JavaScript Array Methods
JavaScript Array Methods
In JavaScript Array Methods provides many built-in array methods to add, remove, search, sort, and manipulate data efficiently.
1. push() – Add Item to End
Output:["Apple", "Banana", "Mango"]
2. pop() – Remove Last Item
Output:["Apple", "Banana"]
3. shift() – Remove First Item
Output:["Banana"]
4. unshift() – Add Item to Beginning
Output:["Orange", "Banana"]
5. splice() – Add or Remove Items
Output:[10, 20, 40]
Add using splice:
6. slice() – Copy Part of Array
7. concat() – Join Arrays
8. indexOf() – Find Position
9. includes() – Check If Exists
10. sort() – Sort Alphabetically or Numerically
Sort numbers properly:
11. reverse() – Reverse Array
12. join() – Convert Array to String
13. map() – Create New Array by Applying Function
14. filter() – Returns Only Matching Elements
15. reduce() – Calculate a Single Result
Example: sum of numbers
16. forEach() – Loop Through Array
✔ Summary Table
| Method | Action |
|---|---|
push() |
Add to end |
pop() |
Remove last |
shift() |
Remove first |
unshift() |
Add first |
splice() |
Add/remove items |
slice() |
Copy portion |
concat() |
Combine arrays |
indexOf() / includes() |
Search items |
sort() / reverse() |
Modify order |
join() |
Convert to string |
map() |
Transform array |
filter() |
Filter values |
reduce() |
Compute single result |
forEach() |
Loop through items |
