28 lines
1.3 KiB
Markdown
28 lines
1.3 KiB
Markdown
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# Hints
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## General
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- Read about [comprehensions][elixir-comprehensions] in the Getting Started guide.
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- Read about [lists][elixir-lists] in the Getting Started guide.
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- Read about [maps][elixir-maps] in the Getting Started guide.
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- Read about [keyword Lists][elixir-kwlists] in the Getting Started guide.
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## 1. Suggest a combination
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- In the list comprehension, use two _generators_ to create the cartesian product.
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## 2. Filter out clashing outfits
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- You can use _pattern matching_ to deconstruct in the _generator_ to bind the fields to a variable.
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- Use a _filter_ expression to return false when the base colors match.
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## 3. Filter by combination price
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- There a number of [keyword list functions][kw-module] available to use to retrieve options from a keyword list.
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- Use a _filter_ expression to return false when the combined price is greater than the maximum price.
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[elixir-lists]: https://elixir-lang.org/getting-started/basic-types.html#linked-lists
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[elixir-maps]: https://elixir-lang.org/getting-started/keywords-and-maps.html#maps
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[elixir-kwlists]: https://elixir-lang.org/getting-started/keywords-and-maps.html#keyword-lists
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[elixir-comprehensions]: https://elixir-lang.org/getting-started/comprehensions.html
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[kw-module]: https://hexdocs.pm/elixir/Keyword.html
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