Functions on Arrays

Lecture 143:- Functions on Arrays

Functions can be used on arrays in JavaScript to perform various operations on them. Some common functions that can be used on arrays are:

1. forEach() function: This function takes a callback function as its argument and executes the callback function on each element of the array.
2. map() function: This function creates a new array by executing the callback function on each element of the original array.
3. filter() function: This function creates a new array by selecting the elements of the original array that meet the condition specified in the callback function.
4. reduce() function: This function reduces the array to a single value by executing the callback function on each element of the array and accumulating the result.
5. sort() function: This function sorts the array in ascending or descending order.
6. indexOf() function: This function returns the index of the first occurrence of the specified element in the array.
7. slice() function: This function creates a new array that contains a subset of the elements of the original array.
8. concat() function: This function creates a new array by combining the elements of two or more arrays.
9. join() function: This function creates a string by joining all the elements of the array with a specified separator.
10. push() and pop() functions: These functions add or remove an element from the end of the array.
11. shift() and unshift() functions: These functions add or remove an element from the beginning of the array.

These are just a few examples of the many functions that can be used on arrays in JavaScript. The choice of function depends on the specific task that needs to be performed on the array.