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Mis juhtub, kui erinevad sisendandmed annavad sama hash-väärtuse hash-tabelis?

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Vastus AI-lt

When different input data produce the same hash value in a hash table, this is called a collision. In this case, the hash table must handle the situation correctly to preserve all elements.

In Go (Golang), collisions are handled using methods similar to chaining or open addressing:

  • Chaining: in one cell of the hash table, a list of elements with the same hash is stored. When a collision occurs, the new element is added to this list.

  • Open addressing: in case of a collision, the next free cell is searched according to a specific algorithm (e.g., linear or quadratic probing).

In the standard implementation of map in Go, a complex mechanism with dynamic redistribution of elements and multiple levels of hashing is used to minimize collisions and ensure high performance.

Therefore, when different data have the same hash value, they are not lost, but the hash table stores them correctly, providing access via the key.