dpf56454 2017-07-06 05:56
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在golang中找到最小值?

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.

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  • duanmaifu3428 2017-07-06 06:07
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    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
    }
    
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