GetOrDefault retrieves the value for the key in the map if it exists.

MapSlice converts a slice of type K into a slice of type V using the provided mapper function.

MergeMaps merges multiple maps into a new one.

NewPair creates a new Pair with key and value.

NewSet creates a new Set with the keys provided.

WithNewKeys re-maps every key in a map as dictated by the mapper.

Pair is a struct with a K key and V value.

Set is a map with a comparable K key and no meaningful value.