2017 melb.jvm: "the hills are alive with the sound of your crappy code! "
TRANSCRIPT
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The hills are alive... with the sound of your
crappy code
The hills are alive... with the sound of your
crappy code
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Background
https://www.youtube.com/watch?v=Sg2BjFQnr9shttps://www.youtube.com/watch?v=063FTX4FE3g
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Agenda
● Music theory redux● Aeolian ● Design choices (& examples)
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Music theory redux
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Tempo KeyNote OctaveChord
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github.com/andeemarks/aeolian
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Java source metrics ⇨ “music”
“the aeolian tonic chord is the submediant minor triad”
One note per line of code
Make good quality code pleasant to listen to
Make poor quality code unpleasant to listen to
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Tool chain
abc2midi timidityaeoliancheckstylebash
metrics
.abc
.midi
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Aeolian/Hello World
public class HelloWorld {public static void main(String args[]) {
System.out.println("Hello World!");}
}
X:1T:HelloWorld.metricsC:AEOLIANM:4/4L:1/8Q:1/4=140K:C%%MIDI gchord c| "C"E c b E, E, E, |
X:1T:HelloWorld.metricsC:AEOLIANM:4/4L:1/8Q:1/4=140K:C%%MIDI gchord c| "C"E c b E, E, E, |
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ABC Notation
X:1T:HelloWorld.metricsC:AEOLIANM:4/4L:1/8Q:1/4=140K:C%%MIDI gchord c| "C"E c b E, E, E, |
Tempo
Key
Octave
Note
Chord
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Design Choices
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Design Choices #1/Notes
<module name="LineLength">
(cond(< line-length 10)(note-from-octave octave-1 line-length)
(<= 10 line-length 39) (note-from-octave octave-2 line-length)
(<= 40 line-length 79) (note-from-octave octave-3 line-length)
...Notes
checkstyle
clojure
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Design Choices #2/Tempo
<module name="CyclomaticComplexity">
Tempo
checkstyle
(+ (* 20 complexity) default-tempo)
clojure
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Design Choices #3/Key
Keys
<module name="SimianCheck">
checkstyle
(if (< duplication-percentage 10)(set-major-key)(set-minor-key)))
clojure
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Design Choices #4/Accompanying chord
<module name="MethodLength">
checkstyle
(cond(<= 1 method-length 5)(chord 0)
(<= 6 line-length 10) (chord 1)
(<= 11 line-length 15) (chord 2)
...
clojure
Chord
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Design Choices #5/Instruments
(if (not (= current-author (get-author)))(instrument-for current-author)
clojure
Instruments
git blame...
bash
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Design Choices #6/Lyrics
(if (not (= current-source-file (get-source-file)))(lyrics-for current-source-file)
clojure
Lyrics
“Doe - a deerA female deerRay - a drop Of golden sunMe - a nameTo call myself”...
“Doe - a deerA female deerRay - a drop Of golden sunMe - a nameTo call myself”...
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Design Choices #7/Sequencing
Sequencing
git blame… sort…
bash
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Design Choices/Unresolved/Discarded
Comments
/**
**/
Volume Length
Note length Editor integration
Stereo
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Conclusion
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Line length ⇨ Note/octave
Cyclomatic complexity ⇨ Tempo
Method length ⇨ Accompanying chord
Duplication ⇨ Key
Git commit author ⇨ Instrument
Source file name ⇨ Karaoke lyric (for lolz)
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Conclusion
Thank You!Thank You!