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| foo $ tree | |
| . | |
| ├── a | |
| │ ├── 1.m4a | |
| │ ├── 1.mp3 | |
| │ └── 2.mp3 | |
| ├── b | |
| │ ├── 3.m4a | |
| │ ├── 3.mp3 | |
| │ ├── 4.mp3 | |
| │ ├── 5.m4a | |
| │ └── 5.mp3 | |
| ├── c | |
| │ ├── 6.mp3 | |
| │ ├── 7.m4a | |
| │ ├── 7.mp3 | |
| │ ├── 8.m4a | |
| │ └── 8.mp3 | |
| └── sad.rb | |
| 3 directories, 14 files | |
| foo $ | |
| foo $ ruby sad.rb | |
| ["a/1.m4a", "b/5.m4a", "b/3.m4a", "c/8.m4a", "c/7.m4a"] | |
| foo $ | |
| foo $ cat sad.rb | |
| require 'fileutils' | |
| m4a = Dir['**/*.m4a'] | |
| mp3 = Dir['**/*.mp3'] | |
| have = m4a & mp3.map { |f| f.sub /mp3$/, 'm4a' } | |
| p have | |
| # FileUtils.rm have |
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m4a = Dir['/*.m4a']
mp3 = Dir['/*.mp3']
File.dirname(mp3) + '/' + File.basename(mp3).split.('.')[0]