Can I do this in Nim?

[jzakiya]

I have this code where I'm setting all the bytes in `seg` to `0`.
    
    
    for b in s_row..s_row+KB-1: seg[b] = 0
    

Can I do something like: `seg[a..b] = 0`

Then I have this code that counts all the `0` in `seg`
    
    
    for k in 0..Kn-1: (if seg[s_row+k] == 0: sum += 1)
    

Is there a way to do something like this: `sum = seg[a..b].count(0)`

If so, would they be faster than the current code constructs?