标准库 string
1.func Fields(s string) []string,这个函数的作用是按照1:n个空格来分割字符串最后返回的是[]string的切片
package main import ( "fmt" "strings" ) func main() { for i, s := range strings.Fields("hello widuu golang") { fmt.Println(i, s) } }
执行结果:
0 hello 1 widuu 2 golang
2.func FieldsFunc(s string, f func(rune) bool) []string一看就了解了,这就是根据自定义函数分割——根据指定字符分割
import ( "fmt" "strings" ) func main() { fmt.Println(strings.FieldsFunc("widuunhellonword", split)) // [widuu hello word]根据n字符分割 } func split(s rune) bool { if s == 'n' { return true } return false }
3.func Join(a []string, sep string) string,这个跟php中的implode差不多,这个函数是将一个[]string的切片通过分隔符,分割成一个字符串
import ( "fmt" "strings" ) func main() { s := []string{"hello", "word", "xiaowei"} fmt.Println(strings.Join(s, "-")) // hello-word-xiaowei }
4.func Split(s, sep string) []string,有join就有Split这个就是把字符串按照指定的分隔符切割成slice
import ( "fmt" "strings" ) func main() { fmt.Println(strings.Split("a,b,c,d,e", ",")) //[a b c d e] }
5.func SplitAfter(s, sep string) []string,这个函数是在前边的切割完成之后再后边在加上sep分割符
package main import ( "fmt" "strings" ) func main() { for i, s := range strings.SplitAfter("a,b,c,d", ",") { fmt.Println(i, s) } }
执行结果:
0 a, 1 b, 2 c, 3 d
6.func SplitAfterN(s, sep string, n int) []string该函数s根据sep分割,返回分割之后子字符串的slice,和split一样,只是返回的子字符串保留sep,如果sep为空,那么每一个字符都分割
import ( "fmt" "strings" ) func main() { fmt.Println(strings.SplitAfterN("a,b,c,d,r", ",", 4)) //["a," "b," "c," "d,r"] fmt.Println(strings.SplitAfterN("a,b,c,d,r", ",", 5)) //["a," "b," "c," "d," "r"] }
7.func SplitN(s, sep string, n int) []string,这个是切割字符串的时候自己定义长度,如果sep为空,那么每一个字符都分割
import ( "fmt" "strings" ) func main() { fmt.Println(strings.SplitN("a,b,c", ",", 2)) //[a b,c] }