30秒学会 Golang 片段 – Any

Returns true if at least one element in the collection passes 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.

代码实现

func AnyInt(arr []int, fn func(int) bool) bool {
    for _, v := range arr {
        if fn(v) {
            return true
        }
    }
    return false
}
func AnyFloat64(arr []float64, fn func(float64) bool) bool {
    for _, v := range arr {
        if fn(v) {
            return true
        }
    }
    return false
}
func AnyBool(arr []bool, fn func(bool) bool) bool {
    for _, v := range arr {
        if fn(v) {
            return true
        }
    }
    return false
}
func AnyString(arr []string, fn func(string) bool) bool {
    for _, v := range arr {
        if fn(v) {
            return true
        }
    }
    return false
}

使用样例

intCheck := func(x int) bool { return x > 1 }
AnyInt([]int{0, 2}, intCheck) // true
float64Check := func(x float64) bool { return x > 0.5 }
AnyFloat64([]float64{0.0, 1.0}, float64Check) // true
boolCheck := func(x bool) bool { return x }
AnyBool([]bool{false, true}, boolCheck) // true
stringCheck := func(x string) bool { return len(x) > 1 }
AnyString([]string{"", "hi"}, stringCheck) // true