hello-algo/codes/go/chapter_hashing/hash_map_test.go

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// File: hash_map_test.go
// Created Time: 2022-12-14
// Author: msk397 (machangxinq@gmail.com)
package chapter_hashing
import (
"fmt"
"testing"
)
func TestHashmap(t *testing.T) {
/* 初始化哈希表 */
mapp := make(map[int]string)
/* 添加操作 */
// 在哈希表中添加键值对 (key, value)
mapp[12836] = "小哈"
mapp[15937] = "小啰"
mapp[16750] = "小算"
mapp[13276] = "小法"
mapp[10583] = "小鸭"
fmt.Println("\n添加完成后哈希表为\nKey -> Value")
for key, value := range mapp {
fmt.Printf("%d -> %s\n", key, value)
}
/* 查询操作 */
// 向哈希表输入键 key ,得到值 value
name := mapp[15937]
fmt.Println("\n输入学号 15937 ,查询到姓名 ", name)
/* 删除操作 */
// 在哈希表中删除键值对 (key, value)
delete(mapp, 10583)
fmt.Println("\n删除 10583 后,哈希表为\nKey -> Value")
for key, value := range mapp {
fmt.Printf("%d -> %s\n", key, value)
}
/* 遍历哈希表 */
// 遍历键值对 key->value
fmt.Println("\n遍历键值对 Key->Value")
for key, value := range mapp {
fmt.Println(key, "->", value)
}
// 单独遍历键 key
fmt.Println("\n单独遍历键 Key")
for key := range mapp {
fmt.Println(key)
}
// 单独遍历值 value
fmt.Println("\n单独遍历值 Value")
for _, value := range mapp {
fmt.Println(value)
}
}