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Slides from my lightning talk on Dependency Injection at Scala Central #5.

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# Approaches to Dependency Injection in Scala<br>(aka "99 Ways to DI")

Slides for my lightning talk on dependency injection at [Scala Central #5][scala-central].

## Related Material

The Keynote and PDF contain speaker notes to help explain what I'm talking about.
You can also find a video of the talk on the [Scala Central Youtube channel][youtube].
Here are the references from the end of the talk.

DI approaches covered in this talk:

- [Krzysztof Pado - Dependency injection in Play Framework using Scala](http://www.schibsted.pl/blog/dependency-injection-play-framework-scala)
- [Macwire User Guide (project README)](https://github.com/adamw/macwire)
- [Google Guice User Guide](https://github.com/google/guice/wiki/Motivation)
- [Adam Warski - Using Scala traits as modules, or the "Thin Cake" Pattern](http://www.warski.org/blog/2014/02/using-scala-traits-as-modules-or-the-thin-cake-pattern)
- [Mark Harrison - Cake Pattern in Depth](http://www.cakesolutions.net/teamblogs/2011/12/19/cake-pattern-in-depth)
- [Andrew Rollins - The Cake Pattern in Scala - Self Type Annotations vs. Inheritance](http://www.andrewrollins.com/2014/08/07/scala-cake-pattern-self-type-annotations-vs-inheritance)

Functional approaches to DI...

- [Mark Seemann - Dependency injection is passing an argument](http://blog.ploeh.dk/2017/01/27/dependency-injection-is-passing-an-argument)
- [Mark Seemann - Partial application is dependency injection](http://blog.ploeh.dk/2017/01/30/partial-application-is-dependency-injection)
- [Mark Seemann - Dependency rejection](http://blog.ploeh.dk/2017/02/02/dependency-rejection)

The Reader monad...

- [Jason Arhart - Scrap Your Cake Pattern Boilerplate: DI Using the Reader Monad](http://blog.originate.com/blog/2013/10/21/reader-monad-for-dependency-injection/)

The Free monad...

- [Pere Villega - On Free Monads](http://perevillega.com/understanding-free-monads)
- [Pere Villega - Free Monads using FreeK](http://perevillega.com/freek-and-free-monads)

## 99 Ways to DI

I originally gave this talk with the alternative title "99 Ways To DI",
a reference to the Megadeth track "99 Ways To Die"
(a favorite track of mine in my youth).
I included several images of Megadeth lead singer/guitarist Dave Mustaine.
I've removed these images in this version of the slides
to allow me to distribute the content under a Creative Commons license.

[scala-central]: http://linuxrecruit.co.uk/blog?title=Scala%20Central%20February%202017
[youtube]: https://www.youtube.com/watch?v=OJe0Dm3t5wQ
[text-license]: https://creativecommons.org/licenses/by-sa/3.0/

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