golang字符串處理
package main
import (
"fmt"
"strconv" //strconv包實現了基本數據類型和其字符串表示的相互轉換。
s "strings" //對字符串的操作包
)
//fmt 怎麼輸出字符串參考相關文檔
var p = fmt.Println
var pf = fmt.Printf
//入口函數了
func main() {
/*Go的字符串是由單個字節連接起來的。也就是說對於傳統的字符串是由字符組成的,而Go的字符串不同,它是由字節組成的*/
str := "hello \n word!"
p(str)
str = `hello \n word!"`
p(str)
str2 := "xxb歡迎你"
pf("str 的字節長度爲:%d \n", len(str2))
//內建函數len返回 v 的長度,取決於具體類型
//內建函數還有 new make cap append copy delete close panic recover print println 等
//str2[0] = 'c' 不可以這樣賦值
r := []rune(str2)
//32位有符號整形,int32的別名,二者視爲同一類型。
p("str 的字符長度爲:", len(r))
p(r[2], " | ", r[4], " | ", r[0:], " | ", r[0:4], " | ", r[:4], " | ", r[0:len(r)-1], " | ", r[:], " | ", r)
p(string(r[0:4]))
p(string(r))
p(string(r[:]))
//字符串轉數字
//strconv包實現了基本數據類型和其字符串表示的相互轉換。
iStr := "123131123"
//go 裏面方法是可以返回多個值的 下面這個一看就知道是啥意思了吧!
d, err := strconv.Atoi(iStr) //strconv.ParseInt(iStr, 10, 0).
if err == nil {
p(d * 100)
} else {
p(err)
}
iStr2 := "01111111"
d2, _ := strconv.ParseInt(iStr2, 2, 0)
p(d2)
iStr3 := "-F4"
d3, _ := strconv.ParseInt(iStr3, 16, 0)
p(d3)
d4 := 128
p("字符串:" + strconv.Itoa(d4))
pf("二進制字符串: %b \n", d4)
pf("八進制字符串: %o \n", d4)
pf("十六進制字符串: %x \n", d4)
p("二進制字符串:", strconv.FormatInt(int64(d4), 2))
p("八進制字符串:", strconv.FormatInt(int64(d4), 8))
p("十六進制字符串:", strconv.FormatInt(int64(d4), 16))
p("bool:", strconv.FormatBool(0 > 1))
//strings 包
var strs0 string = "xxb歡迎你"
var strs2 string = "xxb歡迎你"
p(strs0 == strs2)
p(`EqualFold("xxb歡迎你", "XXB歡迎你"):`, s.EqualFold("xxb歡迎你", "XXB歡迎你"))
p(`HasPrefix("xxb歡迎你", "xxb"):`, s.HasPrefix("xxb歡迎你", "xxb"))
p(`HasSuffix("xxb歡迎你", "b歡迎你"):`, s.HasSuffix("xxb歡迎你", "b歡迎你"))
p(`Contains("xxb歡迎你", "xxb"):`, s.Contains("xxb歡迎你", "xxb"))
p(`ContainsAny("xxb歡迎你", "ddx"):`, s.ContainsAny("xxb歡迎你", "ddx"))
p(`Count("xxb歡迎你", "x"):`, s.Count("xxb歡迎你", "x"))
p(`Count("xxxb歡迎你", "xx"):`, s.Count("xxxb歡迎你", "xx"))
p(`Index("xxb歡迎你", "迎"):`, s.Index("xxb歡迎你", "你"))
p(`IndexRune("xxb歡迎你", []rune("你")[0]):`, s.IndexRune("xxb歡迎你", []rune("你")[0]))
p(`Split("xxb,歡迎你", ","):`, s.Split("xxb,歡迎你", ","))
p(`Replace("xxb歡迎你", "xxb", "xxxb,", 1):`, s.Replace("xxb歡迎你", "xxb", "xxxb,", 1))
p(`Join([]string{"xxb", "你好"}, "|"):`, s.Join([]string{"xxb", "你好"}, "|"))
p(`ToLower("xxB歡迎你"):`, s.ToLower("xxB歡迎你"))
p(`ToUpper("xxB歡迎你"):`, s.ToUpper("xxB歡迎你"))
p(`Fields("xxb 歡迎你"):`, s.Fields("xxb 歡迎你"))
p(`FieldsFunc(s string, f func(rune) bool) []string:`, s.FieldsFunc("hello world xxbb 歡迎你", func(r rune) bool {
switch {
case r == 98:
return true
}
return false
}))
p(`Trim(" xxb 歡迎你 "):`, s.Trim(" xxb 歡迎你 ", " "))
//其它參考文檔
}