Multiple Pointers Count Unique Values Challenge:Implement a function called countUniqueValues, which accepts a sorted array, and counts the unique values in the array. There can be negative numbers in the array, but it will always be sorted.

multiplePointers-countUniqueValues.js

function countUniqueValues(array){
    if(array.length==0)return 0;
      let i=0;
          for (let j = 1; j < array.length; j++) {
            if(array[i]!=array[j]){
              i++;
              array[i]=array[j];
            }
          }       
    return i+1;
  
  }

console.log(
  countUniqueValues([1,1,1,1,1,2]), // 2
  countUniqueValues([1,2,3,4,4,4,7,7,12,12,13]), // 7
  countUniqueValues([]), // 0
  countUniqueValues([-2,-1,-1,0,1]) ,// 4
  )