go SplitN()

SplitN()方法语法

func SplitN(s, sep string, n int) []string

go源码对SplitN()方法的介绍：

SplitN slices s into substrings separated by sep and returns a slice of the substrings between those separators.

The count determines the number of substrings to return:

n > 0: at most n substrings; the last substring will be the unsplit remainder.
n == 0: the result is nil (zero substrings)

即，golang的strings.SplitN()方法，可以将参数指定的字符串s以sep为分隔符切分字符串，当整数类型的n大于0，可以指定字符串按分隔符切分成几部分，如果n==0，等返回nil，如果n小于0，则返回字符串按分隔符全部切分组成的切片。

strings.SplitN()方法实例代码

func main() {
	var str string = "笨鸟工具，x1y1z1.com"
	var str_slice1 []string = strings.SplitN(str, "1", 2)
	fmt.Println(str_slice1)
	var str_slice2 []string = strings.SplitN(str, "1", -1)
	fmt.Println(str_slice2)
	str_slice3 := strings.SplitN(str, "1", 0)
	fmt.Println(str_slice3)
}

运行go文件，得到输出：

[笨鸟工具，x y1z1.com]
[笨鸟工具，x y z .com]
[]

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