GoLang 比较字符串

本篇文章演示如何在 Go 语言中比较字符串。

Compare()

在 Go 语言中使用 Compare() 方法比较字符串

Compare()

func Compare(a, b string) int

其中 a 和 b 是要比较的两个字符串，它返回一个整数值。 根据字符串的比较，有三种返回类型。

a == bcompare()a > bcompare()a < bcompare()

Compare()

package main

import (
    "fmt"
    "strings"
)

func main() {

    var string1 = "x"
    var string2 = "y"
    var string3 = "Delftstack"
    var string4 = "Delftscope"

    // string1 < string2 should return -1
    fmt.Println(strings.Compare(string1, string2))

    // string2 > string1 should return 1
    fmt.Println(strings.Compare(string2, string1))

    // string1 == string1 should return 0
    fmt.Println(strings.Compare(string1, string1))

    // string3 > string4 should return 1
    fmt.Println(strings.Compare(string3, string4))

    // string4 < string3 should return -1
    fmt.Println(strings.Compare(string4, string3))


    // Let's create a condition
    string5 := "Hello this is delftstack.com!"
    string6 := "Hello this is DELFTSTACK.COM!"

    // using the Compare function
    if strings.Compare(string5, string6) == 0 {
        fmt.Println("The strings are a match.")
    } else {
        fmt.Println("The strings do not match.")
    }
}

Compare()

查看输出：

-1
1
0
1
-1
The strings do not match.

在 Go 语言中使用比较运算符比较字符串

==!=>=<=<>==!=

==!=

package main

import "fmt"

func main() {

    string1 := "Delftsatck"
    string2 := "Delft"
    string3 := "Delftsatck.com"
    string4 := "Delftsatck"

    // using == operator
    ComparisonResult1 := string1 == string2
    ComparisonResult2 := string2 == string3
    ComparisonResult3 := string3 == string4
    ComparisonResult4 := string1 == string4

    fmt.Println("Result 1 is: ", ComparisonResult1)
    fmt.Println("Result 2 is: ", ComparisonResult2)
    fmt.Println("Result 3 is: ", ComparisonResult3)
    fmt.Println("Result 4 is: ", ComparisonResult4)

    // using != operator
    ComparisonResult5 := string1 != string2
    ComparisonResult6 := string2 != string3
    ComparisonResult7 := string3 != string4
    ComparisonResult8 := string1 != string4

    fmt.Println("\nResult 5 is: ", ComparisonResult5)
    fmt.Println("Result 6 is: ", ComparisonResult6)
    fmt.Println("Result 7 is: ", ComparisonResult7)
    fmt.Println("Result 8 is: ", ComparisonResult8)

}

上面的代码将根据相等性和不等性比较给定的字符串。 查看输出：

Result 1 is:  false
Result 2 is:  false
Result 3 is:  false
Result 4 is:  true

Result 5 is:  true
Result 6 is:  true
Result 7 is:  true
Result 8 is:  false

>=<=<>

package main

import "fmt"

func main() {

    string1 := "Delftsatck"
    string2 := "Delft"
    string3 := "Delftsatck.com"
    string4 := "Delftsatck"

    // using < operator
    ComparisonResult1 := string1 < string2
    ComparisonResult2 := string2 < string3
    ComparisonResult3 := string3 < string4
    ComparisonResult4 := string1 < string4

    fmt.Println("Result 1 is: ", ComparisonResult1)
    fmt.Println("Result 2 is: ", ComparisonResult2)
    fmt.Println("Result 3 is: ", ComparisonResult3)
    fmt.Println("Result 4 is: ", ComparisonResult4)

    // using > operator
    ComparisonResult5 := string1 > string2
    ComparisonResult6 := string2 > string3
    ComparisonResult7 := string3 > string4
    ComparisonResult8 := string1 > string4

    fmt.Println("\nResult 5 is: ", ComparisonResult5)
    fmt.Println("Result 6 is: ", ComparisonResult6)
    fmt.Println("Result 7 is: ", ComparisonResult7)
    fmt.Println("Result 8 is: ", ComparisonResult8)

    // using >= operator
    ComparisonResult9 := string1 >= string2
    ComparisonResult10 := string2 >= string3
    ComparisonResult11 := string3 >= string4
    ComparisonResult12 := string1 >= string4

    fmt.Println("\nResult 9 is: ", ComparisonResult9)
    fmt.Println("Result 10 is: ", ComparisonResult10)
    fmt.Println("Result 11 is: ", ComparisonResult11)
    fmt.Println("Result 12 is: ", ComparisonResult12)

    // using <= operator
    ComparisonResult13 := string1 <= string2
    ComparisonResult14 := string2 <= string3
    ComparisonResult15 := string3 <= string4
    ComparisonResult16 := string1 <= string4

    fmt.Println("\nResult 13 is: ", ComparisonResult13)
    fmt.Println("Result 14 is: ", ComparisonResult14)
    fmt.Println("Result 15 is: ", ComparisonResult15)
    fmt.Println("Result 16 is: ", ComparisonResult16)

}

现在将根据字典顺序比较上述字符串。 查看输出：

Result 1 is:  false
Result 2 is:  true
Result 3 is:  false
Result 4 is:  false

Result 5 is:  true
Result 6 is:  false
Result 7 is:  true
Result 8 is:  false

Result 9 is:  true
Result 10 is:  false
Result 11 is:  true
Result 12 is:  true

Result 13 is:  false
Result 14 is:  true
Result 15 is:  false
Result 16 is:  true