All

Returns true if all elements in the collection pass the test implemented by the provided function, false otherwise.

• Implement an appropriate function for each type.
• Use range to iterate over elements in the given collection, returning true or false based on the result of fn.
• The functions can be tweaked to allow for an index to be passed to fn as a second argument, if desired.

func AllInt(arr []int, fn func(int) bool) bool {
    for _, v := range arr {
        if !fn(v) {
            return false
        }
    }
    return true
}
func AllFloat64(arr []float64, fn func(float64) bool) bool {
    for _, v := range arr {
        if !fn(v) {
            return false
        }
    }
    return true
}
func AllBool(arr []bool, fn func(bool) bool) bool {
    for _, v := range arr {
        if !fn(v) {
            return false
        }
    }
    return true
}
func AllString(arr []string, fn func(string) bool) bool {
    for _, v := range arr {
        if !fn(v) {
            return false
        }
    }
    return true
}

intCheck := func(x int) bool { return x > 1 }
AllInt([]int{4, 2}, intCheck) // true
float64Check := func(x float64) bool { return x > 0.5 }
AllFloat64([]float64{0.8, 1.0}, float64Check) // true
boolCheck := func(x bool) bool { return x }
AllBool([]bool{true, true}, boolCheck) // true
stringCheck := func(x string) bool { return len(x) > 1 }
AllString([]string{"go", "hi"}, stringCheck) // true