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Problems and Solutions: Elixircards coding quiz at Code Elixir LDN 2019
When a list in Elixir contains tuples, where the first element is an atom and the second element is a value of any term, it is considered a keyword list. Keyword lists have a special visual representation, and the square brackets can be omitted if the keyword list is the last argument of a function or macro call, or is the last element in a tuple.
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