Js Array Methods

1. Array.length()

To find length of an Array using array.length method

2. Array.concat()

• To join two or more than two array.
• Returns new array.
• New array will not change existing array.

3. Array.every()

• To check given condition in every array element and returns boolean
• Every array element will pass the test return 'true'
• Any one element will fail the test return 'false'

4. Array.fill()

• Array.fill() method fills some specify element in an array.
• It affects original array.
• Start and end position will not specified, entire array elements fills with given value

5. Array.find()

• Array.find() method return the condition will be true the first element in given array.
• If condition will not pass in given array it return 'Undefined'

6. Array.findIndex()

• FindIndex method return the index position where the condition first satisfy.
• If condition will not satisfy return -1.

7. Array includes()

• Includes method return boolean value.
• If given specified value in array it will return true else return false.
• Include method is case sensitive.

8. Array.push()

• Array push method insert a new element at last position in given array.
• Push method will affect original array.

9. Array.pop()

• Array pop method remove last element in given array.
• It will also affect original array.

10. Array.shift()

• Shift method will remove the first element of the array.
• It will changes the original array.

11. Array.unshift()

• Unshift method will add the new element at first position of the array.
• It will overwrites the original array.

12. Array.slice()

• Slice method return a new copy of array when selected element.
• It like The slice() method returns a shallow copy of a portion of an array into a new array object selected from start to end.

13. Array.sort()

• Sort method return sorted array.