View Source Credo.Check.Refactor.AppendSingleItem (Credo v1.7.8)

Basics

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This check is tagged :controversial

This means that this check is more opinionated than others and not for everyone's taste.

This check has a base priority of low and works with any version of Elixir.

Explanation

When building up large lists, it is faster to prepend than append. Therefore: It is sometimes best to prepend to the list during iteration and call Enum.reverse/1 at the end, as it is quite fast.

Example:

list = list_so_far ++ [new_item]

# refactoring it like this can make the code faster:

list = [new_item] ++ list_so_far
# ...
Enum.reverse(list)

Check-Specific Parameters

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General Parameters

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