28 lines
1.2 KiB
Markdown
28 lines
1.2 KiB
Markdown
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# Hints
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## General
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- Read about [errors][getting-started-errors] in the Getting Started guide.
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- Read about [`defexception`][defexception] in the documentation.
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- Read about the [`Exception` behaviour][exception-behaviour] in the documentation.
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- Read the code snippets from the introduction.
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## 1. Error for Division by Zero
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- Implement the module, specifying the message using a special [built-in macro for defining exceptions][defexception].
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- Modules can be nested inside of other modules.
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## 2. Error when encountering stack underflow
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- Implement the module, specifying the message using a special [built-in macro for defining exceptions][defexception].
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- You can use one of the Exception Behaviour callbacks to define an exception whose message changes based on the arguments passed to `raise/2`.
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- Modules can be nested inside of other modules.
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## 3. Write a dividing function
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- Write a multi-clause function using guards for control-flow.
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- You can pattern match in the function argument list to bind the stack's values to variables.
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[getting-started-errors]: https://hexdocs.pm/elixir/try-catch-and-rescue.html#errors
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[defexception]: https://hexdocs.pm/elixir/Kernel.html#defexception/1
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[exception-behaviour]: https://hexdocs.pm/elixir/Exception.html
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