golang語言漸入佳境[23]-string分割類函式

package main

import (
"fmt"
"strings"
"unicode"
)

/*
1、func Fields(s string) []string
將字串s以空白字元分割，返回一個切片

2、func FieldsFunc(s string, f func(rune) bool) []string
將字串s以滿足f(r)==true的字元分割，返回一個切片

3、func Split(s, sep string) []string
將字串s以sep作為分隔符進行分割，分割後字元最後去掉sep

4、func SplitAfter(s, sep string) []string
將字串s以sep作為分隔符進行分割，分割後字元最後附上sep

5、func SplitAfterN(s, sep string, n int) []string
將字串s以sep作為分隔符進行分割，分割後字元最後附上sep，n決定返回的切片數

6、func SplitN(s, sep string, n int) []string
將字串s以sep作為分隔符進行分割，分割後字元最後去掉sep，n決定返回的切片數
 */

func main() {
TestSplitAfterN()
}

func TestFields() {
fmt.Println(strings.Fields("abc 123 ABC xyz XYZ")) //[abc 123 ABC xyz XYZ]
}

func TestFieldsFunc() {
f := func(c rune) bool {
//return c == '='
return !unicode.IsLetter(c) && !unicode.IsNumber(c)
}
fmt.Println(strings.FieldsFunc("abc@123*ABC&xyz%XYZ" , f)) //[abc 123 ABC xyz XYZ]
}

func TestSplit() {
fmt.Printf("%q\n", strings.Split("a,b,c", ","))//[a b c]
fmt.Printf("%q\n", strings.Split("a man a plan a canal panama", "a "))//["" "man " "plan " "canal panama"]
fmt.Printf("%q\n", strings.Split(" xyz ", ""))//[" " "x" "y" "z" " "]
fmt.Printf("%q\n", strings.Split("", "Bernardo O'Higgins"))//[""]
}

func TestSplitN() {
fmt.Printf("%q\n", strings.SplitN("a,b,c", ",", 2))//["a""b,c"]
fmt.Printf("%q\n", strings.SplitN("a,b,c", ",", 1))//["a,b,c"]
}

func TestSplitAfter() {
fmt.Printf("%q\n", strings.SplitAfter("a,b,c", ","))//["a," "b," "c"]
}

func TestSplitAfterN() {
fmt.Printf("%q\n", strings.SplitAfterN("a,b,c", ",", 2))//["a,""b,c"]
}