JavaScript & TypeScript Interview Guide (In Progress)

Welcome to the JavaScript & TypeScript Interview Guide! This repository is curated to assist developers in preparing for interviews by covering core concepts, coding challenges, design patterns, and system design principles.

Table of Contents

1. JavaScript & TypeScript Core Concepts
2. Beginner Pattern Problems
3. Machine Round & Polyfills
4. Data Structures
5. Low-Level Design (LLD)
6. High-Level Design (HLD)

1. JavaScript & TypeScript Core Concepts

Folder: 01 - JavaScript & TypeScript Core Concepts

This section delves into fundamental concepts essential for mastering JavaScript and TypeScript.

JavaScript Core Concepts

• Arrow
• Closures
• Currying
• Generators
• Hoisting
• Iterators & Iterables
• NaN
• Rest vs Spread Operator
• Scope of variables
• Scope of this
• Undefined vs Null
• Automatic Semicolon Insertion

TypeScript Core Concepts

• TypeScript Types

2. Beginner Pattern Problems

Folder: 02 - Beginner Pattern Problems

Enhance your problem-solving skills with these pattern-based challenges.

Star Patterns

• Rectangle Star Pattern
• Half Diamond Star Pattern
• Diamond Star Pattern
• Star Pyramid
• Inverted Star Pyramid

Number Patterns

• Binary Number Triangle Pattern
• Number Crown Pattern
• Increasing Number Triangle Pattern
• Right-Angled Number Pyramid 01
• Right-Angled Number Pyramid 02
• Inverted Numbered Right Pyramid
• The Number Pattern

Alphabet Patterns

• Increasing Letter Triangle Pattern
• Reverse Letter Triangle Pattern
• Alpha Ramp Pattern
• Alpha Hill Pattern
• Alpha Triangle Pattern

Miscellaneous Patterns

• Symmetric Void Pattern
• Symmetric Butterfly Pattern
• Hollow Rectangle Pattern
• Right-Angled Triangle Pattern
• Inverted Right Pyramid

3. Machine Round & Polyfills

Folder: 03 - Machine Round & Polyfills

Prepare for machine coding rounds with these practical problems and polyfill implementations.

Function Binding and Invocation

• apply.js
• bind.js
• call.js
• callApplyBindTogether.js

Function Utilities

• InfiniteCurry.js
• MemorizeFunction.js
• curryPlaceholder.js
• currying.js
• oncePolyfiles.js

Functional Programming

• debounce.js
• throttle.js

Polyfills

• PromisePolyfill.js
• filterPolyfils.js
• mapPolyfils.js
• reducePolyfils.js
• setIntervalPolyfill.js

Object and Prototype Manipulation

• Mixin.js
• deepFreeze.js
• deepSeal.js
• proxy.js

Data Conversion and Manipulation

• CSVToJSON.js
• Number To Binary.js
• flattenAnArray.js
• reverseNumber.js
• reverseStr.js

Asynchronous Control

• circuitBreaker.js
• fetchWithTimeout.js
• limitConcurrency.js
• rateLimiter.js

Utility Functions

• cacheApiCall.js
• customCookie.js
• deepFilter.js
• groubBy.js
• removeCircularDependancy.js

Below Sections Are In Progress

Once completed, the README file will be updated. Currently, you may encounter some inaccuracies.

4. Data Structures

Folder: 04 - Data Structures

Explore problems focused on various data structures.

• Arrays
• Linked Lists
• Stacks
• Queues
• Trees
• Graphs
• Hash Maps
• Sorting Algorithms
• Searching Algorithms

5. Low-Level Design (LLD)

Folder: 05 - Low-Level Design

Understand system design principles and implement design patterns.

TypeScript Design Patterns

⚙️ Design Patterns

Creational Patterns	Structural Patterns	Behavioral Patterns
Factory Method (Vehicle System)	Proxy Pattern (Secure Bank Account)	Null Object Pattern (Vehicle System)
Abstract Factory (Vehicle System)	Decorator Pattern (Vehicle System)	Chain of Responsibility (Logging System)
		Strategy Pattern (Vehicle System)