Mis on map Go-s? Kuidas see sisemiselt töötab? Mis juhtub kokkupõrke korral?

In Go, a map is a built-in data type for storing key-value pairs with fast access via the key.

Under the hood, the map is implemented as a hash table with open addressing and use of buckets. Each bucket contains multiple elements, which helps reduce collisions.

When adding an element, the key is hashed, and the hash determines the bucket. If the bucket already contains elements with a different key, a collision occurs. In this case, new elements are added to the bucket, and during search, elements within the bucket are traversed to compare keys.

If the number of elements in a bucket becomes too large, a rehash is performed with an increased number of buckets to maintain performance.

Example of using a map in Go:

m := make(map[string]int)
m["apple"] = 5
fmt.Println(m["apple"]) // 5

Thus, the map provides efficient access and data storage through hashing and collision management within buckets.