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The arguments object in JavaScript is a function-specific local variable that provides access to the arguments passed to that function when it was called. However, it's important to note that the arguments object has some limitations and is generally considered less preferred in modern JavaScript for several reasons. Here's a breakdown of the arguments object: Availability: The arguments object is available within all non-arrow functions. Arrow functions do not have a built-in arguments object. Properties: The arguments object is array-like , meaning it has a length property (indicating the number of arguments passed) and allows indexing using numerical positions (similar to arrays). However, it does not have the full functionality of a true array and cannot be used with standard array methods like map or forEach. Limitations: Not a real array: As mentioned, the arguments object lacks the methods and behavior of a true array. Live collection: The arguments object is a live co...

The following are the common array methods in JavaScript that modify the original array instead of returning a new one: 1. pop():  Removes and returns the last element from an array. Example: myArray.pop(); 2. push():  Adds one or more elements to the end of an array and returns the new length of the array. Example: myArray.push(element1, element2); 3. shift():  Removes and returns the first element from an array. Example: myArray.shift(); 4. unshift():   Adds one or more elements to the beginning of an array and returns the new length of the array. Example: myArray.unshift(element1, element2); 5. splice():  This is a versatile method that can be used to: Remove elements from an array (splice(start, deleteCount)) Add elements to an array (splice(start, 0, element1, element2)) Replace elements in an array (splice(start, deleteCount, element1, element2)) Example: myArray.splice(2, 1); // Removes one element at index 2 myArray.splice(1, 0, 'newElement'); // Adds 'n...

Hoisting is a unique behavior in JavaScript where declarations of functions, variables, and classes appear to move to the top of their scope before any code is executed. This means you can use them even before they are declared in your code, leading to some interesting and sometimes confusing situations. Here's a breakdown of how hoisting works for different types of declarations: 1. Function Declarations: Function declarations are fully hoisted . This means the entire function definition, including its name, arguments, and body, is moved to the top of its scope. You can call a function before it's declared in your code. JavaScript // This will work correctly! myFunction(); function myFunction () {   console .log( "I am hoisted!" ); } 2. Variable Declarations with var: var declarations are partially hoisted . While the variable declaration itself is moved to the top of its scope, its value assignment remains where it is written . Therefore, accessing the variable be...

  JavaScript C oding Challenges: FizzBuzz:  Write  a program that prints the numbers from 1 to 100. But for multiples of three print "Fizz" instead of the number and for multiples of five print "Buzz". For numbers which are multiples of both three and five print "FizzBuzz". Reverse a String:  Write a program that reverses the order of the characters in a string. Find the Largest Number in an Array:   Write a function that finds the largest number in an array of numbers. Find the Prime Numbers:  Write a program that finds all the prime numbers up to a given number. Check if a Number is a Prime Number:  Write a program that checks if a given number is a prime number. Find the Fibonacci Sequence:  Write a program that generates the Fibonacci sequence up to a given number. Calculate the Factorial of a Number:  Write a program that calculates the factorial of a given number. Find the Greatest Common Divisor of Two Numbers:  Write a program th...

The "use strict" directive is a feature in JavaScript that was introduced in ECMAScript 5 (ES5). It allows you to enable strict mode in your JavaScript code.  When strict mode is enabled, the JavaScript engine applies stricter parsing and error handling rules, helping you write cleaner and more reliable code. Here are some key aspects of strict mode in JavaScript: Safer Code:  Strict mode helps catch common coding mistakes and "unsafe" actions in your code. It turns previously silent errors into explicit errors that throw exceptions. This can help you identify and fix issues earlier in the development process. Preventing Global Variables:  In non-strict mode, omitting the var, let, or const keyword when declaring a variable can result in the creation of a global variable. Strict mode prevents this and raises an error. Assignment to Immutable Globals:   Some global variables, like undefined, are considered read-only in strict mode. Assigning a value to these variable...