Programming FlashCards - Learn Coding Concepts

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React Memo

React.memo is a higher-order component that prevents unnecessary re-renders by memoizing functional components with the same props.

React

React Context API

Efficiently manage and share global state across multiple components without prop drilling using React's built-in Context mechanism

Python

Python Walrus Operator

Assignment expression (:=) that allows assignment and evaluation in a single line, useful for reducing code complexity and improving readability.

Python

Random Seed

Learn how to set a random seed in Python to generate reproducible random numbers for testing and debugging purposes.

Python

Python Random Numbers

Learn how to generate random numbers in Python using the random module, including random integers, floating-point numbers, and making random selections.

Python

List Comprehension

A concise way to create lists in Python by combining a for loop and conditional logic in a single line of code.

Python

List Comprehension Magic

Create new lists by applying an expression to each item in an iterable, with optional filtering in a single, readable line of code.

Python

Generator Expressions

Memory-efficient way to create iterators in Python, similar to list comprehensions but generating values on-the-fly instead of storing entire sequence in memory.

Python

Decorators

Powerful Python feature that allows modifying or enhancing functions without directly changing their source code, using @ syntax to wrap functions

Python

Decorators Basics

Decorators are a powerful way to modify or enhance functions without changing their source code, allowing for metaprogramming in Python.

Python

Context Managers

Context managers handle resource setup and teardown, ensuring proper management of resources like files, network connections, and locks using the 'with' statement

PostgreSQL

Window Functions

PostgreSQL window functions perform calculations across a set of rows related to the current row, enabling advanced analytics without reducing result rows.

PostgreSQL

Table Inheritance

PostgreSQL supports table inheritance, allowing child tables to automatically inherit columns and constraints from a parent table, enabling hierarchical data modeling.

PostgreSQL

Lateral Joins

PostgreSQL's LATERAL JOIN allows subqueries in FROM clause to reference columns from preceding tables, enabling more complex and dynamic query structures.

PostgreSQL

JSONB Operators

Powerful JSON manipulation operators in PostgreSQL that allow efficient querying, updating, and extracting data from JSONB columns with advanced filtering.

PostgreSQL

JSONB Indexing

Learn how to create efficient indexes on JSONB columns to speed up queries on JSON data in PostgreSQL

PostgreSQL

JSONB Column Type

PostgreSQL's JSONB data type allows storing JSON data with efficient indexing and querying capabilities, supporting complex nested structures.

PostgreSQL

CTE Recursion

Common Table Expressions (CTEs) in PostgreSQL support recursive queries, enabling complex hierarchical data traversal like organizational structures or tree-like data.

PHP

PHP Trait Composition

Traits allow horizontal code reuse in PHP, enabling multiple trait inclusion in a single class to share methods across different class hierarchies.

PHP

PHP Null Coalescing

Quickly provide default values for potentially undefined variables using the ?? operator in PHP

PHP

PHP Generators

Memory-efficient way to create iterators using yield keyword, allowing lazy evaluation of large datasets without loading entire collection into memory

PHP

PHP Closure Binding

Use Closure::bind() to dynamically change the scope and $this context of an anonymous function at runtime

PHP

PHP array_map()

Transform array elements by applying a callback function to each element, creating a new array with modified values.

Node.js

Worker Threads

Node.js Worker Threads allow CPU-intensive tasks to run in parallel, preventing blocking of the main event loop and improving performance for computationally heavy operations.

Node.js

Streams Processing

Node.js streams allow efficient handling of reading/writing data in chunks, reducing memory usage for large files or data streams.

Node.js

Streams Piping

Efficiently transfer data between readable and writable streams using pipe() method, reducing memory usage for large files or data processing.

Node.js

Stream Piping

Node.js streams allow efficient data transfer between sources and destinations, reducing memory usage by processing data in chunks.

Node.js

Event Loop

Node.js uses a single-threaded event loop to handle asynchronous operations efficiently, allowing non-blocking I/O without creating multiple threads.

Node.js

Event Loop Basics

Understand how Node.js handles asynchronous operations using a single-threaded event loop, enabling non-blocking I/O and concurrent processing.

Node.js

Async Await Promise

Simplify promise-based asynchronous code using async/await syntax, making it look and behave more like synchronous code.

Node.js

Async Await Basics

Learn how to use async/await for cleaner, more readable asynchronous code in Node.js, avoiding callback hell and simplifying promise handling.

MySQL

MySQL Window Functions

Learn how to use window functions to perform calculations across a set of table rows that are related to the current row

MySQL

MySQL Subquery

A subquery is a nested query within another SQL query, allowing complex data retrieval by using the result of an inner query as a condition for the outer query.

MySQL

MySQL Prepared Statements

Prepared statements help prevent SQL injection and improve performance by precompiling SQL queries with parameter placeholders.

MySQL

MySQL JOIN Types

Understand different types of JOIN operations in MySQL to combine rows from two or more tables based on a related column between them.

MySQL

MySQL Indexes

Indexes improve query performance by creating a data structure that allows faster data retrieval, reducing the need to scan entire tables for specific records.

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