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在Golang中比较字符串的不同方法

本文概述

在Go语言中, 字符串是不可变的任意字节链, 用UTF-8编码。你可以使用两种不同的方式来比较字符串:

1.使用比较运算符:Go字符串支持比较运算符, 即==, !=, > =, <=, <, >。在这里==和!=运算符用于检查给定的字符串是否相等, 而> =, <=, <, >运算符用于查找词法顺序。这些运算符的结果为布尔类型, 这意味着如果满足条件, 它将返回true, 否则返回false.

示例1:

Go

//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 := "srcmini"
     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)
 
}

输出如下:

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

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

示例2:

Go

//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)
 
}

输出如下:

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:你还可以使用字符串包提供的内置函数Compare()比较两个字符串。在字典上比较两个字符串之后, 此函数返回一个整数值。返回值为:

  • 如果返回0str1 == str2.
  • 返回1, 如果str1> str2.
  • 如果为-1, 则返回-1str1 <str2.

语法如下:

func Compare(str1, str2 string) int

例子:

Go

//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( "srcmini" , "srcmini" ))
     
     fmt.Println(strings.Compare( "Geeks" , " GFG" ))
     
     fmt.Println(strings.Compare( "GeeKS" , "GeeKs" ))
 
}

输出如下:

1
0
1
-1

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