Golang 比较Map

在Go语言中, Map 是一种强大的、巧妙的、多功能的数据结构。GolangMap是一个无序的键值对的集合。它被广泛使用,因为它提供了快速的查找和值,可以在键的帮助下检索、更新或删除。

在Go语言中,你可以使用反射包提供的 DeepEqual() 函数将两个Map相互比较。如果两个Map都满足以下条件,这个函数就会返回真。

  • 两张Map都是空的或非空的。
  • 两个Map都有相同的长度。
  • 两个Map都是同一个Map对象,或者它们对应的键映射到深度相等的值。

否则,此函数返回false。

语法

reflect.DeepEqual(a, b)

这里,a和b是Map,这个函数检查a和b是否深度相等,然后返回布尔型结果。

例子

// Go program to illustrate
// how to compare two maps
package main
 
import (
    "fmt"
    "reflect"
)
 
func main() {
 
    map_1 := map[int]string{
 
        200: "Anita",
        201: "Neha",
        203: "Suman",
        204: "Robin",
        205: "Rohit",
    }
    map_2 := map[int]string{
 
        200: "Anita",
        201: "Neha",
        203: "Suman",
        204: "Robin",
        205: "Rohit",
        206: "Sumit",
    }
 
    map_3 := map[int]string{
 
        200: "Anita",
        201: "Neha",
        203: "Suman",
        204: "Robin",
        205: "Rohit",
    }
    map_4 := map[string]int{
 
        "Anita": 200,
        "Neha":  201,
        "Suman": 203,
        "Robin": 204,
        "Rohit": 205,
    }
 
    // Comparing maps
    // Using DeepEqual() function
    res1 := reflect.DeepEqual(map_1, map_2)
    res2 := reflect.DeepEqual(map_1, map_3)
    res3 := reflect.DeepEqual(map_1, map_4)
    res4 := reflect.DeepEqual(map_2, map_3)
    res5 := reflect.DeepEqual(map_3, map_4)
    res6 := reflect.DeepEqual(map_4, map_4)
    res7 := reflect.DeepEqual(map_2, map_4)
 
    // Displaying result
    fmt.Println("Is Map 1 is equal to Map 2: ", res1)
    fmt.Println("Is Map 1 is equal to Map 3: ", res2)
    fmt.Println("Is Map 1 is equal to Map 4: ", res3)
    fmt.Println("Is Map 2 is equal to Map 3: ", res4)
    fmt.Println("Is Map 3 is equal to Map 4: ", res5)
    fmt.Println("Is Map 4 is equal to Map 4: ", res6)
    fmt.Println("Is Map 2 is equal to Map 4: ", res7)
 
}

输出

Is Map 1 is equal to Map 2:  false
Is Map 1 is equal to Map 3:  true
Is Map 1 is equal to Map 4:  false
Is Map 2 is equal to Map 3:  false
Is Map 3 is equal to Map 4:  false
Is Map 4 is equal to Map 4:  true
Is Map 2 is equal to Map 4:  false