3 thoughts on “Index”

1. Joseph GabriellaDecember 12, 2014 at 10:39 pm

   Why doesn’t my code work? What happens to the all the other numbers in the array when I assign the value nums[i] to nums[j]? Do they all shift one place to the left?

   public int[] evenOdd(int[] nums) {
   int j=nums.length-1;
   for (int i=0; i<nums.length; i++){
   if (nums[i]%2!=0) nums[j]=nums[i];
   j–;
   }
   return nums;
   }

   Reply ↓
   1. Gregor Ulm Post authorDecember 13, 2014 at 11:41 am

      No, the numbers don’t shift to the left. Instead, you’re overwriting that particular element in the array. Your code doesn’t work because you’re filling nums[] with odd numbers starting from the back. However, you don’t retain the values you overwrite. Assume your array is [3,3,3,2,2,2]. Your code seems to lead to [3,3,3,3,3,3]. Do you see the problem?

      By the way, next time please comment in the section that contains the Coding Bat problem you’d like to discuss.

      Reply ↓
2. Joseph GabriellaDecember 14, 2014 at 12:18 am

   Thank you for your kind, informative response, Gregor. My apologies for writing my question in the wrong place. I will be more careful in the future!

   Best,

   Joseph

   Reply ↓

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