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JavaScript Bitwise Hacks

It assumes the highest positive signed 32-bit float value for numbers. In other words, 2147483647 (or 0x7FFFFFFF or 2^31-1).

Table of Contents

1. Toggle switch
2. Variable swap
3. Math.pow
4. Determine if an integer is a power of 2
5. Round up to the next highest power of 2

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CSS Properties grouping order

The useful technique for CSS styling... This technique eliminates the need to spend your time for searching properties in alphabethical order

Why?

• CSS-properties are composed by the role each of them provides, not in alphabethical order (famous wrong practices);

• You haven't to waste your time finding CSS property in an alphabethical garbage;

• So, your eyes don't work a needless job.

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// ArrayScript...or as I would have nothing to do

let testSuite = [
    'Awesome',
    'epic fail',
    'remember,remember',
    'to be or not to be...',
    'DealerPoint is awesome...',
    'The best code is the one that doesn`t exist...',
    'Whatever the mind can conceive and believe, the mind can achieve. — Napoleon Hill',

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Value	Operator	Description	Example
19	( )	Expression grouping	(3 + 4)
18	.	Member	person.name
18	[]	Member	person["name"]
17	()	Function call	myFunction()
17	new	Create	new Date()
16	++	Postfix Increment	i++
16	--	Postfix Decrement	i--
15	++	Prefix Increment	++i

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Member in object

Check whether a certain method or property (typically an entry point into using the API or other feature you are detecting for) exists in its parent Object

Check if a certain property exists on a global object (such as window or navigator)

if("geolocation" in navigator) { ... }

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defaults:

• npm config set init-author-name ""
• npm config set init-author-url ""
• npm config set init-author-email ""
• npm config set init-license "ISC"
• npm config set init-version "1.0.0"

custom (example)

• npm config set init-author-name "Tierney Cyren"
• npm config set init-author-url "https://bnb.im"

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Про токены, JSON Web Tokens (JWT), аутентификацию и авторизацию. Token-Based Authentication

Last major update: 25.08.2020

• Что такое авторизация/аутентификация
• Где хранить токены
• Как ставить куки ?
• Процесс логина
• Процесс рефреш токенов
• Кража токенов/Механизм контроля токенов

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License	Permissions	Consequences	Features	Use Cases
Apache License 2.0	Allows commercial use, modification, distribution, patent use, private use	Must include license and copyright notice, state changes	Patent license, trademark use prohibited	Large-scale, commercial software projects
GNU GPL v3.0	Allows commercial use, modification, distribution, patent use, private use	Must disclose source, include license and copyright notice, state changes, same license	Strong copyleft, patent license, anti-circumvention provision	Free software projects, ensuring derivative works remain open source
MIT License	Allows commercial use, modification, distribution, private use	Must include license and copyright notice	Very permissive, short and simple	Small projects, libraries, or any software where you want minimal restrictions
BSD 2-Clause	Allows commercial use, modification, distribution, private use	Must in

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Pros of Default Exports:

1. Simple Syntax for Single Exports:

   • For files that export only one function, class, or object, default exports offer a simple and concise syntax: export default MyClass or export default myFunction().
   • This allows direct, clean import statements: import MyClass from './MyClass', reducing verbosity when working with a single, obvious export.

2. Convenient for Dynamic Imports:

   • Default exports integrate relatively cleanly with import() for dynamic imports, although there are naming challenges (see cons).

Cons and Downsides of Default Exports:

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Real-world App & Preferred Database

Real-World Application Type	Preferred Main Database	Reasoning
Blockchain Analytics	PostgreSQL	Requires strong ACID properties for integrity and detailed relational queries for analysis.
Chat/Messaging Application	MongoDB	Flexible schema for fast-changing message formats, handles high volumes of small, write-heavy data.
Content Management System (CMS)	MongoDB	Supports complex, nested document storage; handles unstructured or se