Pure functions are self-contained code units that always return the same output given the same inputs, without relying on external state or modifying anything outside their scope. They make code more predictable, testable, and reusable, while avoiding common pitfalls like modifying external variables, network requests, and using Date or Math.random().
Anonymous functions are blocks of code that can be executed repeatedly without an explicit name assigned to them, used in scenarios like one-time use, event handling, and higher-order functions, allowing for more concise and efficient code.
ES6 introduced object method shorthand, allowing developers to define methods within objects using a concise syntax, making code more expressive and easier to maintain. This feature simplifies development, improves performance, and enhances readability, promoting consistency and reducing repetition.
Array literals are a shorthand way to create arrays in JavaScript using `[]`, offering concise syntax, efficient memory allocation, and flexibility, making them ideal for defining initial data, creating arrays from existing data, and dynamic array creation.
Package managers like npm and yarn simplify dependency management for JavaScript projects, ensuring all necessary libraries and modules are present, up-to-date, and compatible with each other, allowing developers to focus on writing code rather than resolving versioning issues.
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