Leetcode Note: Go - Check if All Characters Have Equal Number of Occurrences

func areOccurrencesEqual(s string) bool {
    count, prev := make(map[rune]int), 0
    
    for _, l := range s {
        count[l]++
    }
    
    for _, v := range count {
        switch {
        case prev <= 0:
            prev = v
        case prev != v:
            return false
        }
    }

    return true
}