Code Kata: <name it>

What code kata do you choose to solve today? Explain the game rules here. Please keep explanations below about the boilerplate as it is.

Code Kata Boilerplate for Java 8

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Getting started

Firstly, either you fork this repository to put all your katas in the same repository, either you create a new repository per kata and push the kata boilerplate into it. Then replace the artifact coordinates used by the build system. Name the code kata too.
Make changes only in the "kata" branch.
You can use this shortened link if needed: tinyurl.com/yyekn5rf.

Tips

You may want to commit with another identifier to publish your code later. Nothing's easier:

git config user.email "public@example.com"
git config user.name "Your Pseudo" # if needed

Take advantage of your IDE shortcuts while resolving any code kata. Download and print the keymap of IntelliJ IDEA. The table below should be very useful to learn, or to learn again, the most important shortcuts.

Theme	Must Know	Should Know	Could Know
General		Ctrl + Alt + S to open settings	Ctrl + Shift + A to find action
Editing	Ctrl + Space to call basic code completion Shift + Enter to start new line Ctrl + Alt + L to auto-indent lines Ctrl + Y to delete line at caret Ctrl + Numpad +/- to expand/collapse code block	Ctrl + X to cut current line to clipboard Ctrl + Q to call quick documentation lookup Alt + Inser to generate code...
Refactoring	Shift + F6 to rename	Ctrl + Alt + M to extract method Ctrl + Alt + V to extract variable Ctrl + Alt + F to extract field Ctrl + Alt + C to extract constant Ctrl + Alt + P to extract parameter
Navigation	Ctrl + N to go to class Ctrl + Shift + N to go to file Alt + PageUp/PageDown* to navigate back / forward Ctrl + B to go to declaration Ctrl + Alt + B to go to implementation(s)	Ctrl + G to go to line
Compile and Run		Shift + F10 / F9 to run / debug Ctrl + Shift + F10 to run contexte configuration from editor
Usage Search	Alt + F7 to find usages Ctrl + Alt + F7 to show usages

If a shortcut is marked with a '*', it is to configure in the keymap settings of the IDE.

Command Line Interface as a GUI

You can invoke a standalone JAR after building it with the "standalone" Maven profile.

mvn package -Pstandalone # to build it
java -jar target/kata-standalone.jar # to use it

Updating your fork

Update your fork as follows. It is assumed you did not commit in the "master" branch. Otherwise please send me a pull request.

git fetch origin master && git rebase -p --onto origin/master master develop && git branch -f master origin/master

Working on a code kata

Definition of Ready (DoR)

What should be a DoR for the code katas, that is to say to be ready before coding, whether at home or in a coding dojo, while using this code boilerplate?

• Git is ready-to-use.
• The Java SE Development Kit is installed.
• The IDE is installed and configured, preferably IntelliJ IDEA.
• Apache Maven is ready-to-use.
• The build of the code kata boilerplate is successful, in command line as well as in the IDE.

Definition of Done (DoD)

What should be a DoD for the code katas?

• The kata is done by applying Test-Driven Development (TDD).
• The code is versioned by applying TDDflow.
• The path to the solution is discovered according to the Transformation Priority Premise.
• The path of successive transformations is as simple as possible.
• The code coverage is greater than 95%.
• The problem to solve is described in the kata documentation.

License

This code kata boilerplate is distributed under the GNU GPLv3 license. The GPLv3 license is included in the LICENSE.txt file. More information about this license is available at GNU.org.