Difference array

1. What is a difference array?
2. What is array in simple language?
3. How do you check if an array value is the same?

What is a difference array?

Difference array can be used to perform range update queries “l r x” where l is left index, r is right index and x is value to be added and after all queries you can return original array from it.

What is array in simple language?

An array is a collection of similar data elements stored at contiguous memory locations. It is the simplest data structure where each data element can be accessed directly by only using its index number.

How do you check if an array value is the same?

In order to check whether every value of your records/array is equal to each other or not, you can use this function. allEqual() function returns true if the all records of a collection are equal and false otherwise. let's look at the syntax… const allEqual = arr => arr.