How is the data structure map implemented for storing and accessing key-value pairs within the system?

In Go, the data structure map is implemented as a hash table that provides fast access to values by keys. When adding a key-value pair, the key is hashed, and the hash determines the index in the bucket array where the value is stored.

Main implementation points:

• Open addressing with chaining is used to resolve collisions.
• In case of collisions, elements are stored in linked lists within the buckets.
• When the number of elements grows, reorganization (rehash) occurs to maintain performance.

Example of using map in Go:

m := make(map[string]int)
m["apple"] = 5
value, exists := m["apple"]
if exists {
    fmt.Println("Value for 'apple':", value)
}