This is a collection of the things I believe about software development. I have worked for years building backend and data processing systems, so read the below within that context.
Agree? Disagree? Feel free to let me know at @JanStette. See also my blog at www.janvsmachine.net.
Keep it simple, stupid. You ain't gonna need it.
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A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.
val square : Int => Int = x => x * x
Here is a fast explanation on this study for Freek to improve compile-time:
https://github.com/ProjectSeptemberInc/freek/blob/optim/cop/src/main/scala/CoproductK.scala#L14-L34
In Freek, Higher-Kinded Coproduct was based on Shapeless HList/Coproduct representation like:
sealed trait CoproductK[A] extends Product with Serializable
sealed trait CNilK[A] extends CoproductK[A]
| RSpec.configure do |config| | |
| config.filter_run_excluding :show_me_the_pages unless ENV["SHOW_ME_THE_PAGES"] | |
| end | |
| class Screenshots | |
| include Capybara::DSL | |
| attr_accessor :resolutions | |
| attr_accessor :output_path |
There are many different provisioning tools out there, the most popular of which are Chef and Puppet. Chef uses Ruby, Puppet uses a DSL (Domain Specific Language), there are others that use simple bash too, but today we're going to focus on Chef Solo.
To get Chef working properly on your local machine you need a few things.
Make sure you use Ruby 1.9.x and not Ruby 2.x as you will get errors with the json 1.6.1 gem on 2.x. Use rbenv or RVM to manage several different Rubies on the one machine.
This tutorial guides you through creating your first Vagrant project.
We start with a generic Ubuntu VM, and use the Chef provisioning tool to:
Afterwards, we'll see how easy it is to package our newly provisioned VM
