comefrom: <awangdev>283. Move Zeroes_1.java
code: public void moveZeroes(int[] nums) {
          if (nums == null) return;
          int index = 0, n = nums.length;
          for (int i = 0; i < n; i++) {
              if (nums[i] != 0) nums[index++] = nums[i];
          }
          for (int i = index; i < n; i++) {
              nums[i] = 0;
          }
      }
masked: public void var_0 ( int [ ] var_1 ) {
    if ( var_1 == null ) return ;
    int var_4 = 0 , var_6 = var_1 . length ;
    for ( int var_7 = 0 ;
    var_7 < var_6 ;
    var_7 ++ ) {
      if ( var_1 [ var_7 ] != 0 ) var_1 [ var_4 ++ ] = var_1 [ var_7 ] ;
    }
    for ( int var_7 = var_4 ;
    var_7 < var_6 ;
    var_7 ++ ) {
      var_1 [ var_7 ] = 0 ;
    }
  }
  