dongwei2610 2016-10-05 07:37
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如何在Golang中生成数字序列?

I want to generate a sequence of numbers in Golang but I can't find any built-in functions for this.
Basically I want the equivalent of PHP's range function in Golang:

array range ( mixed $start , mixed $end [, number $step = 1 ] )

It would be useful when creating a slice/array of numeric types and you want to populate/initialize it with a numeric sequence.

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  • dongshuan8722 2016-10-05 07:50
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    There is no equivalent to PHP's range in the Go standard library. You have to create one yourself. The simplest is to use a for loop:

    func makeRange(min, max int) []int {
        a := make([]int, max-min+1)
        for i := range a {
            a[i] = min + i
        }
        return a
    }
    

    Using it:

    a := makeRange(10, 20)
    fmt.Println(a)
    

    Output (try it on the Go Playground):

    [10 11 12 13 14 15 16 17 18 19 20]
    

    Also note that if the range is small, you can use a composite literal:

    a := []int{1, 2, 3}
    fmt.Println(a) // Output is [1 2 3]
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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