Golang 比较字符串的不同方法

在Go语言中，字符串是由UTF-8编码的任意字节组成的不可改变的链。你可以用两种不同的方式将字符串相互比较。

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

例1 :

// Go program to illustrate the concept
// of == and != operator with strings
package main
 
import "fmt"
 
// Main function
func main() {
 
    // Creating and initializing strings
    // using shorthand declaration
    str1 := "Geeks"
    str2 := "Geek"
    str3 := "GeeksforGeeks"
    str4 := "Geeks"
 
    // Checking the string are equal
    // or not using == operator
    result1 := str1 == str2
    result2 := str2 == str3
    result3 := str3 == str4
    result4 := str1 == str4
     
    fmt.Println("Result 1: ", result1)
    fmt.Println("Result 2: ", result2)
    fmt.Println("Result 3: ", result3)
    fmt.Println("Result 4: ", result4)
 
    // Checking the string are not equal
    // using != operator
    result5 := str1 != str2
    result6 := str2 != str3
    result7 := str3 != str4
    result8 := str1 != str4
     
    fmt.Println("\nResult 5: ", result5)
    fmt.Println("Result 6: ", result6)
    fmt.Println("Result 7: ", result7)
    fmt.Println("Result 8: ", result8)
 
}

输出

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

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

例2 :

// Go program to illustrate the concept
// of comparison operator with strings
package main
 
import "fmt"
 
// Main function
func main() {
 
    // Creating and initializing
    // slice of string using the
    // shorthand declaration
    myslice := []string{"Geeks", "Geeks",
                    "gfg", "GFG", "for"}
     
    fmt.Println("Slice: ", myslice)
 
    // Using comparison operator
    result1 := "GFG" > "Geeks"
    fmt.Println("Result 1: ", result1)
 
    result2 := "GFG" < "Geeks"
    fmt.Println("Result 2: ", result2)
 
    result3 := "Geeks" >= "for"
    fmt.Println("Result 3: ", result3)
 
    result4 := "Geeks" <= "for"
    fmt.Println("Result 4: ", result4)
 
    result5 := "Geeks" == "Geeks"
    fmt.Println("Result 5: ", result5)
 
    result6 := "Geeks" != "for"
    fmt.Println("Result 6: ", result6)
 
}

输出

Slice:  [Geeks Geeks gfg GFG for]
Result 1:  false
Result 2:  true
Result 3:  false
Result 4:  true
Result 5:  true
Result 6:  true

2.使用Compare()方法： 你也可以使用字符串包提供的内置函数Compare()来比较两个字符串。这个函数在对两个字符串进行词典式比较后，返回一个整数值。其返回值为。

返回0，如果 str1 == str2 。
返回1，如果 str1 >str2。
返回 -1, 如果 str1 < str2 .

语法

func Compare(str1, str2 string) int

例子

// Go program to illustrate how to compare
// string using compare() function
package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
 
    // Comparing string using Compare function
    fmt.Println(strings.Compare("gfg", "Geeks"))
     
    fmt.Println(strings.Compare("GeeksforGeeks",
                               "GeeksforGeeks"))
     
    fmt.Println(strings.Compare("Geeks", " GFG"))
     
    fmt.Println(strings.Compare("GeeKS", "GeeKs"))
 
}

输出