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exercism
Implement new Concept Exercise: `dynamic-dispatch`
Getting started
Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read up on the following documents:
Goal
The goal of this exercise is to replace rpn-calculator-output as the exercise that teaches dynamic dispatch (https://elixir-lang.org/getting-started/typespecs-and-behaviours.html#dynamic-dispatch). rpn-calculator-output should be modified to depend on dynamic-dispatch instead of teaching it. Make sure to reuse part of that exercise's introduction.
Learning objectives
- Know that you module names are just atoms
- Know that you can call a function on a module even if its stored in a variable
-
apply - Know how to concatenate module names? e.g. https://hexdocs.pm/elixir/Module.html#safe_concat/1
Out of scope
?
Concepts
-
dynamic-dispatch
Prerequisites
Depends on the story.
Exercises
Add dynamic-dispatch as a prerequisite of forth.
Resources to refer to
https://elixir-lang.org/getting-started/typespecs-and-behaviours.html#dynamic-dispatch
Implementing
Since dynamic dispatch depends on the existence of a few modules with the same function, we might want to provide that in the boilerplate instead of having the student implement those too.
Help
If you have any questions while implementing the exercise, please post the questions as comments in this issue.
Hello!
The link under resources leading not to where it expected. Is there still a thing in Elixir such as dynamic-dispatch?
@zxdsc This link https://hexdocs.pm/elixir/Kernel.html#apply/3 ? Yes, that's exactly the function that allows you to do dynamic dispatch in Elixir