feat: implement custom hash map

[RodionPlakhotniuk]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your implementation fully satisfies all HashMap requirements. The core functionality is correctly implemented: the put method properly handles collisions through chaining and updates existing keys, getValue returns the correct value or null, and getSize accurately tracks the entry count. All required features are present including the initial capacity of 16, load factor of 0.75, and automatic resizing. The code follows best practices with magic numbers extracted as constants (DEFAULT_CAPACITY, LOAD_FACTOR, RESIZE_MULTIPLIER), proper use of generics on the Node class, and appropriate access modifiers with private utility methods after public API. The implementation is clean, well-structured, and meets all checklist criteria.

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