed to the container image. A Dockerfile can have many RUN steps that layer on top of one another to build the image. RUN: Commands May not Execute if Images are Cached.

kirilkirkov

What is the difference between node npm command line and npx command line?

These are two different cli tools as part of your nodejs installation. Their goal is to make our work with JavaScript packages easier. The main difference is that npm is the actual package manager, but npx is used to execute the JavaScript packages.

What is NPM?

NPM means Node Package Manager, this is the default package manager for nodejs. If you have installed nodejs in your machine, then you will have available npm in yours command line\cli (terminal, dos). It interact with the online

kirilkirkov

Lazy Loading Of Components

Lazy loading means to separate functionalities of the application in separate files. Eg. Modal window which is showing in the website, instead to load it everywhere in the website, we can load it only when needs.

Example:

// app.js

kirilkirkov

Did you know that instagram webview (when click some link from private message or post) , the window.opener is null?
This is privacy reason.. so if you wants to close window popups, should use history.back(); instead of window.close();, 
also the postMessage will not works with window.opener.postMessage ....