Rails 的單複數轉換怎麼實做的呢？

很多人看到 Ruby on Rails 的單複數轉換，就覺得很神奇，怎麼可能會有那麼聰明的機制可以作到。別以為 Ruby on Rails 那麼神，還內建英漢字典 XD 根據這篇的說法，其實這只是一個小技巧，作法看這篇下面的程式碼。他絕對不只看字尾是 y 還是 s 去作判斷，而是有一個小小的詞庫判斷字尾以及特殊字。雖然這無法做到全部單字單複數轉換，不過其實也差不多了，再多作也沒啥太大意義。

另外，如果對於單數數搞不清楚，可以使用 ruby script/console 裡面打 pluralize 跟 singularize 來測試一下

>> puts 'cat'.pluralize
cats
>> puts 'people'.singularize
person

Rails 的單複數轉換

1. Inflector.inflections do inflect

2. inflect.plural(/$/, 's')

3. inflect.plural(/s$/i, 's')

4. inflect.plural(/(axtest)is$/i, '\1es')

5. inflect.plural(/(octopvir)us$/i, '\1i')

6. inflect.plural(/(aliasstatus)$/i, '\1es')

7. inflect.plural(/(bu)s$/i, '\1ses')

8. inflect.plural(/(buffaltomat)o$/i, '\1oes')

9. inflect.plural(/([ti])um$/i, '\1a')

10. inflect.plural(/sis$/i, 'ses')

11. inflect.plural(/(?:([^f])fe([lr])f)$/i, '\1\2ves')

12. inflect.plural(/(hive)$/i, '\1s')

13. inflect.plural(/([^aeiouy]qu)y$/i, '\1ies')

14. inflect.plural(/(xchsssh)$/i, '\1es')

15. inflect.plural(/(matrvertind)ixex$/i, '\1ices')

16. inflect.plural(/([ml])ouse$/i, '\1ice')

17. inflect.plural(/^(ox)$/i, '\1en')

18. inflect.plural(/(quiz)$/i, '\1zes')

19.

20. inflect.singular(/s$/i, '')

21. inflect.singular(/(n)ews$/i, '\1ews')

22. inflect.singular(/([ti])a$/i, '\1um')

23. inflect.singular(/((a)naly(b)a(d)iagno(p)arenthe(p)rogno(s)ynop(t)he)ses$/i, '\1\2sis')

24. inflect.singular(/(^analy)ses$/i, '\1sis')

25. inflect.singular(/([^f])ves$/i, '\1fe')

26. inflect.singular(/(hive)s$/i, '\1')

27. inflect.singular(/(tive)s$/i, '\1')

28. inflect.singular(/([lr])ves$/i, '\1f')

29. inflect.singular(/([^aeiouy]qu)ies$/i, '\1y')

30. inflect.singular(/(s)eries$/i, '\1eries')

31. inflect.singular(/(m)ovies$/i, '\1ovie')

32. inflect.singular(/(xchsssh)es$/i, '\1')

33. inflect.singular(/([ml])ice$/i, '\1ouse')

34. inflect.singular(/(bus)es$/i, '\1')

35. inflect.singular(/(o)es$/i, '\1')

36. inflect.singular(/(shoe)s$/i, '\1')

37. inflect.singular(/(crisaxtest)es$/i, '\1is')

38. inflect.singular(/(octopvir)i$/i, '\1us')

39. inflect.singular(/(aliasstatus)es$/i, '\1')

40. inflect.singular(/^(ox)en/i, '\1')

41. inflect.singular(/(vertind)ices$/i, '\1ex')

42. inflect.singular(/(matr)ices$/i, '\1ix')

43. inflect.singular(/(quiz)zes$/i, '\1')

44.

45. inflect.irregular('person', 'people')

46. inflect.irregular('man', 'men')

47. inflect.irregular('child', 'children')

48. inflect.irregular('sex', 'sexes')

49. inflect.irregular('move', 'moves')

50.

51. inflect.uncountable(%w(equipment information rice money species series fish sheep))

52. end