#eachを使ったら負け

Transcript

1. #eachΛ࢖ͬͨΒෛ͚

2. GPSΛ࢖͍·͠ΐ͏

3. ʜ͡Όͳͯ͘

4. FBDI
   Λ࢖͏ͱ͍͏͜ͱ͸

5. &OVNFSBCMFΛ࢖͍ͬͯͳ͍ͬͯ͜ͱ

6. &OVNFSBCMFΛ΋ͬͱ࢖͍·͠ΐ͏

7. Enumerable.instance_methods.sort => [:all?, :any?, :chunk, :collect, :collect_concat, :count, :cycle, :detect,

   :drop, :drop_while, :each_cons, :each_entry, :each_slice, :each_with_index, :each_with_object, :entries, :find, :find_all, :find_index, :first, :flat_map, :grep, :group_by, :include?, :inject, :map, :max, :max_by, :member?, :min, :min_by, :minmax, :minmax_by, :none?, :one?, :partition, :reduce, :reject, :reverse_each, :select, :slice_before, :sort, :sort_by, :take, :take_while, :to_a, :zip]

8. FBDIࢦ਺

9. IUUQTHJTUHJUIVCDPN

10. 6TBHF

11. None

12. RVJDL
    EFNP

13. ஫ҙɿશવݡ͘ͳ͍ूܭํ๏

14. ack --no-group --ruby "<method>[\s\.\{\(=]" <dir>

15. &OVNFSBCMFͷϝιου໊ͱ ඃͬͨΒ਺͑ͯ͠·͏

16. ΋ͬͱ&OVNFSBCMFʹ͍ͭͯ஌Γ͍ͨਓ΁

17. IUUQSVCZEPDPSHDPSF&OVNFSBCMFIUNM

18. $3VCZ
    enum.c

19. 3VCJOJVT
    kernel/common/enumerable*.rb

20. ͓·͚ɿ ͓͢͢Ίͷ&OVNFSBCMFϝιου

21. #each_with_object # Better than inject for building hashes %w(one two

    three).each_with_object({}) {|w, hash| hash[word] = word.length } # => {"one"=>3, "two"=>3, "three"=>5}