Elixir Collections

Enum and Stream are the main workhorses for transforming immutable collections without losing readability.

Enum

Enum gives eager collection operations such as map, filter, reduce, and chunking.

Stream

Stream lets you build lazy pipelines for large or incremental data processing.

Immutability

Every update returns a new value, so you must think in terms of transformation instead of mutation.

Practice

  1. Write one Enum pipeline.
  2. Write one Stream pipeline.
  3. Explain when lazy processing helps more than eager processing.