Q2561. What is the difference between for loop and forEach?
Both are used to iterate over arrays, but they differ in performance, flexibility, and purpose. The `for` loop is a core JavaScript statement that gives you full control ...
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Q2562. What are Symbols and what are their use cases?
Symbol is a primitive data type introduced in ES6 that creates unique and immutable values. Each Symbol value is guaranteed to be unique, even if they have the same descr...
Q2563. What is the difference between Object.create() and Object.assign()?
`Object.create()` and `Object.assign()` serve completely different purposes: **Object.create()** creates a new object with a specified prototype: ```javascript const prot...
Q2564. What are generator functions and how do they work?
Generator functions are special functions that can pause execution and resume later, allowing them to produce a sequence of values over time instead of computing them all...
Q2565. What is the Reflect API and when should you use it?
The Reflect API is a built-in object that provides methods for interceptable JavaScript operations. It mirrors many Object methods but with some improvements. ```javascri...
Q2566. How does JavaScript handle floating point precision issues?
JavaScript uses IEEE 754 double-precision (64-bit) floating-point format, which can cause precision issues with decimal numbers. ```javascript console.log(0.1 + 0.2); // ...
Q2567. What are tagged template literals and their practical uses?
Tagged template literals allow you to parse template literals with a function, giving you full control over the interpolation process. ```javascript function tag(strings,...
Q2568. What is the difference between Object.keys(), Object.values(), and Object.entries()?
These three methods extract different parts of an object's own enumerable properties: ```javascript const person = { name: 'John', age: 30, city: 'New York' }; // Object....
Q2569. What is the Intl.NumberFormat API and how is it used?
The `Intl.NumberFormat` API provides language-sensitive number formatting, allowing you to format numbers according to locale-specific conventions. ```javascript // Basic...
Q2570. How do you implement method chaining in JavaScript?
Method chaining is a pattern where multiple methods are called on the same object sequentially by returning `this` from each method. ```javascript class Calculator { cons...