weakmap

A generic cache map implementation with weak pointers as described on the Go blog.

Usage

To initialize a Map instance, provide a method for instantiating new values given a key.

m := Map[int, string]{
    New: func(key int) *string {
        value := strconv.Itoa(key)
        return &value
    },
}

k := 1
v := m.Load(k) // *v == "1"

Instances are safe for concurrent use but should not be copied.