February 20, 2024

Improving Elixir's Enum.find with Default Values

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Improving Elixir's Enum.find with Default Values

Source: elixirstreams.com

The author explains a common issue in Elixir programming where using Enum.find/2 might return a nil value when an item is not found in a collection. To address this, a variant Enum.find/3 allows the developer to specify a default value to be returned instead of nil, preventing potential problems caused by nil values propagating through the system. The author suggests that using Enum.find/3 with a default value is particularly useful when it is part of a larger function within a domain, providing an example where a function is used to find a user by ID within a collection of users and returns a :not_found atom if the user doesn't exist.

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