See holes in the array?

Perform simple code
https://jsfiddle.net/2yro4bxm/
After running the Count to 100, and the array always has 100 elements assigned to the property, but almost always in the array at random places there are holes - element undefined. from 0 to 4 holes. That is, in the end, the length of the array 100-104 element that must be always 100
Why is this happening?
July 8th 19 at 15:57
2 answers
July 8th 19 at 15:59
Mode of psychic:
Most likely in obj_percent there are objects without avatar.
Try in a loop to make a console.log(key)
July 8th 19 at 16:01
The complete code is shown, no errors in the variable names at least

Find more questions by tags JavaScript