Keyword.has_key-question-mark

You're seeing just the function has_key-question-mark, go back to Keyword module for more information.

has_key?(keywords, key)

has_key?(t(), key()) :: boolean()

Returns whether a given key exists in the given keywords.

iex> Keyword.has_key?([a: 1], :a)
true
iex> Keyword.has_key?([a: 1], :b)
false