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RubyをRubyらしく書く！

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July 10, 2018
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 RubyをRubyらしく書く！

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t0w4

July 10, 2018

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Transcript

  1. Λ Β͘͠ॻ͘ʂ

  2. ໨࣍ 1.RubyͬͯԿʁ 2.Ruby͸RubyΒ͔͘͘͠ʂ 3.RubyΛॻ͖ͨ͘ͳͬͨ͋ͳͨ΁… 4.͓·͚

  3. ୈ1ষ RubyͬͯԿʁ

  4. ୈ1ষ RubyͬͯԿʁ ·ͭ΋ͱΏ͖ͻΖʢ௨শ MatzʣʹΑΓ։ൃ͞Εͨ ΦϒδΣΫτࢦ޲εΫϦϓτݴޠɻ

  5. ୈ1ষ RubyͬͯԿʁ Ҏ্ ࠓճ͸Rubyͷྑ͞Λײ͡औͬͯ΋Β͏ͷ͕ ໨తͳͷͰݴޠࣗମͷৄ͍͠આ໌͸͋Γ·ͤΜɻ ಄Ͱͳ͘৺Ͱฉ͍͍ͯͩ͘͞ɻ

  6. ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ ͔͜͜Β͸࣮ࡍʹमਖ਼લޙͷιʔεΛ ݟͳ͕Βઆ໌͍͖ͯ͠·͢. ͍ͭͰʹଞͷݴޠͰ͸Ͳ͏͔ฉ͔͍ͤͯͩ͘͞ʂ (ݴޠʹґΒͳ͍಺༰΋͋ΔͷͰ͝஫ҙΛ…)

  7. ˙؆୯ͳJGจ͸ߦͰ JGGSBH0, QVUT0, FOE ίʔυઆ໌ɿ ม਺GSBH͕z0,zͷ৔߹จࣈྻz0,zΛඪ४ग़ྗ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  8. JGGSBH0, QVUT0, FOE ˙؆୯ͳJGจ͸ߦͰ ίʔυઆ໌ɿ ม਺GSBH͕z0,zͷ৔߹จࣈྻz0,zΛඪ४ग़ྗ मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  9. ˙؆୯ͳJGจ͸ߦͰ QVUT0,JGGSBH0, JGจͷத਎͕ߦఔ౓ͷ಺༰Ͱ͋Ε͹ɺޙஔJGͰߦ਺Λ मਖ਼ޙ ݮΒ͠·͠ΐ͏ʂ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  10. ˙JGͷ৚͕݅ࣜ൱ఆͷ࣌͸VOMFTTΛ࢖͏ʂ JGGSBH/( QVUT0, FOE ίʔυઆ໌ɿ ม਺GSBH͕z/(zҎ֎ͷ৔߹ɺจࣈྻz0,zΛඪ४ग़ྗ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  11. ˙JGͷ৚͕݅ࣜ൱ఆͷ࣌͸VOMFTTΛ࢖͏ʂ ίʔυઆ໌ɿ ม਺GSBH͕z/(zҎ֎ͷ৔߹ɺจࣈྻz0,zΛඪ४ग़ྗ JGGSBH/( QVUT0, FOE मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

    10/46

  12. VOMFTTGSBH/( QVUT0, FOE ؆୯ͳ൱ఆͷ৚݅ࣜͰ͋Ε͹VOMFTTΛ࢖༻ͯ͠ मਖ਼ޙ ৚݅ࣜΛߠఆจʹ͠·͠ΐ͏ʂ ˙JGͷ৚͕݅ࣜ൱ఆͷ࣌͸VOMFTTΛ࢖͏ʂ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  13. ˙؆୯ͳJGFMTFจ͸ࡾ߲ԋࢉࢠΛ࢖͑ͳ͍͔ࢼ͢ʂ JGGSBH0, SFTVMU FMTF SFTVMU FOE ίʔυઆ໌ɿ ม਺GSBH͕z0,zͳΒSFTVMUʹɺͦΕҎ֎ͳΒΛ୅ೖ मਖ਼લ ୈ2ষ

    Ruby͸RubyΒ͔͘͘͠ʂ

  14. ˙؆୯ͳJGFMTFจ͸ࡾ߲ԋࢉࢠΛ࢖͑ͳ͍͔ࢼ͢ʂ JGGSBH0, SFTVMU FMTF SFTVMU FOE ίʔυઆ໌ɿ ม਺GSBH͕z0,zͳΒSFTVMUʹɺͦΕҎ֎ͳΒΛ୅ೖ मਖ਼લ ここ！！(全部)

    ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  15. ˙؆୯ͳJGFMTFจ͸ࡾ߲ԋࢉࢠΛ࢖͑ͳ͍͔ࢼ͢ʂ SFTVMU GSBH0,  ؆୯ͳJGFMTFจͰಉ͡ม਺ʹର͠୅ೖͳͲΛߦͳ͍ͬͯΔ मਖ਼ޙ ৔߹͸ੵۃతʹࡾ߲ԋࢉࢠΛ࢖ͬͯݟ·͠ΐ͏ɻ ˞جຊతʹJGจ͕ωετ͢Δ࣌͸࢖͏΂͖Ͱ͸ͳ͍ʂʂ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  16. ˙ΞʔϦʔϦλʔϯ def hogehoge(frag) if frag == "OK" ԿΒ͔ͷॲཧ ԿΒ͔ͷॲཧ return

    true end return false end JGจͷத਎͕ߦఔ౓ͷ಺༰Ͱ͋Ε͹ɺޙஔJGͰߦ਺Λ ݮΒ͠·͠ΐ͏ʂ मਖ਼લ def hogehoge(frag) return false if frag != "OK" ԿΒ͔ͷॲཧ ԿΒ͔ͷॲཧ return "OK!" end मਖ਼ޙ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  17. ˙ϝιουͷ໭Γ஋Λฦ࣌͢͸Ͱ͖Δ͚ͩSFUVSOΛ ࢖Θͳ͍ def hogehoge result = "OK" result += "!"

    return result end ίʔυઆ໌ɿ จࣈྻΛՃ޻͠z0,zΛฦ͢ϝιουΛఆٛ͢Δɻ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  18. ˙ϝιουͷ໭Γ஋Λฦ࣌͢͸Ͱ͖Δ͚ͩSFUVSOΛ ࢖Θͳ͍ def hogehoge result = "OK" result += "!"

    return result end ίʔυઆ໌ɿ จࣈྻΛՃ޻͠z0,zΛฦ͢ϝιουΛఆٛ͢Δɻ मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  19. ˙ϝιουͷ໭Γ஋Λฦ࣌͢͸Ͱ͖Δ͚ͩSFUVSOΛ ࢖Θͳ͍ 3VCZ͸ϝιουఆٛͷ࠷ޙͷΦϒδΣΫτΛฦ͢ͷͰ ࠷ޙ͕SFUVSOจͷ৔߹͸ͦͷSFUVSOΛഉআͰ͖Δɻ def hogehoge result = "OK" result

    += "!" result end मਖ਼ޙ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  20. ˙ϝιουͷ໭Γ஋Λฦ࣌͢͸Ͱ͖Δ͚ͩSFUVSOΛ ࢖Θͳ͍ ࣮͸࠷ޙͷSFTVMU΋ͳͯ͘େৎ෉Ͱ͢ def hogehoge result = "OK" result +=

    "!" result end मਖ਼ޙ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  21. ˙GPSΛ࢖͏ͳFBDIΛ࢖͑ʂ GPSOBNFJO<#0# +0/ "-*$&>EP QVUTOBNF FOE ίʔυઆ໌ɿ ഑ྻͷ֤ཁૉΛඪ४ग़ྗ͢ΔɻKBWBͷ֦ுGPSจΆ͍ʁ मਖ਼લ ୈ2ষ

    Ruby͸RubyΒ͔͘͘͠ʂ 20/46

  22. ˙GPSΛ࢖͏ͳFBDIΛ࢖͑ʂ GPSOBNFJO<#0# +0/ "-*$&>EP QVUTOBNF FOE ίʔυઆ໌ɿ ഑ྻͷ֤ཁૉΛඪ४ग़ྗ͢ΔɻKBWBͷ֦ுGPSจΆ͍ʁ मਖ਼લ ここ！！！

    ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  23. <#0# +0/ "-*$&>FBDIEPcOBNFc QVUTOBNF FOE ผͷݴޠ͔Βདྷͨਓͩͱ࢖͍͕ͪͰ͕͢ɺجຊతʹ 3VCZͰ͸GPS͸΄΅΄΅࢖͍·ͤΜʂݟͨ͜ͱͳ͍Ͱ͢ɻ मਖ਼ޙ ˙GPSΛ࢖͏ͳFBDIΛ࢖͑ʂ 3VCZͰ͸഑ྻʹ഑ྻʹΞΫηε͢ΔΠςϨʔλ͕ͨ͘͞Μ

    ͋ΔͷͰ༻్ʹ߹Θͤͯ࢖͍෼͚·͠ΐ͏ʂ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  24. X #0#+0/"-*$& FBDIEPcOBNFc QVUTOBNF FOE จࣈྻ഑ྻ͸XΛ࢖͏ํ͕3VCZΒ͍͠Ͱ͢ɻ ΋zz΋ඞཁͳ͍ͷͰλΠϙ͠ʹ͍͘Ͱ͢ɻ मਖ਼ޙ ˙GPSΛ࢖͏ͳFBDIΛ࢖͑ʂ ୈ2ষ

    Ruby͸RubyΒ͔͘͘͠ʂ

  25. ˙จࣈྻͷ੔ܗ EFGBJTBUV OBNF  QVUT.ZOBNFJT OBNF  FOE ίʔυઆ໌ɿ Ҿ਺ͷ஋Λݩʹʮ.ZOBNFJTʙʙʯܗࣜͷ

    ඪ४ग़ྗΛߦ͏ɻ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  26. ˙จࣈྻͷ੔ܗ EFGBJTBUV OBNF  QVUT.ZOBNFJT OBNF  FOE ίʔυઆ໌ɿ Ҿ਺ͷ஋Λݩʹʮ.ZOBNFJTʙʙʯܗࣜͷ

    ඪ४ग़ྗΛߦ͏ɻ मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  27. EFGBJTBUV OBNF  QVUT.ZOBNFJT\OBNF^ FOE จࣈྻͷ݁߹ͳͲ͸Ͱ͖Δ͚ͩʮ ʯͳͲΛ࢖Θͣ \ɾɾɾ^ܗࣜͷม਺ల։Λ࢖͍·͠ΐ͏ʂ मਖ਼ޙ ""ͷด͡๨Εɺʮ+ʯͷ͚ͭ๨Ε͕ݮΔ͏͑ݟ΍͍͢ʂʂ

    ˙จࣈྻͷ੔ܗ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  28. ˙จࣈྻͷ੔ܗ ෳ਺ߦ EFGNBJM@DPOUFOUT OBNF  DPOUFOUT)FMMPaO DPOUFOUT .ZOBNFJT\OBNF^ FOE ίʔυઆ໌ɿ

    Ҿ਺ͷ஋Λݩʹʮ)FMMP.ZOBNFJTʙʙʯͷจࣈྻΛ վߦࠐΈͰฦ͢ɻ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  29. ˙จࣈྻͷ੔ܗ ෳ਺ߦ EFGNBJM@DPOUFOUT OBNF  DPOUFOUT)FMMPaO DPOUFOUT .ZOBNFJT\OBNF^ FOE ίʔυઆ໌ɿ

    Ҿ਺ͷ஋Λݩʹʮ)FMMP.ZOBNFJTʙʙʯͷจࣈྻΛ վߦࠐΈͰฦ͢ɻ मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  30. EFGNBJM@DPOUFOUT OBNF  d&04 )FMMP .ZOBNFJT\OBNF^ &04 FOE ෳ਺ߦͷ؆୯ͳจࣈྻ੔ܗ͸ώΞυΩϡϝϯτΛ࢖ͬͨํ͕ ݟ΍ͯ͘͢मਖ਼͠΍͍͢Ͱ͢ʂ

    मਖ਼ޙ ※~EOSͱॻ͘ͱʮHello!ʯͷલͷεϖʔεΛແࢹͯ͘͠ΕΔ ˙จࣈྻͷ੔ܗ ෳ਺ߦ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ 30/46

  31. ˙ೖྗ஋͕OJM 3VCZͷ/6-- ͷ͚࣌ͩॳظԽ EFGIPHF BSH  BSH)PHFOFXJGBSHOJM  BSH FOE

    ίʔυઆ໌ɿ Ҿ਺͕OJMͳΒ)PHFΫϥεͷΠϯελϯεΛฦ͢ɻ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  32. ˙ೖྗ஋͕OJM 3VCZͷ/6-- ͷ͚࣌ͩॳظԽ EFGIPHF BSH  BSH)PHFOFXJGBSHOJM  BSH FOE

    ίʔυઆ໌ɿ Ҿ਺͕OJMͳΒ)PHFΫϥεͷΠϯελϯεΛฦ͢ɻ मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  33. EFGIPHF BSH  BSHcc)PHFOFX FOE ҙຯ͸ʮBSHBSHcc)PHFOFXʯͱಉ͡Ͱɺ मਖ਼ޙ ˙ೖྗ஋͕OJM 3VCZͷ/6-- ͷ͚࣌ͩॳظԽ

    BSH͕OJM GBMTF΋ ͳΒ)PHFͷΠϯελϯεΛฦ͢ɻ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  34. ˙ม਺ͷॳظԽɺฤूɺ໭Γ஋ͷηοτΛεϚʔτʹʂ EFGBMM@GJMFT GJMFT<> %JSHMPC  UYU EPcGJMFc GJMFTGJMF FOE GJMFT

    FOE ίʔυઆ໌ɿ ΧϨϯτσΟϨΫτϦʹ͋Δ֦ுࢠ͕ʮUYUʯͷϑΝΠϧ ҰཡΛ഑ྻͰฦ͢ɻ मਖ਼લ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  35. ˙ม਺ͷॳظԽɺฤूɺ໭Γ஋ͷηοτΛεϚʔτʹʂ EFGBMM@GJMFT GJMFT<> %JSHMPC  UYU EPcGJMFc GJMFTGJMF FOE GJMFT

    FOE ίʔυઆ໌ɿ ΧϨϯτσΟϨΫτϦʹ͋Δ֦ுࢠ͕ʮUYUʯͷϑΝΠϧ ҰཡΛ഑ྻͰฦ͢ɻ मਖ਼લ ここ！！！ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  36. EFGBMM@GJMFT <>UBQEPcGJMFTc %JSHMPC   EPcGJMFc GJMFTGJMF FOE FOE FOE

    ߦ਺͸मਖ਼લͱมΘΓ·ͤΜ͕ɺमਖ਼ޙ͸ॳظԽɺ मਖ਼ޙ ໭Γ஋ͷηοτΛলུͰ͖ɺͪ͜Βͷํ͕3VCZΒ͍͠ɻ ˙ม਺ͷॳظԽɺฤूɺ໭Γ஋ͷηοτΛεϚʔτʹʂ ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ

  37. ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ ࠓ೔͓ݟͤͨ͠ه๏Ҏ֎ʹ΋3VCZΒ͍͠ॻ͖ํ΍ ศརͳϝιου͕ͨͪ͋Γ·͢ɻ ڵຯ͕͋Δਓ͸ͥͻࢼͯ͠Έ͍ͯͩ͘͞ʂ

  38. ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ ͨͩࣗ༝ʹॻ͚Δจɺෳ਺ਓͰ։ൃΛ͍ͯ͠Δͱ Ͳ͏ͯ͠΋ίʔσΟϯάϧʔϧ΍ॻ͖ํͷΫηͳͲ ͷ౷Ұ͕೉͍͠Ͱ͢ΑͶɺɺ ࠓճ͸͋Θ্ͤͯهͷ໰୊ʹ༗ޮͳHFN 3VCZͷ ϥΠϒϥϦ Λ঺հ͠·͢ʂ

  39. ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ SVCPDPQίϚϯυΛ࣮ߦ͢Δ͜ͱʹΑΓɺن໿ʹ४ڌ͍ͯ͠Δ͔ɺ ΑΓྑ͍ه๏͔νΣοΫͯ͘͠ΕΔɻBΦϓγϣϯΛ෇͚Ε͹͋Δ ఔ౓͸ࣗಈͰमਖ਼ͯ͘͠ΕΔɻ جຊతʹ͸SVCZTUZMFHVJEFʹ४ڌ͍ͯ͠·͕͢ɺ SVCPDPQZNMΛमਖ਼͢Δ͜ͱͰ४ڌͷ༗ແΛௐ੔Ͱ͖·͢ʂ

  40. ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ ͪ͜Β͸SBJMT@CFTU@QSBDUJDFTίϚϯυΛ࣮ߦ͢Δ͜ͱʹΑΓɺ 3BJMTͷϕετϓϥΫςΟεతͳه๏Λ͍ͯ͠Δ͔νΣοΫͯ͠ ͘Ε·͢ɻ SVCPDPQͱಉ͘͡ZNMΛमਖ਼͢Δ͜ͱͰ४ڌͷ༗ແΛௐ੔Ͱ͖ ·͢ʂ rails_best_practices

  41. ୈ2ষ Ruby͸RubyΒ͔͘͘͠ʂ ͜Ε͸ίʔσΟϯάن໿ͱ͸ҧ͍·͕͢ɺCSBLFNBOίϚϯυΛ࣮ ߦ͢Δ͜ͱʹΑΓɺ3BJMTͷηΩϡϦςΟνΣοΫͱͯ͘͠Ε·͢ɻ ݁Ռ͸)5.-Ͱ΋औಘՄೳɻ ΋ͪΖΜ։ൃऀͷ஌ࣝ΍νΣοΫ΋ඞཁͰ͕͋͢Δఔ౓ͷϨϕϧ ·Ͱ͸ࣗಈͰ֬ೝ͢Δͷ͕୭ʹͱͬͯ΋͍͍ͱࢥ͍·͢ɻɻɻ 40/46

  42. ୈ3ষ RubyΛॻ͖ͨ͘ͳͬͨ͋ͳͨ΁… ͜͜·ͰདྷͨΒ΋͏Rubyɺɺ ॻ͖ͨ͘ͳͬͯདྷͨΜ͡Όͳ͍Ͱ͔͢ʁ Θ͔Γ·͢ɻ ͱ͍͏Θ͚ͰΦεεϝͷॻ੶Λ঺հ͠·͢ɻ

  43. ύʔϑΣΫτ 3VCZʲվఆ൛ʳ 3VCZαϙʔλʔζ ஶ ؀ڥߏங͸΋ͪΖΜͷ͜ͱɺ 3VCZͷجૅΛ໢ཏͨ͠ॳ৺ऀʹ ͋Γ͕͍ͨҰ࡭ɻHFNͷ࡞Γํ͕ ͳʹ͛ʹ͋Γ͕͍ͨɻ ԁ ੫ࠐ

    w w w w w ݹ͍ํΛങΘͳ͍ Α͏ʹ஫ҙɹɹˠ

  44. ϝλϓϩάϥϛϯά 3VCZ 1BPMP1FSSPUUB ஶ 3VCZͷࣗ༝ͳ෦෼ ҋΛؚΉ  ͕આ໌͞Ε͍ͯΔྑॻɻ ໘നͯ͘Θ͔Γ΍͍͢ͷͰ ΦεεϝͰ͢ɻࠇຐज़ॻ

    ԁ ੫ࠐ w w w w w

  45. ϓϩάϥϛϯάݴޠ 3VCZ ύʔϑΣΫτ3VCZ͡Ό಺༰͕গ͠ ෺଍Γͳ͍ͳͬͯਓʹΦεεϝͷຊɻ 3VCZ։ൃऀࣗΒ͕ॻ͍͍ͯͯΑΓ ৄ͍͠ݴޠͷ஌͕ࣝಘΒΕ·͢ɻ ԁ ੫ࠐ w w

    w w w

  46. ύʔϑΣΫτ 3VCZPO3BJMT ؀ڥߏங͸΋ͪΖΜͷ͜ͱɺ 3BJMTͷجૅΛ໢ཏͨ͠ॳ৺ऀʹ ͋Γ͕͍ͨҰ࡭ɻ ύʔϑΣΫτγϦʔζ͸ϋζϨ͕ͳ͍ ؾ͕͠·͢Ͷɺɺɺ ԁ ੫ࠐ w

    w w w w

  47. ݸਓతʹ͸3BJMT͔Βೖͬͯศར͞Λֶͼɺ ͔ͦ͜Β3VCZΛਂΊ͍ͯͬͨํָ͕͘͠ ษڧͰ͖Δ͔ͳʔͱࢥ͍·͢ɻ ϝλϓϩάϥϛϯά3VCZ͸ઈରಡΉ΂͖ɻ શ෦ങͬͯ΋ԁҎ಺Ͱ͢ɺ͍҆ʂ

  48. ˙ΦʔϓϯΫϥε [1] pry(main)> [2] pry(main)> class String [2] pry(main)* def

    upcase [2] pry(main)* self.downcase [2] pry(main)* end [2] pry(main)* end => :upcase [3] pry(main)> "abCD".upcase => "abcd" [4] pry(main)> 3VCZ͸ఆٛࡁΈͷΫϥεʹର͠ఆٛͷมߋɺϝιουͷ ௥Ճɺ্ॻ͖ΛͲͷΫϥεʹରͯ͠΋ߦ͑·͢ɻ ্ͷྫ͸จࣈྻΛେจࣈԽ͢ΔϝιουΛʮখจࣈԽʯ͢ Δϝιουʹॻ͖׵͍͑ͯ·͢ɻ΍͹͍ मਖ਼લ ͓·͚ɿRubyͷҋ෦෼

  49. ˙ϝιουͷಈత௥Ճ [1] pry(main)> define_method :my_method do |arg| [1] pry(main)* "#{arg}

    is method" [1] pry(main)* end => :my_method [2] pry(main)> my_method("hoge") => "hoge is method" [3] pry(main)> 3VCZʹ͸ϝιουΛ௥Ճ͢ΔͨΊͷϝιου͕͋Γɺ໊ শɾಈ࡞ͳͲΛม਺Λ࢖༻ͯ͠ಈతʹఆٛͰ͖·͢ɻ ্ͷྫ͸Ҿ਺Λड͚औΓɺzҾ਺JTNFUIPEzͱ͍͏จࣈྻ Λฦ͢ϝιουΛఆ͍ٛͯ͠·͢ɻ ͓·͚ɿRubyͷҋ෦෼

  50. ˙Ξϥ΢ϯυΤΠϦΞε [1] pry(main)> class String [1] pry(main)* alias :orig_upcase :upcase

    [1] pry(main)* def upcase [1] pry(main)* self.orig_upcase + " is upcased!" [1] pry(main)* end [1] pry(main)* end => :upcase [2] pry(main)> "hoge".upcase => "HOGE is upcased!" [3] pry(main)> Ξϥ΢ϯυΤΠϦΞεͱ͸ɺݩͷϝιου໊Λม͑ͣʹ ϝιουͷಈ͖Λ௥Ճ͠·͢ɻ ্ͷྫ͸จࣈྻΛେจࣈʹ͢ΔϝιουΛमਖ਼ͯ͠ɺ຤ ඌʹzJTVQDBTFEz͕௥Ճ͞ΕΔΑ͏ʹ͍ͯ͠·͢ɻ ͓·͚ɿRubyͷҋ෦෼

  51. Ҏ্ɺ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ҋͷ෦෼ͷଓ͖͸ ϝλϓϩάϥϛϯά3VCZͰͲ͏ͧ