The first block (++[[]]) is incrementing in a object but the object is superimposed with other object and the result is error. the second block [+[]] when [] i

The first block (++[[]]) is incrementing in a object but the object is superimposed with other object and the result is error. the second block [+[]] when [] is object but incrementing + is a number 0 and side-by-side with the block the result is exactly 1.