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![Code
var file = '/my/music/file.mp3';
var vlcPath = '/Applications/VLC.app/Contents/MacOS/VLC';
var vlc = spawn(vlcPath, [
'-R',
'--sout=#transcode {acodec = alac channels = 2, samplerate =
44100}: raop{host=10.0.1.13,volume=255}',
file
]);
vlc.stdout.setEncoding('utf8');
vlc.stderr.setEncoding('utf8');
vlc.stdout.on('data', process.stdout.write);
vlc.stderr.on('data', process.stderr.write);
vlc.on('exit', function(code, signal) {
console.log('vlc exit: %i %s', code, signal);
});
Donnerstag, 29. September 2011](https://image.slidesharecdn.com/node-js-alarmclock-110929091901-phpapp02/75/Building-an-alarm-clock-with-node-js-32-2048.jpg)
Uploaded byFelix Geisendörfer
Building an alarm clock with node.js
Felix Geisendörfer discusses how he hacked together a node.js alarm clock to help him wake up earlier in the morning. He talks about how previous attempts like behavioral conditioning and multiple alarms did not work. His node.js solution reliably wakes him up at any time he chooses by playing music through VLC. He then contrasts hacking, which is playful cleverness, with engineering, which is the rigorous application of science. While hacking can be a good solution, engineering is needed for things like libraries, domain logic, and performance. The talk encourages hacking to start but engineering more complex problems.
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Building an alarm clock with node.js
- 1. Building an alarmclock with node.js or Hacking vs. Engineering Felix Geisendörfer 29.09.2011 (v1) Donnerstag, 29. September 2011
- 2. Text Welcome to the Siesta right-after-lunch Session! Donnerstag, 29. September 2011
- 3. Building an alarmclock with node.js or Hacking vs. Engineering Felix Geisendörfer 29.09.2011 (v1) Donnerstag, 29. September 2011
- 4. @felixge Twitter / GitHub / IRC Donnerstag, 29. September 2011
- 5. My Problem • Getting up early in the morning • That means before 12:00 (noon) Donnerstag, 29. September 2011
- 6. This talk • How I solved this problem • Hacking vs. Engineering the solution Donnerstag, 29. September 2011
- 7. Patient History • 23 years • Working from home • Can work any hours Donnerstag, 29. September 2011
- 8. So why getup early? • To get more stuff done ... Donnerstag, 29. September 2011
- 9. Previous attempts Donnerstag, 29.September 2011
- 10. Text Behavioral Conditioning Donnerstag, 29. September 2011
- 11. Text Flying alarm clock Donnerstag, 29. September 2011
- 12. Text Circadian rhythm app (Sleep Cycle) Donnerstag, 29. September 2011
- 13. Text Many alarms Donnerstag, 29. September 2011
- 14. Nothing was working Donnerstag,29. September 2011
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- 22. The Script https://gist.github.com/1a40a207cf6132f77efa Donnerstag, 29. September 2011
- 23. sudo ./alarm.js 730 Donnerstag, 29. September 2011
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- 25. Result • Reliably waking up at any time • Get to choose different music every night Donnerstag, 29. September 2011
- 26. Hacking vs. Engineering Donnerstag,29. September 2011
- 27. (Software) Engineering “Rigorous application of science” Donnerstag, 29. September 2011
- 28. Hacking “Playful cleverness” Donnerstag, 29. September 2011
- 29. Hacking vs. Engineering this project Donnerstag, 29. September 2011
- 30. Tests? Engineering: Yes Hacking: Maybe Donnerstag, 29. September 2011
- 31. Airtunes? Engineering: Implement protocol Hacking: Piggyback on iTunes or VLC Donnerstag, 29. September 2011
- 32. Code var file = '/my/music/file.mp3'; var vlcPath = '/Applications/VLC.app/Contents/MacOS/VLC'; var vlc = spawn(vlcPath, [ '-R', '--sout=#transcode {acodec = alac channels = 2, samplerate = 44100}: raop{host=10.0.1.13,volume=255}', file ]); vlc.stdout.setEncoding('utf8'); vlc.stderr.setEncoding('utf8'); vlc.stdout.on('data', process.stdout.write); vlc.stderr.on('data', process.stderr.write); vlc.on('exit', function(code, signal) { console.log('vlc exit: %i %s', code, signal); }); Donnerstag, 29. September 2011
- 33. Wakeup from Sleep? Engineering: pmset schedule wakeorpoweron <datetime> Hacking: pmset schedule wakeorpoweron MTWRFSU <time> Donnerstag, 29. September 2011
- 34. Code var powerCmd = sprintf( 'pmset repeat wakeorpoweron MTWRFSU %02d:%02d:00', powerHour, powerMinute ); exec(powerCmd, function(err) { if (err) throw err; process.setuid('felix'); }); Donnerstag, 29. September 2011
- 35. Turn off speakers? Engineering: Install speakers in unreachable place. Hacking: ? Donnerstag, 29. September 2011
- 36. Text Duct Tape Donnerstag, 29. September 2011
- 37. Duct Tape ofConcurrent I/O Donnerstag, 29. September 2011
- 38. Engineering Solution forConcurrency Donnerstag, 29. September 2011
- 39. Why am Italking about this? Donnerstag, 29. September 2011
- 40. JS has avery hacker-driven culture Donnerstag, 29. September 2011
- 41. Text Duct tape of the web Donnerstag, 29. September 2011
- 42. Text Duct tape of the DOM Donnerstag, 29. September 2011
- 43. • Hacking islots of fun, go do it! • Hacking can be a good solution! • But be aware that many problems call for an engineering approach. Donnerstag, 29. September 2011
- 44. Where we needmore engineering: • Libraries • Domain logic • Performance Donnerstag, 29. September 2011
- 45. TL;DL • Hack when in doubt • Engineer when clear Donnerstag, 29. September 2011
- 46. Hacking Engineering Donnerstag, 29.September 2011
- 47. Questions? @felixge Donnerstag, 29. September 2011