good point
from w3schools: array.sort(sortfunction)

without sortfunction it's inconsistent

for example, 
[1,2,8,3,5,9,3,-2].sort()
[ -2,  1,  2,  3,  3,  5,  8,  9 ] - asc order

[-4,-67,-1,-2,-6].sort()
[ -1,  -2,  -4,  -6,  -67 ] - desc order

for us it doesn't matter
I just wanted it to be consistent

If you still prefer sort() let me know, I will change it