Example summary is a common string handling method in Go language

This example summarizes common string handling methods in the Go language. Share with you for your reference. The details are as follows:

package main

import (

    "fmt"

    "strings"

    //"unicode/utf8"

)

func main() {

    fmt.Println(" Finds whether the substring is in the specified string ")

    fmt.Println(" Contains  Function usage ")

    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  Special attention should be paid here 

    fmt.Println(strings.Contains(" I'm Chinese ", " I "))     //true

    fmt.Println("")

    fmt.Println(" ContainsAny  Function usage ")

    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  Function usage ")

    fmt.Println(strings.ContainsRune(" I am a Chinese ", ' I ')) // true  Note that the first 2 It takes two parameters, and it takes a character 

    fmt.Println("")

    fmt.Println(" Count  Function usage ")

    fmt.Println(strings.Count("cheese", "e")) // 3

    fmt.Println(strings.Count("five", ""))    // before & after each rune result: 5 ,  There is implementation in the source code 

    fmt.Println("")

    fmt.Println(" EqualFold  Function usage ")

    fmt.Println(strings.EqualFold("Go", "go")) // Case ignore 

    fmt.Println("")

    fmt.Println(" Fields  Function usage ")

    fmt.Println("Fields are: %q", strings.Fields("  foo bar  baz   ")) //["foo" "bar" "baz"]  return 1 A list of 

    // It is equivalent to using functions as arguments to support anonymous functions 

    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  Function usage ")

    fmt.Println(strings.HasPrefix("NLT_abc", "NLT")) // The prefix is NLT At the beginning of 

    fmt.Println("")

    fmt.Println(" HasSuffix  Function usage ")

    fmt.Println(strings.HasSuffix("NLT_abc", "abc")) // The suffix is NLT At the beginning of 

    fmt.Println("")

    fmt.Println(" Index  Function usage ")

    fmt.Println(strings.Index("NLT_abc", "abc")) //  Returns the first 1 The position of the matching character 4

    fmt.Println(strings.Index("NLT_abc", "aaa")) //  Return in existence  -1

    fmt.Println(strings.Index(" I'm Chinese ", " In the "))     //  Return in existence  6

    fmt.Println("")

    fmt.Println(" IndexAny  Function usage ")

    fmt.Println(strings.IndexAny(" I'm Chinese ", " In the ")) //  Return in existence  6

    fmt.Println(strings.IndexAny(" I'm Chinese ", " and ")) //  Return in existence  -1

    fmt.Println("")

    fmt.Println(" Index  Function usage ")

    fmt.Println(strings.IndexRune("NLT_abc", 'b')) //  Returns the first 1 The position of the matching character 4

    fmt.Println(strings.IndexRune("NLT_abc", 's')) //  Return in existence  -1

    fmt.Println(strings.IndexRune(" I'm Chinese ", ' In the '))   //  Return in existence  6

    fmt.Println("")

    fmt.Println(" Join  Function usage ")

    s := []string{"foo", "bar", "baz"}

    fmt.Println(strings.Join(s, ", ")) //  Return string: foo, bar, baz

    fmt.Println("")

    fmt.Println(" LastIndex  Function usage ")

    fmt.Println(strings.LastIndex("go gopher", "go")) // 3

    fmt.Println("")

    fmt.Println(" LastIndexAny  Function usage ")

    fmt.Println(strings.LastIndexAny("go gopher", "go")) // 4

    fmt.Println(strings.LastIndexAny(" I'm Chinese ", " In the "))      // 6

    fmt.Println("")

    fmt.Println(" Map  Function usage ")

    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  Function usage ")

    fmt.Println("ba" + strings.Repeat("na", 2)) //banana

    fmt.Println("")

    fmt.Println(" Replace  Function usage ")

    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  Function usage ")

    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  Function usage ")

    fmt.Printf("%q\n", strings.SplitAfter("/home/m_ta/src", "/")) //["/" "home/" "m_ta/" "src"]

    fmt.Println("")

    fmt.Println(" SplitAfterN  Function usage ")

    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  Function usage ")

    fmt.Printf("%q\n", strings.SplitN("/home/m_ta/src", "/", 1))

    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.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  Function usage ") // This function, I don't know what it does, right 

    fmt.Println(strings.Title("her royal highness"))

    fmt.Println("")

    fmt.Println(" ToLower  Function usage ")

    fmt.Println(strings.ToLower("Gopher")) //gopher

    fmt.Println("")

    fmt.Println(" ToLowerSpecial  Function usage ")

    fmt.Println("")

    fmt.Println(" ToTitle  Function usage ")

    fmt.Println(strings.ToTitle("loud noises"))

    fmt.Println(strings.ToTitle("loud  China "))

    fmt.Println("")

    fmt.Println(" Replace  Function usage ")

    fmt.Println(strings.Replace("ABAACEDF", "A", "a", 2)) // aBaACEDF

    // The first 4 Is less than 0 So I'm going to replace everything,   May have a look golang The document 

    fmt.Println(strings.Replace("ABAACEDF", "A", "a", -1)) // aBaaCEDF

    fmt.Println("")

    fmt.Println(" ToUpper  Function usage ")

    fmt.Println(strings.ToUpper("Gopher")) //GOPHER

    fmt.Println("")

    fmt.Println(" Trim   Function usage ")

    fmt.Printf("[%q]", strings.Trim(" !!! Achtung !!! ", "! ")) // ["Achtung"]

    fmt.Println("")

    fmt.Println(" TrimLeft  Function usage ")

    fmt.Printf("[%q]", strings.TrimLeft(" !!! Achtung !!! ", "! ")) // ["Achtung !!! "]

    fmt.Println("")

    fmt.Println(" TrimSpace  Function usage ")

    fmt.Println(strings.TrimSpace(" \t\n a lone gopher \n\t\r\n")) // a lone gopher

}

I hope this article has been helpful to your programming of Go language.