64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package utils
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import (
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"fmt"
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"sync"
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)
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// 定义一个泛型的 SyncMap，支持任意类型的键和值
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type SyncMap[K comparable, V any] struct {
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m sync.Map
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}
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// 设置键值对
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func (sm *SyncMap[K, V]) Store(key K, value V) {
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sm.m.Store(key, value)
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}
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// 获取键对应的值
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func (sm *SyncMap[K, V]) Load(key K) (V, bool) {
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val, ok := sm.m.Load(key)
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if ok {
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return val.(V), true
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}
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var zeroValue V
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return zeroValue, false
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}
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// 删除键值对
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func (sm *SyncMap[K, V]) Delete(key K) {
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sm.m.Delete(key)
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}
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// 遍历所有键值对
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func (sm *SyncMap[K, V]) Range(f func(key K, value V) bool) {
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sm.m.Range(func(key, value any) bool {
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return f(key.(K), value.(V))
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})
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}
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func main() {
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// 使用 SyncMap 存储字符串 -> int 类型的键值对
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sm1 := &SyncMap[string, int]{}
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sm1.Store("apple", 5)
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sm1.Store("banana", 10)
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// 加载并打印值
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if value, ok := sm1.Load("apple"); ok {
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fmt.Println("apple:", value)
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}
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if value, ok := sm1.Load("banana"); ok {
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fmt.Println("banana:", value)
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}
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// 使用 SyncMap 存储 int -> string 类型的键值对
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sm2 := &SyncMap[int, string]{}
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sm2.Store(1, "one")
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sm2.Store(2, "two")
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// 遍历所有键值对
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sm2.Range(func(key int, value string) bool {
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fmt.Printf("%d: %s\n", key, value)
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return true
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})
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} |