Elixir pattern-matching
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Learn how pattern matching parameters can greatly improve your code, all while building a Hex package.
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Elixir pattern-matching
- 1. Real Prizes in Video Games! 1Confidential – Do not distribute
- 2. 2 PROBLEM add analytics, but avoid app failures SOLUTION get values when present, else, return nil REFACTOR better code with pattern matching (and Hex!) SAVVY PATTERN MATCHING Confidential – Do not distribute
- 3. Confidential – Do not distribute PROBLEM 3
- 4. Confidential – Do not distribute SOLUTION 4
- 5. Confidential – Do not distribute Unpack 5
- 6. Confidential – Do not distribute 6 Unpack
- 7. Confidential – Do not distribute 7 Unpack
- 8. Confidential – Do not distribute It works! 8
- 9. Confidential – Do not distribute Github 9
- 10. Confidential – Do not distribute Hex 10
- 11. Confidential – Do not distribute Hex 11
- 12. Confidential – Do not distribute Unpack 12 $ mix new unpack
- 13. Confidential – Do not distribute Unpack 13 $ cd unpack
- 14. Confidential – Do not distribute Unpack 14 /mix.exs
- 15. Confidential – Do not distribute Unpack 15 /mix.exs - add documentation details
- 16. Confidential – Do not distribute Unpack 16 /mix.exs - add deps - add package
- 17. Confidential – Do not distribute Unpack 17 lib/unpack.ex $ mix docs
- 18. Confidential – Do not distribute Unpack 18 /doc/Unpack.html https://hexdocs.pm/un pack/Unpack.html
- 19. Confidential – Do not distribute Unpack 19 $ mix hex.user register $ mix hex.build $ mix hex.publish
- 20. Confidential – Do not distribute HEX Blackode 20 https://medium.com/blackode/how-to-write-elixir-packages-and-publish-to-hex-pm-8723038ebe76
- 21. Confidential – Do not distribute HEX Todd Resudek 21 https://www.youtube.com/watch?v=cbCnTKVLuu8
- 22. Confidential – Do not distribute REFACTOR 22
- 23. Confidential – Do not distribute REFACTOR 23
- 24. Confidential – Do not distribute REFACTOR 24
- 25. Confidential – Do not distribute 25 TL;DR 1 Functions => Input, Work, Output 2 Hex is easy! 3 Elixir pattern matching is savvy! What did we learn?
- 26. Confidential – Do not distribute THANK YOU @mrdougwright 26
Editor's Notes
- Map.get fails if developer is not loaded, can’t get to game.
- Input - struct or map, list of keys Work - for each key in our list, extract the value; repeat Output - the value (result) or nil
- Input - struct or map, list of keys Work - for each key in our list, extract the value; repeat Output - the value (result) or nil Loop over list of keys Starting Accumulator is the object or map passed in as 1st arg to `get` Invoke `extract_value` for each key. The result returned by the function (val) is used as the accumulator for the next iteration. Pass the key and new accumulator to extract_value.
- Inputs - value and key Work - Map.get Output - nil or result
- Create a new mix project
- Project is ready to become an Elixir drop! (i.e. package)
- deps() is empty
- Dependencies can be optional Include ex_doc for testing in dev mode A list of files and directories to include in the package. Defaults to standard project directories, so you usually don't need to set this property.
- Add documentation!
- Add documentation!
- register, build, publish Have 1 hour to make changes without updating your release version.