Ruby講義第8回

3VCZߨٛ ୈճ3VCZೖ໳ ,VOJBLJ*("3"4)*JHBJHB BUҰڮେֶ ࣾձՊֶʹ͓͚Δ৘ใٕज़ͱίϯςϯπ࡞੒ᶙ χϑςΟגࣜձࣾدෟߨٛ

χϑςΟגࣜձࣾ ఏڙ

ߨࢣ ޒेཛྷ๜໌ גࣜձࣾສ༿ɹΤϯδχΞ

5FBDIJOH"TTJTUBOU ᖛ࡚݈ޗ ΫοΫύουגࣜձࣾɹΤϯδχΞ

ઌिͷ ͓͞Β͍

ϒϩοΫ BSSBZTPSU@CZEPcJc J FOE EPʙFOEͰॻ͔ΕΔॲཧͷ͔ͨ·Γ ౧৭ͷ෦෼͕ϒϩοΫ Ҏલग़͖ͯͨFBDIϝιουʹ͍ͭͯͨͷ΋࣮͸ϒϩοΫͰ͢ɻ BSSBZFBDIEPcJc QVUTJ FOE

ϝιουʴϒϩοΫ BSSBZTPSU@CZEPcJc J FOE "SSBZTPSU@CZ΍"SSBZFBDI͸ ϒϩοΫΛఴ͑ͯݺͼग़͠·͢ɻ ϒϩοΫΛఴ͑ͯݺͼग़͢"SSBZͷϝιου͸ େ఍"SSBZͷશཁૉʹ͍ͭͯ܁Γฦ࣮͠ߦ͠·͢ɻ BSSBZFBDIEPcJc QVUTJ
FOE TPSU@CZશཁૉΛϒϩοΫͷධՁ݁ՌͰฒͼସ͑ FBDIશཁૉʹ͍ͭͯϒϩοΫΛ࣮ߦ

ϒϩοΫͷධՁ݁Ռ BSSBZTPSU@CZEPcJc J FOE TPSU@CZ͸ʮ"SSBZΛϒϩοΫͷධՁ݁ՌͰฒ ͼସ͑ʯ͢ΔϝιουͰ͢ɻϒϩοΫͷධՁ݁Ռ ͸ϒϩοΫͰ࠷ޙʹ࣮ߦ͞ΕͨจʹͳΓ·͢ɻ ˡϒϩοΫͰ࠷ޙʹ࣮ߦ͞Εͨจ͕ ϒϩοΫͷධՁ݁Ռ

"SSBZTPSU@CZϝιου BSSBZ< > SFTVMUBSSBZTPSU@CZEPcJc J FOE QSFTVMU "SSBZͷத਎ΛϒϩοΫͷධՁ݁ՌͰฒͼସ͑ <
> αϯϓϧίʔυ ճ໨JධՁ݁Ռ ճ໨JධՁ݁Ռ ճ໨JධՁ݁Ռ ࣮ߦ݁Ռ

ϦϑΝϨϯεϚχϡΞϧݕࡧ ը໘ࠨ্ͷݕࡧ૭ʹ ʮ"SSBZʯͱೖྗ͠·͢ɻ දࣔީิͷ࠷ॳͷߦ ʮ"SSBZʯΛΫϦοΫ͠·͢ɻ ӈଆʹ"SSBZͷϝιουҰཡͳͲͷઆ໌͕දࣔ͞Ε·͢ɻ Լͷํ΁୳͍ͯ͘͠ͱɾɾɾ

ϦϑΝϨϯεϚχϡΞϧݕࡧ ϝιου໊ͱɺͦͷϝιουͷઆ໌͕ฒΜͰ·͢ɻ ࢖͑ͦ͏ͳϝιουͷ͋ͨΓΛ͚ͭͨΒϝιου໊ΛΫϦοΫ ϝιου໊ આ໌ αϯϓϧίʔυ SFWFSTFΛ࢖͑͹Ͱ͖ͦ͏Ͱ͢ɻ

ϦϑΝϨϯεϚχϡΞϧݕࡧ ෼͔Γқ͍ύλʔϯͰJSCͰࢼͯ͠ΈΔ < >SFWFSTF < > SFWFSTFΛ࢖͑͹Ͱ͖ͦ͏Ͱ͢ɻ JSC

ࠓि ͔͜͜Β

ԋशಛू 8JLJQFEJBΞΫηεղੳ ԋश࣌ؒ ԋश࣌ؒ ԋशͷղ౴ͱղઆ ໨࣍

8JLJQFEJB ΞΫηε਺ղੳ ෮श

8JLJQFEJBͷΞΫηε਺ղੳ XJLJQFEJB͸࣌ؒ͝ͱͷΞΫηε਺σʔλΛެ։ ͍ͯ͠·͢ɻ IUUQEVNQTXJLJNFEJBPSHPUIFSQBHFDPVOUTSBX

8JLJQFEJBΞΫηε਺σʔλ KBC$ KBC$$#$"'$#'$#%$"$"$$"$$"' $#%$#$"$"'$#'$#%$"'$#'$#% $"'$#%$"$$"'$#%$"$$"$"%$"' $#'$#%$"'$#%$" KBC&&#&&&#&&""&% "&#&&"#&'&"&$"$@ &$#&@&#& KBC&"&"&"%&"
&&"&"&"&&##&% &#@&%&#$&#'&"#&## &&"%&#&"&"' &&"& KBC&"&"&"%&" &&"&"&"&&##&% &#@&"&&#" &"&"&"%&" &&"&"&"&"'&'#$' ͍ͬͯ͏σʔλ͕਺ेສߦ

8JLJQFEJBΞΫηε਺σʔλ σʔλߏ଄ΛݟΔͨΊʹͪΐͬͱಡΈ΍͘͢ม͑ͨ΋ͷ KBCΞʔςΟΩϡϨʔγϣϯΛද͢ه߸ KBCΧςΰϦελϒ KBCΧςΰϦେֶೖࢼ KBCΧςΰϦຽ๏ KBCΧςΰϦࣾձֶ KBCΧςΰϦ6TFS@CH KBCΧςΰϦ6TFS@VL KBCΨεࣄۀ๏ୈ৚
KBCΨϦΞઓه KBCΨϦΞઓهࢀরը૾Ұཡ KBCίϯτϥΫτϒϦοδϧʔϧ KBCίϯτϥΫτϒϦοδϧʔϧείΞϦϯά ͍ͬͯ͏σʔλ͕਺ेສߦ

8JLJQFEJBΞΫηε਺σʔλ ݴޠछผɹϖʔδλΠτϧɹΞΫηε਺ɹ༰ྔ KBC$ KBC$$#$"'$#'$#%$"$"$$"$ $"'$#%$#$"$"'$#'$#%$"'$#' $#%$"'$#%$"$$"'$#% $"$$"$"%$"'$#'$#%$"'$#% $" KBC&&#&&&#&&""&% "&#&&"#&'&"&$
"$@&$#&@&#& ͜ͷσʔλΛղੳͯ͠ɺ͋Δ࣌ؒͷΞΫηε਺το ϓΛίʔυΛॻ͍ͯௐ΂ͯΈ·͢ɻ ؆୯ʹݴ͏ͱɺʮΞΫηε਺ʯཝͷ਺͕େ͖͍΋ͷ͔ ΒݸɺͦͷʮϖʔδλΠτϧʯΛදࣔͤ͞Δ

8JLJQFEJBͷΞΫηε਺ղੳ ίʔυͰॻ͘ࡍͷॲཧͷྲྀΕ σʔλϑΝΠϧΛ։͘ σʔλϑΝΠϧ͔ΒߦಡΈࠐΉ ೔ຊޠσʔλҎ֎͸ύε σʔλߦ͔ΒλΠτϧͱΧ΢ϯτΛऔಘ औಘσʔλΛ͍Ε΋ͷʹ٧Ίͯͱ͓ͬͯ͘ σʔλϑΝΠϧશߦʹ͍ͭͯ܁Γฦ͠ σʔλϑΝΠϧΛด͡Δ ஷ·ͬͨσʔλΛΧ΢ϯτॱʹιʔτʢฒ΂ସ͑ʣ
τοϓ݅දࣔ

8JLJQFEJBͷΞΫηε਺ղੳ FODPEJOHVUG SFRVJSFDHJ pMFOBNFQBHFDPVOUTKBUYU pMF'JMFPQFO pMFOBNF S65' MJTU<> XIJMFUFYUpMFHFUT CFHJO
OFYUVOMFTTUFYUd?KB EBUBUFYUTQMJU I\UJUMF$(*VOFTDBQF EBUB<> DPVOUEBUB<>^ MJTUQVTII SFTDVF&YDFQUJPOF QF FOE FOE pMFDMPTF DPVOUॱʹιʔτ SFTVMUMJTUTPSU@CZEPcJc J<DPVOU>UP@J FOE τοϓදࣔ SFTVMUSFWFSTFpSTU FBDIEPcJc QVUTJ FOE

લճɺΤϥʔϝοηʔδ͕ͨ͘͞Μग़ͨཧ༝ "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65'
"SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' ͜Μͳͷग़ͯ·ͨ͠ɻ

ௐ΂ͨͱ͜ΖɺҎԼͷΑ͏ʹͳͬͯ·ͨ͠ XIJMFUFYUpMFHFUT CFHJO OFYUVOMFTTUFYUd?KB EBUBUFYUTQMJU I\UJUMF$(*VOFTDBQF EBUB<> DPVOUEBUB<>^ MJTUQVTII SFTDVF&YDFQUJPOF
QF FOE FOE จࣈίʔυม׵ʹΪϒΞοϓ͢Δσʔλ͸ɺҎԼͷྫ֎͕ൃੜ "SHVNFOU&SSPSJOWBMJECZUFTFRVFODFJO65' ྫ֎͕ൃੜͨ͠৔߹ɺ͜ͷॲཧ͕ߦΘΕΔɻ ั·͑ͨྫ֎͕ม਺FʹೖΓɺͦΕΛද͍ࣔͯ͠Δɻ ௐࠪͷ݁ՌɺͲ͏΍Β8JLJQFEJBαΠτͰެ։͞Ε͍ͯΔΞΫηε਺σʔλʹ͸ɺͱ ͖Ͳ͖จࣈίʔυม׵ʹΪϒΞοϓ͢Δσʔλͷߦ͕͋ΔΑ͏Ͱ͢ɻ ͜͜Ͱ͸ɺQFͷߦΛQFͱίϝϯτΞ΢τ͢Δ͜ͱʹ͠·͢ɻ ʢม׵Ͱ͖ͳ͍σʔλͷߦ͸ແࢹ͢Δ͜ͱʹͳΓ·͢ɻʣ ˞ਖ਼֬ʹղੳ͍ͨ͠৔߹͸΋͏গ͕͠Μ͹Δํ๏΋͋Γ·͕͢ɺࠓճ͸਺ेສߦͷ͏ ͪͷ਺ߦͳͷͰແࢹͰ͖Δͱߟ͑·͢ɻ ˞ͦΕ͸ͦΕͱͯ͠ɺ഑ͬͨσʔλϑΝΠϧ΋Ұ෦໰୊͕͋ͬͨͷͰ࠶഑෍͠·͢ɻ

8JLJQFEJBͷΞΫηε਺ղੳ FODPEJOHVUG SFRVJSFDHJ pMFOBNFQBHFDPVOUTKBUYU pMF'JMFPQFO pMFOBNF S65' MJTU<> XIJMFUFYUpMFHFUT CFHJO
OFYUVOMFTTUFYUd?KB EBUBUFYUTQMJU I\UJUMF$(*VOFTDBQF EBUB<> DPVOUEBUB<>^ MJTUQVTII SFTDVF&YDFQUJPOF QF FOE FOE pMFDMPTF DPVOUॱʹιʔτ SFTVMUMJTUTPSU@CZEPcJc J<DPVOU>UP@J FOE τοϓදࣔ SFTVMUSFWFSTFpSTU FBDIEPcJc QVUTJ FOE

8JLJQFEJBͷΞΫηε਺ղੳԋश લड़ͷίʔυΛ࣮ߦ͍ͯͩ͘͠͞ɻSCϑΝΠϧͱಉ͡ϑΥϧμʹ QBHFDPVOUTKBUYUΛஔ͍࣮ͯߦ͍ͯͩ͘͠͞ɻ IUUQCJUMZXQEBUB͔Βμ΢ϯϩʔυͰ͖·͢ɻ[JQѹॖͯ͋͠ Γ·͢ɻϒϥ΢βͰμ΢ϯϩʔυͯ͠ղౚ͢Δ͔ɺ-JOVYͷਓ͸Լهͷ˞ͷ ํ๏Ͱ΋͔·͍·ͤΜɻ ʢ࣮ߦ͕࣌ؒ௕͍ͷͰɺ࣮ࡍͷσʔλϑΝΠϧ͔Β೔ຊޠ෦෼͚ͩൈ͖ग़ͯ͠ খͯ͋͘͞͠Γ·͢ɻʣ چɿI\UJUMF$(*VOFTDBQF EBUB<>
DPVOUEBUB<>^ ৽ɿI\UJUMF$(*VOFTDBQF EBUB<> FODPEF DQ DPVOUEBUB<>^ ˞8JOͰग़ྗ͕aV'%%aVaV&aV&ͱͳΔਓ͸ߦ໨෇ۙΛҎ ԼͷίʔυͰࠩ͠ସ͍͑ͯͩ͘͞ɻDQ͸จࣈίʔυͰɺTIJGU@KJTͷXJO൛Ͱ͢ɻ ˞-JOVYͰͷμ΢ϯϩʔυํ๏ͷྫ ୺຤Λ։͍ͯιʔείʔυ͕͋ΔϑΥϧμͰҎԼΛ࣮ߦɻXHFU͸TIFMMͰ࢖͑Δμ΢ϯ ϩʔμʔͰ͢ɻVO[JQ͸[JQղౚίϚϯυͰ͢ɻ XHFUIUUQCJUMZXQEBUB VO[JQXQEBUB

8JLJQFEJBͷΞΫηε਺ղੳԋश ʲ্ڃʳσʔλΛ഑෍͍ͯ͠ΔαΠτ͔Β೚ҙͷ σʔλΛμ΢ϯϩʔυͯ͠ղੳ͍ͯͩ͘͠͞ɻ IUUQEVNQTXJLJNFEJBPSHPUIFSQBHFDPVOUTSBX ώϯτɿH[ܗࣜͰѹॖͯ͋͠ΔͷͰɺղౚ͕ඞཁͰ͢ɻ 7. .BDͷ৔߹͸୺຤͔ΒHVO[JQϑΝΠϧ໊ͰղౚͰ͖·͢ɻ 8JOEPXTͷ৔߹͸ྫ͑͹-IBQMVTΛ࢖ͬͯղౚͰ͖·͢ɻ IUUQXXXGPSFTUJNQSFTTDPKQMJCBSDBSDIJWFBSDIJWFSMIBQMVTIUNM ·ͨɺίʔυ಺ߦ໨͘Β͍ͷpMFOBNFΛղౚͨ͠ϑΝΠϧ໊ʹ͢Δඞཁ͕͋Γ·͢ɻ

ԋशͷલʹ ͚ͭͩ 3VCZͷઆ໌

ഁյతϝιουͷઆ໌ VQDBTFͱVQDBTF 4USJOHVQDBTFͱ4USJOHVQDBTF͸ ͲͪΒ΋จࣈྻΛେจࣈʹ͢ΔϝιουͰ͢ɻ JSCͰ࣮ߦ͢ΔͱͲͪΒ΋ಉ͡Α͏ʹݟ͑·͕͢ɺ ͷ༗ແͰԿ͕ҧ͏ͷͰ͠ΐ͏ʁ BCDVQDBTF"#$ BCDVQDBTF"#$

BCD ࣮ߦલ ΦϒδΣΫτ "#$ BCDVQDBTF BCDVQDBTF ࣮ߦޙ ΦϒδΣΫτ VQDBTF ΦϒδΣΫτ
͕ม਎͢Δ BCD ࣮ߦલ ΦϒδΣΫτ "#$ ࣮ߦޙ ৽ΦϒδΣΫτ VQDBTF BCD چΦϒδΣΫτ ม׵ͨ͠ ৽͍͠ ΦϒδΣΫτ ͕ෳ੡͞ΕΔ

BCD ࣮ߦલ ΦϒδΣΫτ "#$ BCDVQDBTF ࣮ߦޙ ΦϒδΣΫτ VQDBTF ΦϒδΣΫτ ͕ม਎͢Δ
VQDBTFΛ࢖͏ίʔυ BBCD BVQDBTF QVUTB BCD B "#$ B

VQDBTFΛ࢖͏ίʔυ BBCD CBVQDBTF QVUTC BCD "#$ C BCDVQDBTF BCD ࣮ߦલ
ΦϒδΣΫτ "#$ ࣮ߦޙ VQDBTF ม׵ͨ͠ ৽͍͠ ΦϒδΣΫτ ͕ෳ੡͞ΕΔ BCD چΦϒδΣΫτ B BCD B ৽ΦϒδΣΫτ ෳ੡͞ΕͨΦϒδΣΫτΛ ผͷม਺ʹೖΕΔ

BCD ࣮ߦલ ΦϒδΣΫτ "#$ BCDVQDBTF ࣮ߦޙ ΦϒδΣΫτ VQDBTF ΦϒδΣΫτ ͕ม਎͢Δ
ഁյతϝιου VQDBTFͷΑ͏ʹΦϒδΣΫτͷ಺༰Λ มߋ͢Δ΋ͷΛʮഁյతϝιουʯͱݴ͍·͢ ϝιου໊຤ඌʹ͕͍ͭͨΒഁյతϝιου ʢͨͩ͠ɺഁյతϝιουͰ΋͕෇͔ͳ͍΋ͷ΋͋Δʣ

ԋश໰୊ू ͲΕ͔Βղ͍ͯ΋0,Ͱ͢ɻ

ԋश໰୊ "SSBZΦϒδΣΫτͷཁૉ͕ح਺ͷ߲໨Λશͯ଍͢ ίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑͹BSSBZ< >ͷ৔߹ɺ
͕දࣔ͞ΕΕ͹0,Ͱ͢ɻ ώϯτɿح਺͔Ͳ͏͔ௐ΂Δͷ͸'JYOVNPEE ϝιου PEE ˠUSVF PEE ˠGBMTF ͪͳΈʹۮ਺͔ௐ΂Δͷ͸'JYOVNFWFO ϝιουͰ͢ɻ

ԋश໰୊ <\UJUMFB QSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF^> ͱ͍͏ΦϒδΣΫτ͔ΒɺҎԼͷΑ͏ͳΦϒδΣΫτΛ࡞Δ ίʔυΛॻ͍͍ͯͩ͘͞ɻ <\UJUMFB
QSJDF TQFDJBM-PXQSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF TQFDJBM-PXQSJDF^>

ԋश໰୊ ͋Δ"SSBZΦϒδΣΫτ͕༩͑ΒΕͨͱ͖ɺ ྫ ͑͹< > ͦͷதͰҎԼͷ਺ࣈ͕͍ͭ͋͘ Δ͔දࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ

ԋश໰୊ )BTIͷόϦϡʔͷதʹͱ͍͏จࣈؚ͕·Ε Δͱ͖ʹɺͦͷόϦϡʔΛେจࣈʹม׵ͨ͠ )BTIΛ࡞ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑͹ɺ \BMJDFZFBI CPCZP MJOEBXPX^ ˢͱ͍͏)BTIΛˣʹͰ͖Ε͹0,Ͱ͢ɻ \BMJDFZFBI
CPC:0 MJOEB808^

ԋश໰୊ จࣈྻXSJUFதͷFΛUFOʹஔ׵ ͠ɺXSJUUFOʹ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ώϯτɿจࣈྻͷஔ׵͸4USJOHHTVCΛ࢖͍·͢ɻ

ԋश໰୊ UFYU UFYU UFYU ͱ͍͏ͭͷจࣈྻΦϒδΣΫτ͕͋Δͱ͖ɺ਺஋ͱ͠ ͯ࠷΋େ͖͍΋ͷΛදࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ʢ͜ͷ৔߹ɺΛදࣔʣ ߟ͑ํͷҰྫɿ BSSBZΛ࡞Γɺ͜ͷͭΛ਺஋ΦϒδΣΫτʹม׵ͯ֨͠ೲͯ͠ɺNBYϝ ιουΛݺͿͱ࠷΋େ͖͍਺஋Λฦ͠·͢ɻ
ώϯτɿจࣈྻΦϒδΣΫτΛ਺஋ΦϒδΣΫτʹ͢Δͷ͸UP@Jϝιου UP@J

ԋश໰୊ Ҿ਺ʹϋογϡΛड͚औΔϝιουΛॻ͍ͯ͘ ͍ͩ͞ɻͦͷϝιουͷதͰɺҾ਺Ͱड͚औͬ ͨϋογϡʹΩʔUFYU͕ͳ͔ͬͨͱ ͖ɺ5IJTPCKFDUEPFTOPUIBWFUFYU LFZͱग़ྗ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ʢྫ͑͹ɺϝιου໊ΛQSJOU@UFYUͱͯ͠ɺ ϝιουݺͼग़͠ଆ͸ҎԼͷΑ͏ʹͳΓ·͢ɻʣ QSJOU@UFYU \UJUMFzUIF3VCZCPPLz^

ԋश໰୊ BMJDF CPC DBSPMͷࢼݧͷ఺਺͕࣍ͷΑ͏ʹ)BTIʹ֨ೲ͞Ε͍ͯ ·͢ɻ BMJDF\FOHMJTI NBUI IJTUPSZ^ CPC\FOHMJTI NBUI
IJTUPSZ^ DBSPM\FOHMJTI NBUI IJTUPSZ^ ֤Պ໨ͷฏۉ఺Λग़ྗ͍ͯͩ͘͠͞

ԋश໰୊ʲ্ڃʳ4 ͋ΔςΩετϑΝΠϧ͔ΒɺBͱ͍͏จࣈྻΛؚ Ήߦ͚ͩΛநग़ͨ͠ผͷςΩετϑΝΠϧΛ࡞ͬ ͍ͯͩ͘͞ɻ ྫɿ BMJDF CPC DBSPM ώϯτɿTFOUFODFͱ͍͏จࣈྻ͕ॻ͔ΕͨςΩετϑΝΠϧ Λ࡞Δͷ͸ҎԼͷίʔυʹͳΓ·͢ɻ
PVU@pMFOBNFPVUUYU PVU@pMF'JMFPQFO PVU@pMFOBNF X65' PVU@pMFQVUTTFOUFODF PVU@pMFDMPTF BMJDF DBSPM

ԋश໰୊ʲ্ڃʳ4 ೔ຊͷ౎ಓ෎ݝͰɺஉੑͱঁੑͷਓޱ͕ࠩ࠷΋େ ͖͍ͷ͸Ͳ͔͜ɺσʔλ͔Βղੳ͍ͯͩ͘͠͞ɻ ώϯτɿσʔλ͸ҎԼʹ͋Γ·͢ɻ IUUQXXXFTUBUHPKQ4(FTUBU-JTUEP உঁผਓޱٴͼੈଳͷछྨ ۠෼ ผੈଳ਺ͷ$47 ώϯτɿจࣈྫΛΧϯϚͰ۠੾ͬͯ"SSBZʹ͢Δʹ͸ 4USJOHTQMJUΛ࢖͍·͢ɻ
B C DTQMJU <B C D>

ԋशղ౴ ղ౴͸ҰྫͰ͢ɻ3VCZͷίʔυ͸͍Ζ͍Ζͳॻ͖ํ͕Մ ೳͰ͢ɻ͜͜ʹڍ͛ͨίʔυ͚͕ͩਖ਼ղͰ͸ͳ͍Ͱ͢ɻ େ੾ͳͷ͸ɺಡΈख΁ͷ৺഑Γͱࢥ͍΍ΓͰ͢ɻ

ه๏ͷઆ໌ ͱ͖Ͳ͖Ͱͯ͘Δ ͱ͍͏ϚʔΫ͸࣮ߦ݁ՌΛද͠·͢ɻ Q QBSSBZ< > ίʔυͰ͸ͳ͍ͷͰଧͨͳͯ͘େৎ෉Ͱ͢ɻ΋͠ଧͬͨ
ͱͯ͠΋ɺ͔Β࢝·ΔՕॴ͸ίϝϯτͱͯ͠ѻΘΕΔ ͷͰɺԿ΋ى͖·ͤΜɻ

ԋश໰୊ "SSBZΦϒδΣΫτͷཁૉ͕ح਺ͷ߲໨Λશͯ଍͢ίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑͹BSSBZ< >ͷ৔߹ɺ ͕දࣔ͞ΕΕ͹
0,Ͱ͢ɻ ώϯτɿح਺͔Ͳ͏͔ௐ΂Δͷ͸'JYOVNPEE ϝιου PEE ˠUSVF PEE ˠGBMTF ͪͳΈʹۮ਺͔ௐ΂Δͷ͸'JYOVNFWFO ϝιουͰ͢ɻ BSSBZ< > TVN BSSBZFBDIEPcJc TVN JJGJPEE FOE QTVN ߦͰ͔ͬ͜Α͘ॻ͘͜ͱ΋Ͱ͖·͢ɻ < >TFMFDU\cJcJPEE ^JOKFDU

ԋश໰୊ <\UJUMFB QSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF^> ͱ͍͏ΦϒδΣΫτ͔ΒɺҎԼͷΑ͏ͳΦϒδΣΫτΛ࡞ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ <\UJUMFB QSJDF
TQFDJBM-PXQSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF TQFDJBM-PXQSJDF^> JUFNT<\UJUMFB QSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF^> JUFNTFBDIEPcJUFNc JUFN<TQFDJBM>-PXQSJDFJGJUFN<QSJDF> FOE QJUFNT <\UJUMFB QSJDF TQFDJBM-PXQSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF TQFDJBM-PXQSJDF^>

ԋश໰୊ ͋Δ"SSBZΦϒδΣΫτ͕༩͑ΒΕͨͱ͖ɺ ྫ ͑͹< > ͦͷதͰҎԼͷ਺ࣈ͕͍ͭ͋͘ Δ͔දࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ BSSBZ<
> DPVOU BSSBZFBDIEPcJc DPVOU JGJ FOE QDPVOU BSSBZ< > QBSSBZDPVOU\cJcJ^ ผղɹDPVOUϝιουʹϒϩοΫΛ౉͢͜ͱͰΧ΢ϯτͰ͖·͢ɻ ϒϩοΫ͸EPFOEͷมΘΓʹ\^Ͱॻ͘͜ͱ΋Ͱ͖·͢ɻ

ԋश໰୊ )BTIͷόϦϡʔͷதʹͱ͍͏จࣈؚ͕·ΕΔͱ͖ʹɺͦͷό ϦϡʔΛେจࣈʹม׵ͨ͠)BTIΛ࡞ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑͹ɺ \BMJDFZFBI CPCZP MJOEBXPX^ ˢͱ͍͏)BTIΛˣʹͰ͖Ε͹0,Ͱ͢ɻ \BMJDFZFBI CPC:0
MJOEB808^ I\BMJDFZFBI CPCZP MJOEBXPX^ IFBDIEPcLFZ WBMVFc I<LFZ>WBMVFVQDBTFJGWBMVFd FOE QI \BMJDFZFBI CPC:0 MJOEB808^

ԋश໰୊ จࣈྻXSJUFதͷFΛUFOʹஔ׵ ͠ɺXSJUUFOʹ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ώϯτɿจࣈྻͷஔ׵͸4USJOHHTVCΛ࢖͍·͢ɻ XSJUFHTVC F UFO XSJUUFO HTVC͸ഁյతϝιουͰ͢ɻର৅ͷΦϒδΣΫτΛॻ͖׵͑·͢ɻͷͳ͍ HTVCͱ͍͏ϝιου΋͋Γ·͢ɻHTVC͸ஔ׵ͨ͠৽͍͠4USJOHΦϒδΣ
ΫτΛฦ͠·͢ɻҧ͍͸ҎԼͷίʔυΛ࣮ߦ͢Δͷ͕෼͔Γқ͍Ͱ͢ɻ TUSJOHXSJUF TUSJOHHTVC F UFO QTUSJOHXSJUUFO TUSJOHXSJUF TUSJOHHTVC F UFO QTUSJOHXSJUF

ԋश໰୊ UFYU UFYU UFYU ͱ͍͏ͭͷจࣈྻΦϒδΣΫτ͕͋Δͱ͖ɺ਺஋ͱͯ͠࠷΋େ͖͍΋ͷΛද ࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻʢ͜ͷ৔߹ɺΛදࣔʣ ߟ͑ํͷҰྫɿ BSSBZΛ࡞ͬͯ͜ͷͭΛ਺஋ͱͯ֨͠ೲͯ͠ɺNBYϝιουΛݺͿͱ࠷΋େ͖͍਺஋Λฦ͠·͢ɻ ώϯτɿจࣈྻΦϒδΣΫτΛ਺஋ΦϒδΣΫτʹ͢Δͷ͸UP@Jϝιου UP@J
UFYU UFYU UFYU BSSBZ<> BSSBZQVTIUFYUUP@J BSSBZQVTIUFYUUP@J BSSBZQVTIUFYUUP@J QBSSBZNBY

ԋश໰୊ EFGQSJOU@UFYU I QVUT5IJTPCKFDUEPFTOPUIBWFUFYULFZVOMFTTI<UFYU> FOE QSJOU@UFYU \UFYUUIF3VCZCPPL^ Ҿ਺ʹϋογϡΛड͚औΔϝιουΛॻ͍͍ͯͩ͘͞ɻͦͷϝιουͷதͰɺҾ਺Ͱड͚औͬͨ ϋογϡʹΩʔUFYU͕ͳ͔ͬͨͱ͖ɺ5IJTPCKFDUEPFTOPUIBWFUFYULFZͱग़ ྗ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ
ʢྫ͑͹ɺϝιου໊ΛQSJOU@UFYUͱͯ͠ɺϝιουݺͼग़͠ଆ͸ҎԼͷΑ͏ʹͳΓ·͢ɻʣ QSJOU@UFYU \UJUMFzUIF3VCZCPPLz^

ԋश໰୊ BMJDF CPC DBSPMͷࢼݧͷ఺਺͕࣍ͷΑ͏ʹ)BTIʹ֨ೲ͞Ε͍ͯ·͢ɻ BMJDF\FOHMJTI NBUI IJTUPSZ^ CPC\FOHMJTI NBUI IJTUPSZ^
DBSPM\FOHMJTI NBUI IJTUPSZ^ ֤Պ໨ͷฏۉ఺Λग़ྗ͍ͯͩ͘͠͞ BMJDF\FOHMJTI NBUI IJTUPSZ^ CPC\FOHMJTI NBUI IJTUPSZ^ DBSPM\FOHMJTI NBUI IJTUPSZ^ QVUTFOHMJTIBWFSBHF BMJDF<FOHMJTI> CPC<FOHMJTI> DBSPM<FOHMJTI> QVUTNBUIBWFSBHF BMJDF<NBUI> CPC<NBUI> DBSPM<NBUI> QVUTIJTUPSZBWFSBHF BMJDF<IJTUPSZ> CPC<IJTUPSZ> DBSPM<IJTUPSZ>

ԋश໰୊ʲ্ڃʳ4ղ ͋ΔςΩετϑΝΠϧ͔ΒɺBͱ͍͏จࣈྻΛؚΉߦͩ ͚Λநग़ͨ͠ผͷςΩετϑΝΠϧΛ࡞͍ͬͯͩ͘͞ɻ ྫɿ BMJDF CPC DBSPM BMJDF DBSPM ϑΝΠϧ͔ΒಡΈࠐΈ
JODMVEFE<>ग़ྗ༻σʔλΛ֨ೲ͢Δ"SSBZ JO@pMFOBNFJOUYU 'JMFPQFO JO@pMFOBNF S65' EPcJO@pMFc XIJMFUFYUJO@pMFHFUT JODMVEFEUFYUJGUFYUdB FOE FOE ϑΝΠϧ΁ॻ͖ࠐΈ PVU@pMFOBNFPVUUYU 'JMFPQFO PVU@pMFOBNF X65' EPcPVU@pMFc JODMVEFEFBDIEPcJc PVU@pMFQVUTJ FOE FOE ͭͷϑΝΠϧΛPQFO͠·͢ɻ ग़ྗଆ͸X65' ॻ͖ࠐΈ Ͱ͢ɻ ·ͨɺ'JMFPQFOʹϒϩοΫΛ ౉͢ͱϒϩοΫ׬ྃ࣌ʹࣗಈͰ DMPTF͠·͢

ԋश໰୊ʲ্ڃʳ4ղ ͋ΔςΩετϑΝΠϧ͔ΒɺBͱ͍͏จࣈྻΛؚΉߦͩ ͚Λநग़ͨ͠ผͷςΩετϑΝΠϧΛ࡞͍ͬͯͩ͘͞ɻ ྫɿ BMJDF CPC DBSPM BMJDF DBSPM JO@pMFOBNFJOUYU
PVU@pMFOBNFPVUUYU 'JMFPQFO JO@pMFOBNF S65' EPcJO@pMFc 'JMFPQFO PVU@pMFOBNF X65' EPcPVU@pMFc XIJMFUFYUJO@pMFHFUT PVU@pMFQVUTUFYUJGUFYUdB FOE FOE FOE JOͱPVUΛಉ࣌ʹ։͘ॻ͖ํͰ͢ɻ݁Ռ֨ೲ༻ͷ"SSBZ͕ෆཁʹͳΔͷͰ εοΩϦͰ͢ɻ

ԋश໰୊ʲ্ڃʳ4 ೔ຊͷ౎ಓ෎ݝͰɺஉੑͱঁੑͷਓޱ͕ࠩ࠷΋େ ͖͍ͷ͸Ͳ͔͜ɺσʔλ͔Βղੳ͍ͯͩ͘͠͞ɻ ώϯτɿσʔλ͸ҎԼʹ͋Γ·͢ɻ IUUQXXXFTUBUHPKQ4(FTUBU-JTUEP உঁผਓޱٴͼੈଳͷछྨ ۠෼ ผੈଳ਺ͷ$47 ώϯτɿจࣈྫΛΧϯϚͰ۠੾ͬͯ"SSBZʹ͢Δʹ͸ 4USJOHTQMJUΛ࢖͍·͢ɻ
B C DTQMJU <B C D> ࢲ΋·ͩॻ͍͍ͯͳ͍ͷͰɺ୭͔ॻ͚ͨΒίʔυΛࢲ·Ͱૹ͍ͬͯͩ͘͞ɻɿʣ

ߨٛࢿྉஔ͖৔ ߨٛࢿྉஔ͖৔Λͭ͘Γ·ͨ͠ɻ աڈͷࢿྉ͕%-Ͱ͖·͢ɻ IUUQTHJUIVCDPNIJUPUTVCBTIJSVCZMFDUVSF PS IUUQCJUMZSVCZMFDUVSF

ࡶஊɾ࣭໰༻GBDFCPPLάϧʔϓ GBDFCPPLάϧʔϓΛ࡞Γ·ͨ͠ IUUQTXXXGBDFCPPLDPNHSPVQTIJUPUTVCBTIJSC ɾՃೖඇՃೖ͸ࣗ༝Ͱ͢ ɾՃೖඇՃೖ͸੒੷ʹؔ܎͠·ͤΜ ɾࢀՃऀҰཡ͸ެ։͞Ε·͢ ɾॻ͖ࠐΈ͸ࢀՃऀͷΈݟ͑·͢ ɾر๬ऀ͸ΞΫηεͯ͠ࢀՃਃ੥͍ͯͩ͘͠͞ ɾࡶஊɺ࣭໰ɺٞ࿦ͳͲԿͰ΋ؾʹͤͣͲ͏ͧʙ ɾ࣭໰ʹ౴͑ΒΕΔਓ͸౴͍͑ͯ͋͛ͯͩ͘͞
ɾߨࢣਞ΋͓౴͑͠·͢ ɾೖͬͨΒܰࣗ͘ݾ঺հ͓Ͷ͕͍͠·͢

Ruby講義第8回

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