Find the number in an array that is closest to a given number

Question

I have an Array of integers in javascript, [5,10,15,20,25,30,35] when given a number x, how can I find the element in the array that is closest to that number?

Answer 1

Create a temporary array of the same size as your original array, and populate it with the differences between your x and the array element.

For example, let the temporary array be temp[], and your original array be a[]:

temp[i]=Math.abs(x-a[i]);

Then, return the index of the minimum value in temp[] to the user.