Array Methods In Js

Array Methods
Array methods are built-in functions that allow you to perform operations on arrays in a concise and efficient way. They provide a powerful set of tools for manipulating and working with arrays without the need for manual loops.

Here are some of the most commonly used array methods in JavaScript:

1. map():

Use: Creates a new array by applying a given function to each element of the original array.

Example:

 const numbers = [1, 2, 3, 4, 5];
  const doubled = numbers.map(number => number * 2); 
  console.log(doubled); // Output: [2, 4, 6, 8, 10]

2. filter():

Use: Creates a new array containing only the elements that satisfy a given condition.

Example:

  const ages = [18, 25, 16, 30, 20];
    const adults = ages.filter(age => age >= 18);
    console.log(adults); // Output: [18, 25, 30, 20]

3. forEach():

Use: Executes a provided function once for each element in the array.

Example:

  const names = ["Alice", "Bob", "Charlie"];
  names.forEach(name => console.log(name));

4. sort():

Use: Sorts the elements of an array in place and returns the sorted array.

Example:

  const fruits = ["banana", "apple", "orange"];
  fruits.sort(); 
  console.log(fruits); // Output: ["apple", "banana", "orange"]

5. join():

Use: Creates and returns a new string by concatenating all of the elements in an array, separated by a specified separator.

Example:

  const fruits = ["Apple", "Banana", "Cherry"];
  const result = fruits.join(" - ");
  console.log(result); // Output: "Apple - Banana - Cherry"

6. slice():

Use: Returns a shallow copy of a portion of an array into a new array selected from start to end (end not included).

Example:

  const numbers = [1, 2, 3, 4, 5];
  const sliced = numbers.slice(1, 3); 
  console.log(sliced); // Output: [2, 3]

7. concat():

Use: Creates a new array by concatenating the specified arrays or values to the end of the current array.

Example:

  const array1 = [1, 2, 3];
    const array2 = [4, 5, 6];
    const combined = array1.concat(array2); 
    console.log(combined); // Output: [1, 2, 3, 4, 5, 6]

8. includes():

Use: Determines whether an array includes a certain value among its entries, returning true or false as appropriate.

Example:

  const numbers = [1, 2, 3, 4, 5];
  const includesThree = numbers.includes(3); 
  console.log(includesThree); // Output: true

9. push():

Use: Adds one or more elements to the end of an array and returns the new length of the array.

Example:

  const numbers = [1, 2, 3];
  numbers.push(4, 5); 
  console.log(numbers); // Output: [1, 2, 3, 4, 5]

10. pop():

Use: Removes the last element from an array and returns that element.

Example:

  const numbers = [1, 2, 3];
  const last = numbers.pop(); 
  console.log(numbers); // Output: [1, 2]
  console.log(last); // Output: 3

1. map():

2. filter():

3. forEach():

4. sort():

5. join():

6. slice():

7. concat():

8. includes():

9. push():

10. pop():

How did you feel about this post?