Map with concurrent access

Question

When you use a map in a program with concurrent access, is there any need to use a mutex in functions to read values?

Answer 1

You could use concurrent-map to handle the concurrency pains for you.

// Create a new map.
map := cmap.NewConcurrentMap()

// Add item to map, adds "bar" under key "foo"
map.Add("foo", "bar")

// Retrieve item from map.
tmp, ok := map.Get("foo")

// Checks if item exists
if ok == true {
    // Map stores items as interface{}, hence we'll have to cast.
    bar := tmp.(string)
}

// Removes item under key "foo"
map.Remove("foo")