valid-anagram.go

func isAnagram(s string, t string) bool {
    char := make([]int, 26)

    for _, v := range s {
        i := int(v - 'a')
        char[i]++
    }

    for _, v := range t {
        i := int(v - 'a')
        char[i]--
    }

    for _, v := range char {
        if v != 0 {
            return false
        }
    }

    return true
}

Solution 2

func isAnagram(s string, t string) bool {
    n := len(s)
    
    if n != len(t) { return false }

    var char [26]int

    for i := 0; i < n; i++ {
        char[s[i] - 'a']++
        char[t[i] - 'a']--
    }
    
    for _, v := range char {
        if v != 0 {
            return false
        }
    }

    return true
}