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Posts by category

• Category: AWS
  • AWS: Setup LAMP environment on Amazon Linux2
• Category: Data Structure
  • Data Structure: Breadth First Search(BFS)
  • Data Structure: Heap
  • Data Structure: Linked List
  • Data Structure: Doubly Linked List
  • Data Structure: Graph
  • Data Structure: Hash Table
  • Data Structure: Priority Queue
  • Data Structure: Binary Heap[Max & Min]
  • Data Structures
  • Data Structure: Binary Search Tree(BST)
  • Data Structure: Stack
  • Data Structure: Queue
  • Data Structure: Singly Linked List
• Category: Design Pattern
  • Design Pattern: Facade Pattern in Python
  • Design Pattern: Decorator Pattern in Python
  • Design Pattern: Composite Pattern in Python
  • Design Pattern: Bridge Pattern in Python
  • Design Pattern: Adapter Pattern in Python
  • Design Pattern: Prototype Pattern in Python
  • Design Pattern: Builder Pattern in Python
  • Design Pattern: Abstract Factory Pattern in Python
  • Design Pattern: Factory Pattern in Python
  • Design Pattern: Singleton Pattern in Python
  • Design Pattern: Visitor Pattern in PHP
  • Design Pattern: Template Method Pattern in PHP
  • Design Pattern: Strategy Pattern in PHP
  • Design Pattern: State Pattern in PHP
  • Design Pattern: Observer Pattern in PHP
  • Design Pattern: Memento Pattern in PHP
  • Design Pattern: Mediator Pattern in PHP
  • Design Pattern: Interpreter Pattern in PHP
  • Design Pattern: Iterator Pattern in PHP
  • Design Pattern: Command Pattern in PHP
  • Design Pattern: Chain of Responsibility Pattern in PHP
  • Design Pattern: State Pattern in Go
  • Design Pattern: Proxy Pattern in PHP
  • Design Pattern: Flyweight Pattern in PHP
  • Design Pattern: Facade Pattern in PHP
  • Design Pattern: Decorator Pattern in PHP
  • Design Pattern: Composite Pattern in PHP
  • Design Pattern: Bridge Pattern in PHP
  • Design Pattern: Adapter Pattern in PHP
  • Design Pattern: Prototype Pattern in PHP
  • Design Pattern: Builder Pattern in PHP
  • Design Pattern: Abstract Factory Pattern in PHP
  • Design Pattern: Factory Pattern in PHP
  • Design Pattern: Template Method Pattern in Go
  • Design Pattern: Visitor Pattern in Go
  • Design Pattern: Strategy Pattern in Go
  • Design Pattern: Visitor Pattern in TypeScript
  • Design Pattern: Template Method Pattern in TypeScript
  • Design Pattern: Strategy Pattern in TypeScript
  • Design Pattern: State Pattern in TypeScript
  • Design Pattern: Observer Pattern in TypeScript
  • Design Pattern: Observer Pattern in Go
  • Design Pattern: Memento Pattern in TypeScript
  • Design Pattern: Memento Pattern in Go
  • Design Pattern: Mediator Pattern in TypeScript
  • Design Pattern: Mediator Pattern in Go
  • Design Pattern: Iterator Pattern in TypeScript
  • Design Pattern: Iterator Pattern in Go
  • Design Pattern: Interpreter Pattern in TypeScript
  • Design Pattern: Interpreter Pattern in Go
  • Design Pattern: Command Pattern in TypeScript
  • Design Pattern: Command Pattern in Go
  • Design Pattern: Chain of Responsibility Pattern in TypeScript
  • Design Pattern: Chain of Responsibility Pattern in Go
  • Design Pattern: Proxy Pattern in Go
  • Design Pattern: Flyweight Pattern in Go
  • Design Pattern: Proxy Pattern in TypeScript
  • Design Pattern: Facade Pattern in Go
  • Design Pattern: Flyweight Pattern in TypeScript
  • Design Pattern: Facade Pattern in TypeScript
  • Design Pattern: Decorator Pattern in TypeScript
  • Design Pattern: Composite Pattern in TypeScript
  • Design Pattern: Decorator Pattern in Go
  • Design Pattern: Bridge Pattern in TypeScript
  • Design Pattern: Composite Pattern in Go
  • Design Pattern: Adapter Pattern in TypeScript
  • Design Pattern: Bridge Pattern in Go
  • Design Pattern: Adapter Pattern in Go
  • Design Pattern: Prototype Pattern in TypeScript
  • Design Pattern: Prototype Pattern in Go
  • Design Pattern: Builder Pattern in TypeScript
  • Design Pattern: Abstract Factory Pattern in Go
  • Design Pattern: Factory Pattern in Go
  • Design Pattern: Abstract Factory Pattern in TypeScript
  • Design Pattern: Builder Pattern in Go
  • Design Pattern: Factory Pattern in TypeScript
  • Design Pattern: Proxy Pattern in Java
  • Design Pattern: Prototype Pattern in Java
  • Design Pattern: Visitor Pattern
  • Design Pattern: Visitor Pattern in Java
  • Design Pattern: Template Method Pattern
  • Design Pattern: Template Method Pattern in Java
  • Design Pattern: State Pattern
  • Design Pattern: State Pattern in Java
  • Design Pattern: Observer Pattern
  • Design Pattern: Observer Pattern in Java
  • Design Pattern: Memento Pattern
  • Design Pattern: Memento Pattern in Java
  • Design Pattern: Mediator Pattern in Java
  • Design Pattern: Mediator Pattern
  • Design Pattern: Iterator Pattern
  • Design Pattern: Iterator Pattern in Java
  • Design Pattern: Interpreter Pattern
  • Design Pattern: Interpreter Pattern in Java
  • Design Pattern: Command Pattern in Java
  • Design Pattern: Command Pattern
  • Design Pattern: Chain of Responsibility Pattern in Java
  • Design Pattern: Chain of Responsibility Pattern
  • Design Pattern: Prototype Pattern
  • Design Pattern: Builder Pattern in Java
  • Design Pattern: Builder Pattern
  • Design Pattern: Abstract Factory Pattern in Java
  • Design Pattern: Bridge Pattern in Java
  • Design Pattern: Bridge Pattern
  • Design Pattern: Composite Pattern in Java
  • Design Pattern: Composite Pattern
  • Design Pattern: Strategy Pattern
  • Design Pattern: Decorator Pattern
  • Design Pattern: Decorator Pattern in Java
  • Design Pattern: Proxy Pattern
  • Design Pattern: Flyweight Pattern in Java
  • Design Pattern: Flyweight Pattern
  • Design Pattern: Facade Pattern in Java
  • Design Pattern: Facade Pattern
  • Design Pattern: Adapter Pattern in Java
  • Design Pattern: Adapter Pattern
  • Design Pattern: Strategy Pattern in Java
  • Design Pattern: Singleton Pattern in Go
  • Design Pattern: Singleton Pattern in PHP
  • Design Pattern: Singleton Pattern in TypeScript
  • Design Pattern: Factory Pattern in Java
  • Design Pattern: Singleton Pattern in Java
  • Design Pattern: Abstract Factory Pattern
  • Design Patterns [classic/core patterns for OOP]
  • Design Pattern: Factory Pattern
  • Design Pattern: Singleton Pattern
• Category: Design Principle
  • Design Principle: SOLID Principles
  • Design Principle: Dependency Inversion Principle(DIP)
  • Design Principle: Interface Segregation Principle(ISP)
  • Design Principle: Liskov Substitution Principle(LSP)
  • Design Principle: Open/Closed Principle(OCP)
  • Design Principle: Single Responsibility Principle(SRP)
  • Design Principle: Program to Interfaces, Not Implementations
  • Design Principle: Composition Over Inheritance(COI)
  • Design Principle: Encapsulate What Varies(EWV)
  • Design Principles
• Category: Docker
  • Docker: Configure Xdebug and Debug using IDE(VSCode, PHPStorm, etc.)
  • Docker: Image
  • Docker: Dockerfile
  • Docker: Dockerize Laravel Application
  • Docker: Architecture
  • Docker: Installation
  • Docker Tutorial
• Category: JavaScript
  • JavaScript: Data Types and Type Conversion
  • JavaScript: Pass by Value VS Pass by Reference
  • JavaScript: Hoisting [ variable and function ]
  • JavaScript: Variable Scope [ includes scope chain and const scope ]
  • JavaScript: Variable and Constant [ includes var vs let vs const ]
  • JavaScript: Tagged Template Literals
  • JavaScript Programming
  • JavaScript: Event Capturing and Bubbling [event propagation in detail]
  • JavaScript: “use strict” – [strict mode]
  • JavaScript: [Uncaught SyntaxError] Unexpected token o in JSON at position 1
  • JavaScript: this – [full explanation]
• Category: Laravel
  • Laravel: Interview Questions and Answers
  • Laravel: Save created_by, and updated_by User Information
  • Laravel: Installation and Directory Structure
  • Laravel: Maintenance Mode [proper usage with internal working]
  • Laravel Framework
  • Laravel: Repository Pattern [with Unit Test]
  • Laravel: Run Queue in the Background using PM2
  • Laravel: env() getting null value when used with config:cache
• Category: Linux
  • Linux: File System
  • Linux
• Category: Linux Command
  • Linux Command: Wildcards [Globbing]
  • Linux Command: Others [simple utility commands]
  • Linux Command: touch (create file)
  • Linux Command: tail (output last part of files)
  • Linux Command: Redirecting Input/Output Stream Flow
  • Linux Command: mv (move files and directories)
  • Linux Command: rm (remove files or directories)
  • Linux Command: man (system manual reference)
  • Linux Command: mkdir (create/make directory)
  • Linux Command: ls (list files and directories)
  • Linux Command: history (command execution history)
  • Linux Command: find (search for files)
  • Linux Command: cp (copy files and directories)
  • Linux Command: clear and reset (with clear left and right hotkeys)
  • Linux Command: Piping (output of one command, as input of another)
  • Linux Command: cd (change working directory)
  • Linux Command: Aliases(create command aliases or shortcuts)
  • Linux Commands
  • Linux Command: User and Group Management
  • Linux Command: Cheat Sheet
• Category: MongoDB
  • MongoDB Method: db.collection.aggregate()
  • MongoDB Method: db.collection.getIndexes()
  • MongoDB Method: db.collection.createIndex()
  • MongoDB Method: db.collection.deleteOne()
  • MongoDB Method: db.collection.updateMany()
  • MongoDB Method: db.collection.updateOne()
  • MongoDB Method: db.collection.insertMany()
  • MongoDB Method: db.collection.insertOne()
  • MongoDB Method: db.collection.findOne()
  • MongoDB Method: db.collection.find()
  • MongoDB: Client Library/Driver Connection Setup
  • MongoDB Tutorials
  • MongoDB: Installation
• Category: MSSQL
  • Configure Microsoft SQL Server using Docker and Azure data studio
• Category: MySQL
  • MySQL: JSON [Data Type]
  • MySQL: Error 1118 – Row size too large
  • MySQL Tutorials
  • MySQL: Error 1153 – Got a packet bigger than ‘max_allowed_packet’ bytes
  • MySQL: Pivot Table – Pivot Rows to Columns Dynamically
  • MySQL: Clone/Duplicate Table (with or without data)
  • MySQL: Find and Delete Duplicate Rows (for single/multiple columns)
  • MySQL: CAST any Data Type as INTEGER
  • MySQL: Check Database and Table Size
  • MySQL: Select Latest Record for Each Group
  • MySQL: Error 1045 – Access denied for user
• Category: Nginx
  • Nginx: Error 413 – Request Entity Too Large
• Category: NodeJS
  • Sequelize: Configure for any Framework
  • NodeJS: Send HTML email using EJS and Sendmail
  • Issue: node package (in windows) is not recognized as an internal or external command, operable program or batch file
• Category: PHP
  • PHP: Cast to Float
  • PHP: Cast to Integer
  • PHP: Type Casting
  • PHP: Variable
  • PHP: SplFixedArray
  • PHP: Interface vs Abstract Class vs Trait
  • PHP: Abstract Class and Method
  • PHP: Interfaces
  • PHP Programming
  • PHP: Traits
• Category: Python
  • Python class: enumerate [add counter to an iterable]
  • Python: Lambda Function
  • Python function: id() [get object identity]
  • Python: Boolean [Data Type]
  • Python: String Padding
  • Python: Decorator
  • Python: Access Control(attribute and method)
  • Python: Getter, Setter, and Deleter
  • Python: Float [Data Type] (includes Decimal and Complex Numbers)
  • Python: Class and Object
  • Python: Mathematical Operators
  • Python: Generator
  • Python: package
  • Python: Function
  • Python: if…else [Control Flow]
  • Python: Set [Data Type]
  • Python: Dictionary [Data Type]
  • Python: List [Data Type]
  • Python: Tuple [Data Type]
  • Python: Integer [Data Type]
  • Python: String [Data Type]
  • Python: Data Types
  • Python: Type Conversion
  • Python: Operators
  • Python: Variables and Scope
  • Python: Program Structure
  • Python: Interactive Mode
  • Python: Installation
  • Python: Hello World
  • Python function: print() [printing in Python]
  • Python Programming
• Category: Redis
  • Redis Command: GEOSEARCH
  • Redis Command: GEOPOS
  • Redis Command: GEOHASH
  • Redis Command: RPUSH
  • Redis Command: GEODIST
  • Redis Command: GEOADD
  • Redis Command: SREM
  • Redis Command: SMEMBERS
  • Redis Command: SADD
  • Redis Command: HINCRBY
  • Redis Command: HVALS
  • Redis Command: HKEYS
  • Redis Command: HGETALL
  • Redis Command: HGET
  • Redis Command: HSET
  • Redis Command: RESTORE
  • Redis Command: DUMP
  • Redis: Backup and Restore [ full DB and single key ]
  • Redis: Configuration [all important configs]
  • Redis Command: BLPOP
  • Redis Command: LTRIM
  • Redis Command: LREM
  • Redis Command: LSET
  • Redis Command: LPOP
  • Redis Command: LMPOP
  • Redis Command: LPOS
  • Redis Command: LINSERT
  • Redis Command: LLEN
  • Redis Command: LINDEX
  • Redis Command: LMOVE
  • Redis Command: LRANGE
  • Redis Command: LPUSH
  • Redis Command: STRLEN
  • Redis Command: GETRANGE
  • Redis Command: DECR
  • Redis Command: INCR
  • Redis Command: APPEND
  • Redis Command: MSETNX
  • Redis Command: MSET
  • Redis Command: GETDEL
  • Redis Command: GETEX
  • Redis Command: MGET
  • Redis Command: SET
  • Redis Command: GET
  • Redis Tutorials
  • Redis: Key Management
  • Redis: Access Control List(ACL) – [Complex Permission for Users]
  • Redis: Password Authentication(AUTH) [Default User]
  • Redis: Installation [Docker / Linux / MacOS / Windows]
• Category: Shell Scripting
  • Shell Scripting
• Category: Software Versioning
  • Semantic Versioning(SemVer)
• Category: SSE
  • Flask: Server-Sent Events(SSE) [in Python]
  • Go: Server-Sent Events(SSE)
  • Server-Sent Events(SSE) Tutorials
  • Server-Sent Events(SSE) Web(JS EventSource) Client
  • PHP: Server-Sent Events(SSE)
  • Server-Sent Events(SSE)
  • NodeJS: Server-Sent Events(SSE) using ExpressJS