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Files
go-mixed/maps/map.go
2022-11-18 16:57:15 +08:00

53 lines
1.1 KiB
Go

package maps
import (
"strings"
"golang.org/x/exp/constraints"
)
type hashable interface {
constraints.Integer | constraints.Float | ~string
}
type Map[K hashable, V any] interface {
Set(key K, value V) // 设置值
Get(key K) (value V, ok bool) // 获取值
Exist(key K) bool // 键是否存在
Delete(key K) // 删除值
Keys() []K // 获取所有键
Values() []V // 获取所有值
ToMap() map[K]V // 转换为map
Count() int // 数量
// Iter() <-chan *Entry[K, V] // 迭代器
ForEach(f func(K, V) bool) // ForEach
}
type Entry[K hashable, V any] struct {
Key K
Value V
}
func Merge[K hashable, V any](mm ...map[K]V) map[K]V {
ret := make(map[K]V)
for _, m := range mm {
for k, v := range m {
ret[k] = v
}
}
return ret
}
// 按照键值生成字符串
func Join[K hashable, V any](m Map[K, V], sep string, f func(k K, v V) string) string {
slice := make([]string, 0, m.Count())
m.ForEach(func(k K, v V) bool {
slice = append(slice, f(k, v))
return false
})
return strings.Join(slice, sep)
}