HTMLify

func divideArray(nums []int) bool {
    pairs := make(map[int]int)
    for _, n := range nums {
        c, f := pairs[n]
        if !f {
            pairs[n] = 1
        } else {
            pairs[n] = c + 1
        }
    }
    for _, v := range pairs {
        if v%2==1 {
            return false
        }
    }
    return true
}