Problem solving Techiques code snippets

algo problem solving.txt

Moving to last element in array and moving towards left till we reach an even element

int[] arr = {1, 2, 3, 4, 5};
int i = arr.length -1;

while(i>=0 && arr[i] % 2 == 1)
  i--;
  
------------------------------------------------

removing element from array with given index 

int arr2[] = new int[arr.length -1];

        /**
         *  Copy the elements from starting till index from original array to the other array till index positio
         *  to delete
         *
          */
     System.arraycopy(arr, 0, arr2, 0, index);

        /**
         * Copy elements from arr1 to arr2 after index position (index +1) to other array.
         * now filling the remaining index positions of array such so we need (arr.length - index -1) gives
         * remaining index position to fill in.
         */
     System.arraycopy(arr, index+1, arr2, index, arr.length -index -1);