There is this common saying about interviews
Just use a hash map
What are maps?
its too easy to think of {} or new Map() and just assume we know them. The
reality is that we know how to use them, most of the time we don't actually
know they work.
(we wont demistify {}, those are different data structures than a hash map)
Terms
load factor: The amount of data points vs the amount of storage (data.len / storage.capacity)
key: a value that is hashable and is used to look up data. The hash has to be consistent.
value: a value that is associated with a key
collision: when 2 keys map to the same cell.
Lets whiteboard what is happening
- Insertion
- Deletion
- Collisions
- Running Time