package main
import (
"fmt" "strings" //"unicode/utf8"
)
func main() {
fmt.Println("查找子串是否在指定的字符串中") fmt.Println(" Contains 函数的用法") fmt.Println(strings.Contains("seafood","foo")) //true fmt.Println(strings.Contains("seafood","bar")) //false fmt.Println(strings.Contains("seafood","")) //true fmt.Println(strings.Contains("","")) //true 这里要特别注意 fmt.Println(strings.Contains("我是中国人","我")) //true fmt.Println("") fmt.Println(" ContainsAny 函数的用法") fmt.Println(strings.ContainsAny("team","i")) // false fmt.Println(strings.ContainsAny("failure","u & i")) // true fmt.Println(strings.ContainsAny("foo","")) // false fmt.Println(strings.ContainsAny("","")) // false fmt.Println("") fmt.Println(" ContainsRune 函数的用法") fmt.Println(strings.ContainsRune("我是中国",'我')) // true 注意第二个参数,用的是字符 fmt.Println("") fmt.Println(" Count 函数的用法") fmt.Println(strings.Count("cheese","e")) // 3 fmt.Println(strings.Count("five","")) // before & after each rune result: 5,源码中有实现 fmt.Println("") fmt.Println(" EqualFold 函数的用法") fmt.Println(strings.EqualFold("Go","go")) //大小写忽略 fmt.Println("") fmt.Println(" Fields 函数的用法") fmt.Println("Fields are: %q",strings.Fields(" foo bar baz ")) //["foo" "bar" "baz"] 返回一个列表 //相当于用函数做为参数,支持匿名函数 for _,record := range []string{" aaa*1892*122","aaa\taa\t","124|939|22"} { fmt.Println(strings.FieldsFunc(record,func(ch rune) bool { switch { case ch > '5': return true } return false })) } fmt.Println("") fmt.Println(" HasPrefix 函数的用法") fmt.Println(strings.HasPrefix("NLT_abc","NLT")) //前缀是以NLT开头的 fmt.Println("") fmt.Println(" HasSuffix 函数的用法") fmt.Println(strings.HasSuffix("NLT_abc","abc")) //后缀是以NLT开头的 fmt.Println("") fmt.Println(" Index 函数的用法") fmt.Println(strings.Index("NLT_abc","abc")) // 返回第一个匹配字符的位置,这里是4 fmt.Println(strings.Index("NLT_abc","aaa")) // 在存在返回 -1 fmt.Println(strings.Index("我是中国人","中")) // 在存在返回 6 fmt.Println("") fmt.Println(" IndexAny 函数的用法") fmt.Println(strings.IndexAny("我是中国人","中")) // 在存在返回 6 fmt.Println(strings.IndexAny("我是中国人","和")) // 在存在返回 -1 fmt.Println("") fmt.Println(" Index 函数的用法") fmt.Println(strings.IndexRune("NLT_abc",'b')) // 返回第一个匹配字符的位置,这里是4 fmt.Println(strings.IndexRune("NLT_abc",'s')) // 在存在返回 -1 fmt.Println(strings.IndexRune("我是中国人",'中')) // 在存在返回 6 fmt.Println("") fmt.Println(" Join 函数的用法") s := []string{"foo","bar","baz"} fmt.Println(strings.Join(s,",")) // 返回字符串:foo,bar,baz fmt.Println("") fmt.Println(" LastIndex 函数的用法") fmt.Println(strings.LastIndex("go gopher","go")) // 3 fmt.Println("") fmt.Println(" LastIndexAny 函数的用法") fmt.Println(strings.LastIndexAny("go gopher","go")) // 4 fmt.Println(strings.LastIndexAny("我是中国人","中")) // 6 fmt.Println("") fmt.Println(" Map 函数的用法") rot13 := func(r rune) rune { switch { case r >= 'A' && r <= 'Z': return 'A' + (r-'A'+13)%26 case r >= 'a' && r <= 'z': return 'a' + (r-'a'+13)%26 } return r } fmt.Println(strings.Map(rot13,"'Twas brillig and the slithy gopher...")) fmt.Println("") fmt.Println(" Repeat 函数的用法") fmt.Println("ba" + strings.Repeat("na",2)) //banana fmt.Println("") fmt.Println(" Replace 函数的用法") fmt.Println(strings.Replace("oink oink oink","k","ky",2)) fmt.Println(strings.Replace("oink oink oink","oink","moo",-1)) fmt.Println("") fmt.Println(" Split 函数的用法") fmt.Printf("%q\n",strings.Split("a,b,c",")) fmt.Printf("%q\n",strings.Split("a man a plan a canal panama","a ")) fmt.Printf("%q\n",strings.Split(" xyz ","")) fmt.Printf("%q\n",strings.Split("","Bernardo O'Higgins")) fmt.Println("") fmt.Println(" SplitAfter 函数的用法") fmt.Printf("%q\n",strings.SplitAfter("/home/m_ta/src","/")) //["/" "home/" "m_ta/" "src"] fmt.Println("") fmt.Println(" SplitAfterN 函数的用法") fmt.Printf("%q\n",strings.SplitAfterN("/home/m_ta/src","/",2)) //["/" "home/m_ta/src"] fmt.Printf("%q\n",strings.SplitAfterN("#home#m_ta#src","#",-1)) //["/" "home/" "m_ta/" "src"] fmt.Println("") fmt.Println(" SplitN 函数的用法") fmt.Printf("%q\n",strings.SplitN("/home/m_ta/src",1)) fmt.Printf("%q\n",2)) //["/" "home/" "m_ta/" "src"] fmt.Printf("%q\n",-1)) //["" "home" "m_ta" "src"] fmt.Printf("%q\n",strings.SplitN("home,m_ta,src",2)) //["/" "home/" "m_ta/" "src"] fmt.Printf("%q\n",strings.SplitN("#home#m_ta#src",-1)) //["/" "home/" "m_ta/" "src"] fmt.Println("") fmt.Println(" Title 函数的用法") //这个函数,还真不知道有什么用 fmt.Println(strings.Title("her royal highness")) fmt.Println("") fmt.Println(" ToLower 函数的用法") fmt.Println(strings.ToLower("Gopher")) //gopher fmt.Println("") fmt.Println(" ToLowerSpecial 函数的用法") fmt.Println("") fmt.Println(" ToTitle 函数的用法") fmt.Println(strings.ToTitle("loud noises")) fmt.Println(strings.ToTitle("loud 中国")) fmt.Println("") fmt.Println(" Replace 函数的用法") fmt.Println(strings.Replace("ABAACEDF","A","a",2)) // aBaACEDF //第四个参数小于0,表示所有的都替换, 可以看下golang的文档 fmt.Println(strings.Replace("ABAACEDF",-1)) // aBaaCEDF fmt.Println("") fmt.Println(" ToUpper 函数的用法") fmt.Println(strings.ToUpper("Gopher")) //GOPHER fmt.Println("") fmt.Println(" Trim 函数的用法") fmt.Printf("[%q]",strings.Trim(" !!! Achtung !!! ","! ")) // ["Achtung"] fmt.Println("") fmt.Println(" TrimLeft 函数的用法") fmt.Printf("[%q]",strings.TrimLeft(" !!! Achtung !!! ","! ")) // ["Achtung !!! "] fmt.Println("") fmt.Println(" TrimSpace 函数的用法") fmt.Println(strings.TrimSpace(" \t\n a lone gopher \n\t\r\n")) // a lone gopher
}