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Exercism: Rust version of the 'Beer Song' exercise.
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ex_rust_beer-song/README.md

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initial working example
3 years ago
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  1. # Beer Song
  3. Recite the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.
  5. Note that not all verses are identical.
  7. ```text
  8. 99 bottles of beer on the wall, 99 bottles of beer.
  9. Take one down and pass it around, 98 bottles of beer on the wall.
  11. 98 bottles of beer on the wall, 98 bottles of beer.
  12. Take one down and pass it around, 97 bottles of beer on the wall.
  14. 97 bottles of beer on the wall, 97 bottles of beer.
  15. Take one down and pass it around, 96 bottles of beer on the wall.
  17. 96 bottles of beer on the wall, 96 bottles of beer.
  18. Take one down and pass it around, 95 bottles of beer on the wall.
  20. 95 bottles of beer on the wall, 95 bottles of beer.
  21. Take one down and pass it around, 94 bottles of beer on the wall.
  23. 94 bottles of beer on the wall, 94 bottles of beer.
  24. Take one down and pass it around, 93 bottles of beer on the wall.
  26. 93 bottles of beer on the wall, 93 bottles of beer.
  27. Take one down and pass it around, 92 bottles of beer on the wall.
  29. 92 bottles of beer on the wall, 92 bottles of beer.
  30. Take one down and pass it around, 91 bottles of beer on the wall.
  32. 91 bottles of beer on the wall, 91 bottles of beer.
  33. Take one down and pass it around, 90 bottles of beer on the wall.
  35. 90 bottles of beer on the wall, 90 bottles of beer.
  36. Take one down and pass it around, 89 bottles of beer on the wall.
  38. 89 bottles of beer on the wall, 89 bottles of beer.
  39. Take one down and pass it around, 88 bottles of beer on the wall.
  41. 88 bottles of beer on the wall, 88 bottles of beer.
  42. Take one down and pass it around, 87 bottles of beer on the wall.
  44. 87 bottles of beer on the wall, 87 bottles of beer.
  45. Take one down and pass it around, 86 bottles of beer on the wall.
  47. 86 bottles of beer on the wall, 86 bottles of beer.
  48. Take one down and pass it around, 85 bottles of beer on the wall.
  50. 85 bottles of beer on the wall, 85 bottles of beer.
  51. Take one down and pass it around, 84 bottles of beer on the wall.
  53. 84 bottles of beer on the wall, 84 bottles of beer.
  54. Take one down and pass it around, 83 bottles of beer on the wall.
  56. 83 bottles of beer on the wall, 83 bottles of beer.
  57. Take one down and pass it around, 82 bottles of beer on the wall.
  59. 82 bottles of beer on the wall, 82 bottles of beer.
  60. Take one down and pass it around, 81 bottles of beer on the wall.
  62. 81 bottles of beer on the wall, 81 bottles of beer.
  63. Take one down and pass it around, 80 bottles of beer on the wall.
  65. 80 bottles of beer on the wall, 80 bottles of beer.
  66. Take one down and pass it around, 79 bottles of beer on the wall.
  68. 79 bottles of beer on the wall, 79 bottles of beer.
  69. Take one down and pass it around, 78 bottles of beer on the wall.
  71. 78 bottles of beer on the wall, 78 bottles of beer.
  72. Take one down and pass it around, 77 bottles of beer on the wall.
  74. 77 bottles of beer on the wall, 77 bottles of beer.
  75. Take one down and pass it around, 76 bottles of beer on the wall.
  77. 76 bottles of beer on the wall, 76 bottles of beer.
  78. Take one down and pass it around, 75 bottles of beer on the wall.
  80. 75 bottles of beer on the wall, 75 bottles of beer.
  81. Take one down and pass it around, 74 bottles of beer on the wall.
  83. 74 bottles of beer on the wall, 74 bottles of beer.
  84. Take one down and pass it around, 73 bottles of beer on the wall.
  86. 73 bottles of beer on the wall, 73 bottles of beer.
  87. Take one down and pass it around, 72 bottles of beer on the wall.
  89. 72 bottles of beer on the wall, 72 bottles of beer.
  90. Take one down and pass it around, 71 bottles of beer on the wall.
  92. 71 bottles of beer on the wall, 71 bottles of beer.
  93. Take one down and pass it around, 70 bottles of beer on the wall.
  95. 70 bottles of beer on the wall, 70 bottles of beer.
  96. Take one down and pass it around, 69 bottles of beer on the wall.
  98. 69 bottles of beer on the wall, 69 bottles of beer.
  99. Take one down and pass it around, 68 bottles of beer on the wall.
  101. 68 bottles of beer on the wall, 68 bottles of beer.
  102. Take one down and pass it around, 67 bottles of beer on the wall.
  104. 67 bottles of beer on the wall, 67 bottles of beer.
  105. Take one down and pass it around, 66 bottles of beer on the wall.
  107. 66 bottles of beer on the wall, 66 bottles of beer.
  108. Take one down and pass it around, 65 bottles of beer on the wall.
  110. 65 bottles of beer on the wall, 65 bottles of beer.
  111. Take one down and pass it around, 64 bottles of beer on the wall.
  113. 64 bottles of beer on the wall, 64 bottles of beer.
  114. Take one down and pass it around, 63 bottles of beer on the wall.
  116. 63 bottles of beer on the wall, 63 bottles of beer.
  117. Take one down and pass it around, 62 bottles of beer on the wall.
  119. 62 bottles of beer on the wall, 62 bottles of beer.
  120. Take one down and pass it around, 61 bottles of beer on the wall.
  122. 61 bottles of beer on the wall, 61 bottles of beer.
  123. Take one down and pass it around, 60 bottles of beer on the wall.
  125. 60 bottles of beer on the wall, 60 bottles of beer.
  126. Take one down and pass it around, 59 bottles of beer on the wall.
  128. 59 bottles of beer on the wall, 59 bottles of beer.
  129. Take one down and pass it around, 58 bottles of beer on the wall.
  131. 58 bottles of beer on the wall, 58 bottles of beer.
  132. Take one down and pass it around, 57 bottles of beer on the wall.
  134. 57 bottles of beer on the wall, 57 bottles of beer.
  135. Take one down and pass it around, 56 bottles of beer on the wall.
  137. 56 bottles of beer on the wall, 56 bottles of beer.
  138. Take one down and pass it around, 55 bottles of beer on the wall.
  140. 55 bottles of beer on the wall, 55 bottles of beer.
  141. Take one down and pass it around, 54 bottles of beer on the wall.
  143. 54 bottles of beer on the wall, 54 bottles of beer.
  144. Take one down and pass it around, 53 bottles of beer on the wall.
  146. 53 bottles of beer on the wall, 53 bottles of beer.
  147. Take one down and pass it around, 52 bottles of beer on the wall.
  149. 52 bottles of beer on the wall, 52 bottles of beer.
  150. Take one down and pass it around, 51 bottles of beer on the wall.
  152. 51 bottles of beer on the wall, 51 bottles of beer.
  153. Take one down and pass it around, 50 bottles of beer on the wall.
  155. 50 bottles of beer on the wall, 50 bottles of beer.
  156. Take one down and pass it around, 49 bottles of beer on the wall.
  158. 49 bottles of beer on the wall, 49 bottles of beer.
  159. Take one down and pass it around, 48 bottles of beer on the wall.
  161. 48 bottles of beer on the wall, 48 bottles of beer.
  162. Take one down and pass it around, 47 bottles of beer on the wall.
  164. 47 bottles of beer on the wall, 47 bottles of beer.
  165. Take one down and pass it around, 46 bottles of beer on the wall.
  167. 46 bottles of beer on the wall, 46 bottles of beer.
  168. Take one down and pass it around, 45 bottles of beer on the wall.
  170. 45 bottles of beer on the wall, 45 bottles of beer.
  171. Take one down and pass it around, 44 bottles of beer on the wall.
  173. 44 bottles of beer on the wall, 44 bottles of beer.
  174. Take one down and pass it around, 43 bottles of beer on the wall.
  176. 43 bottles of beer on the wall, 43 bottles of beer.
  177. Take one down and pass it around, 42 bottles of beer on the wall.
  179. 42 bottles of beer on the wall, 42 bottles of beer.
  180. Take one down and pass it around, 41 bottles of beer on the wall.
  182. 41 bottles of beer on the wall, 41 bottles of beer.
  183. Take one down and pass it around, 40 bottles of beer on the wall.
  185. 40 bottles of beer on the wall, 40 bottles of beer.
  186. Take one down and pass it around, 39 bottles of beer on the wall.
  188. 39 bottles of beer on the wall, 39 bottles of beer.
  189. Take one down and pass it around, 38 bottles of beer on the wall.
  191. 38 bottles of beer on the wall, 38 bottles of beer.
  192. Take one down and pass it around, 37 bottles of beer on the wall.
  194. 37 bottles of beer on the wall, 37 bottles of beer.
  195. Take one down and pass it around, 36 bottles of beer on the wall.
  197. 36 bottles of beer on the wall, 36 bottles of beer.
  198. Take one down and pass it around, 35 bottles of beer on the wall.
  200. 35 bottles of beer on the wall, 35 bottles of beer.
  201. Take one down and pass it around, 34 bottles of beer on the wall.
  203. 34 bottles of beer on the wall, 34 bottles of beer.
  204. Take one down and pass it around, 33 bottles of beer on the wall.
  206. 33 bottles of beer on the wall, 33 bottles of beer.
  207. Take one down and pass it around, 32 bottles of beer on the wall.
  209. 32 bottles of beer on the wall, 32 bottles of beer.
  210. Take one down and pass it around, 31 bottles of beer on the wall.
  212. 31 bottles of beer on the wall, 31 bottles of beer.
  213. Take one down and pass it around, 30 bottles of beer on the wall.
  215. 30 bottles of beer on the wall, 30 bottles of beer.
  216. Take one down and pass it around, 29 bottles of beer on the wall.
  218. 29 bottles of beer on the wall, 29 bottles of beer.
  219. Take one down and pass it around, 28 bottles of beer on the wall.
  221. 28 bottles of beer on the wall, 28 bottles of beer.
  222. Take one down and pass it around, 27 bottles of beer on the wall.
  224. 27 bottles of beer on the wall, 27 bottles of beer.
  225. Take one down and pass it around, 26 bottles of beer on the wall.
  227. 26 bottles of beer on the wall, 26 bottles of beer.
  228. Take one down and pass it around, 25 bottles of beer on the wall.
  230. 25 bottles of beer on the wall, 25 bottles of beer.
  231. Take one down and pass it around, 24 bottles of beer on the wall.
  233. 24 bottles of beer on the wall, 24 bottles of beer.
  234. Take one down and pass it around, 23 bottles of beer on the wall.
  236. 23 bottles of beer on the wall, 23 bottles of beer.
  237. Take one down and pass it around, 22 bottles of beer on the wall.
  239. 22 bottles of beer on the wall, 22 bottles of beer.
  240. Take one down and pass it around, 21 bottles of beer on the wall.
  242. 21 bottles of beer on the wall, 21 bottles of beer.
  243. Take one down and pass it around, 20 bottles of beer on the wall.
  245. 20 bottles of beer on the wall, 20 bottles of beer.
  246. Take one down and pass it around, 19 bottles of beer on the wall.
  248. 19 bottles of beer on the wall, 19 bottles of beer.
  249. Take one down and pass it around, 18 bottles of beer on the wall.
  251. 18 bottles of beer on the wall, 18 bottles of beer.
  252. Take one down and pass it around, 17 bottles of beer on the wall.
  254. 17 bottles of beer on the wall, 17 bottles of beer.
  255. Take one down and pass it around, 16 bottles of beer on the wall.
  257. 16 bottles of beer on the wall, 16 bottles of beer.
  258. Take one down and pass it around, 15 bottles of beer on the wall.
  260. 15 bottles of beer on the wall, 15 bottles of beer.
  261. Take one down and pass it around, 14 bottles of beer on the wall.
  263. 14 bottles of beer on the wall, 14 bottles of beer.
  264. Take one down and pass it around, 13 bottles of beer on the wall.
  266. 13 bottles of beer on the wall, 13 bottles of beer.
  267. Take one down and pass it around, 12 bottles of beer on the wall.
  269. 12 bottles of beer on the wall, 12 bottles of beer.
  270. Take one down and pass it around, 11 bottles of beer on the wall.
  272. 11 bottles of beer on the wall, 11 bottles of beer.
  273. Take one down and pass it around, 10 bottles of beer on the wall.
  275. 10 bottles of beer on the wall, 10 bottles of beer.
  276. Take one down and pass it around, 9 bottles of beer on the wall.
  278. 9 bottles of beer on the wall, 9 bottles of beer.
  279. Take one down and pass it around, 8 bottles of beer on the wall.
  281. 8 bottles of beer on the wall, 8 bottles of beer.
  282. Take one down and pass it around, 7 bottles of beer on the wall.
  284. 7 bottles of beer on the wall, 7 bottles of beer.
  285. Take one down and pass it around, 6 bottles of beer on the wall.
  287. 6 bottles of beer on the wall, 6 bottles of beer.
  288. Take one down and pass it around, 5 bottles of beer on the wall.
  290. 5 bottles of beer on the wall, 5 bottles of beer.
  291. Take one down and pass it around, 4 bottles of beer on the wall.
  293. 4 bottles of beer on the wall, 4 bottles of beer.
  294. Take one down and pass it around, 3 bottles of beer on the wall.
  296. 3 bottles of beer on the wall, 3 bottles of beer.
  297. Take one down and pass it around, 2 bottles of beer on the wall.
  299. 2 bottles of beer on the wall, 2 bottles of beer.
  300. Take one down and pass it around, 1 bottle of beer on the wall.
  302. 1 bottle of beer on the wall, 1 bottle of beer.
  303. Take it down and pass it around, no more bottles of beer on the wall.
  305. No more bottles of beer on the wall, no more bottles of beer.
  306. Go to the store and buy some more, 99 bottles of beer on the wall.
  307. ```
  309. ## For bonus points
  311. Did you get the tests passing and the code clean? If you want to, these
  312. are some additional things you could try:
  314. * Remove as much duplication as you possibly can.
  315. * Optimize for readability, even if it means introducing duplication.
  316. * If you've removed all the duplication, do you have a lot of
  317. conditionals? Try replacing the conditionals with polymorphism, if it
  318. applies in this language. How readable is it?
  320. Then please share your thoughts in a comment on the submission. Did this
  321. experiment make the code better? Worse? Did you learn anything from it?
  323. ## Rust Installation
  325. Refer to the [exercism help page][help-page] for Rust installation and learning
  326. resources.
  328. ## Writing the Code
  330. Execute the tests with:
  332. ```bash
  333. $ cargo test
  334. ```
  336. All but the first test have been ignored. After you get the first test to
  337. pass, open the tests source file which is located in the `tests` directory
  338. and remove the `#[ignore]` flag from the next test and get the tests to pass
  339. again. Each separate test is a function with `#[test]` flag above it.
  340. Continue, until you pass every test.
  342. If you wish to run all ignored tests without editing the tests source file, use:
  344. ```bash
  345. $ cargo test -- --ignored
  346. ```
  348. To run a specific test, for example `some_test`, you can use:
  350. ```bash
  351. $ cargo test some_test
  352. ```
  354. If the specific test is ignored use:
  356. ```bash
  357. $ cargo test some_test -- --ignored
  358. ```
  360. To learn more about Rust tests refer to the [online test documentation][rust-tests]
  362. Make sure to read the [Modules][modules] chapter if you
  363. haven't already, it will help you with organizing your files.
  365. ## Further improvements
  367. After you have solved the exercise, please consider using the additional utilities, described in the [installation guide](https://exercism.io/tracks/rust/installation), to further refine your final solution.
  369. To format your solution, inside the solution directory use
  371. ```bash
  372. cargo fmt
  373. ```
  375. To see, if your solution contains some common ineffective use cases, inside the solution directory use
  377. ```bash
  378. cargo clippy --all-targets
  379. ```
  381. ## Submitting the solution
  383. Generally you should submit all files in which you implemented your solution (`src/lib.rs` in most cases). If you are using any external crates, please consider submitting the `Cargo.toml` file. This will make the review process faster and clearer.
  385. ## Feedback, Issues, Pull Requests
  387. The [exercism/rust](https://github.com/exercism/rust) repository on GitHub is the home for all of the Rust exercises. If you have feedback about an exercise, or want to help implement new exercises, head over there and create an issue. Members of the rust track team are happy to help!
  389. If you want to know more about Exercism, take a look at the [contribution guide](https://github.com/exercism/docs/blob/main/contributing-to-language-tracks/README.md).
  391. [help-page]: https://exercism.io/tracks/rust/learning
  392. [modules]: https://doc.rust-lang.org/book/ch07-02-defining-modules-to-control-scope-and-privacy.html
  393. [cargo]: https://doc.rust-lang.org/book/ch14-00-more-about-cargo.html
  394. [rust-tests]: https://doc.rust-lang.org/book/ch11-02-running-tests.html
  396. ## Source
  398. Learn to Program by Chris Pine [http://pine.fm/LearnToProgram/?Chapter=06](http://pine.fm/LearnToProgram/?Chapter=06)
  400. ## Submitting Incomplete Solutions
  401. It's possible to submit an incomplete solution so you can see how others have completed the exercise.