Yuliia Shtohryn JulkaIII-zz

Primitive Types & Reference Types in JavaScript

An explanation of JavaScript's pass-by-value, which is unlike pass-by-reference from other languages.

JavaScript has 2 kinds of variable types: primitive and reference.
A fixed amount of memory is reserved after creation of every variable.
When a variable is copied, it's in-memory value is copied.
Passing a variable to a function via a call also creates a copy of that variable.

	// tools
	import React from "react"
	import styled from "styled-components"

	// styles
	const Dots = styled.span`
	&::after {
	display: inline-block;
	animation: ellipsis 1.25s infinite;
	content: ".";

	function generateAlphabets() {
	var alphabets = [];
	var start = 'A'.charCodeAt(0);
	var last = 'Z'.charCodeAt(0);
	for (var i = start; i <= last; ++i) {
	alphabets.push(String.fromCharCode(i));
	}

	return alphabets.join('');
	}

	<Form
	mutators={{
	generateAccessCode: (args, state, utils) => {
	utils.changeValue(state, fieldNames.USERS_ACCESS_CODE, () => generateRandomCode());
	},
	}}
	component={AddUserForm}
	...
	>

	const validate = async (values) => {
	try {
	await usersValidationSchema.validate(values, { abortEarly: false });
	} catch (err) {
	const errors = err.inner.reduce(
	(formError, innerError) => ({
	...formError,
	[innerError.path]: innerError.message,
	}),
	{},

	<button type="button" name="groups" onClick={handleSorting}>
	<KeyboardArrowDown />
	</button>



	const handleSorting = (e) => {
	e.preventDefault();
	const { name } = e.currentTarget;
	setUsersList(orderBy([name], [order], usersList));

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	<style id="jsbin-css">
	body {

	display: grid;