在golang中找到最小值？

Question

In the language there is a minimum function https://golang.org/pkg/math/#Min But what if I have more than 2 numbers? I must to write a manual comparison in a for loop, or is there another way? The numbers are in the slice.

Answer 1

No, there isn't any better way than looping. Not only is it cleaner than any other approach, it's also the fastest.

values := []int{4, 20, 0, -11, -10}

min := values[0]
for _, v := range values {
        if (v < min) {
            min = v
        }
}

fmt.Println(min)

EDIT

Since there has been some discussion in the comments about error handling and how to handle empty slices, here is a basic function that determines the minimum value. Remember to import errors.

func Min(values []int) (min int, e error) {
    if len(values) == 0 {
        return 0, errors.New("Cannot detect a minimum value in an empty slice")
    }

    min = values[0]
    for _, v := range values {
            if (v < min) {
                min = v
            }
    }

    return min, nil
}