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Kuniaki IGARASHI
May 26, 2013
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Ruby08
Ruby講義 第8回 各種演習
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Kuniaki IGARASHI
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Transcript
3VCZߨٛ ୈճ֤छԋश ޒेཛྷ໌ UXJUUFSJHBJHB IUUQXXXGBDFCPPLDPNLVOJBLJJHBSBTIJ BUҰڮେֶ χϑςΟגࣜձࣾدෟߨٛ ࣾձՊֶʹ͓͚Δใٕज़ͱ ίϯςϯπ࡞ᶙ
ޒेཛྷ໌ ߨࢣ גࣜձࣾສ༿ UXJUUFSJHBJHB IUUQTHJUIVCDPNJHBJHB IUUQXXXGBDFCPPLDPNLVOJBLJJHBSBTIJ
ᖛ࡚݈ޗ 5FBDIJOH"TTJTUBOU qVYqFY JOD ถࠃ๏ਓ UXJUUFSINTL IUUQTHJUIVCDPNINTL IUUQXXXGBDFCPPLDPNIBNBDIBOH
ҎԼͷϑΝΠϧΛXJLJQFEJBղੳ ԋशͰ͏ͷͰ%-͍ͯͩ͘͠͞ɻ IUUQCJUMZXQEBUB IUUQCJUMZXQEBUBNJOJ
ԋशಛू 8JLJQFEJBΞΫηεղੳ ԋश࣌ؒ ԋश࣌ؒ ԋशͷղͱղઆ ࣍
ԋशͷલʹ ͚ͭͩ 3VCZͷઆ໌
ഁյతϝιουͷઆ໌ VQDBTFͱVQDBTF 4USJOHVQDBTFͱ4USJOHVQDBTF ͲͪΒจࣈྻΛେจࣈʹ͢ΔϝιουͰ͢ɻ JSCͰ࣮ߦ͢ΔͱͲͪΒಉ͡Α͏ʹݟ͑·͕͢ɺ ͷ༗ແͰԿ͕ҧ͏ͷͰ͠ΐ͏ʁ BCDVQDBTF"#$ BCDVQDBTF"#$
BCD ࣮ߦલ ΦϒδΣΫτ "#$ BCDVQDBTF BCDVQDBTF ࣮ߦޙ ΦϒδΣΫτ VQDBTF ΦϒδΣΫτ
͕ม͢Δ BCD ࣮ߦલ ΦϒδΣΫτ "#$ ࣮ߦޙ ৽ΦϒδΣΫτ VQDBTF BCD چΦϒδΣΫτ มͨ͠ ৽͍͠ ΦϒδΣΫτ ͕ෳ͞ΕΔ
BCD ࣮ߦલ ΦϒδΣΫτ "#$ BCDVQDBTF ࣮ߦޙ ΦϒδΣΫτ VQDBTF ΦϒδΣΫτ ͕ม͢Δ
VQDBTFͷ͍ํ BBCD BCD B "#$ B BVQDBTF มB͕ࢦ͢ΦϒδΣΫτ͕BCD͔Β"#$ʹม มBΛͦͷ··͏
VQDBTFͷ͍ํ BBCD BCD "#$ C BCDVQDBTF BCD ࣮ߦલ ΦϒδΣΫτ "#$
࣮ߦޙ VQDBTF มͨ͠ ৽͍͠ ΦϒδΣΫτ ͕ෳ͞ΕΔ BCD چΦϒδΣΫτ B BCD B ৽ΦϒδΣΫτ CBVQDBTF ෳ͞ΕͨΦϒδΣΫτΛผͷม ͜͜ͰC ʹೖΕΔ
BCD ࣮ߦલ ΦϒδΣΫτ "#$ BCDVQDBTF ࣮ߦޙ ΦϒδΣΫτ VQDBTF ΦϒδΣΫτ ͕ม͢Δ
ഁյతϝιου VQDBTFͷΑ͏ʹΦϒδΣΫτͷ༰Λ มߋ͢ΔͷΛʮഁյతϝιουʯͱݴ͍·͢ ϝιου໊ඌʹ͕͍ͭͨΒഁյతϝιου ʢͨͩ͠ɺഁյతϝιουͰ͕͔ͳ͍ͷ͋Δʣ
8JLJQFEJB ΞΫηεղੳ ෮श
8JLJQFEJBͷΞΫηεղੳ XJLJQFEJB࣌ؒ͝ͱͷΞΫηεσʔλΛެ։ ͍ͯ͠·͢ɻ IUUQEVNQTXJLJNFEJBPSHPUIFSQBHFDPVOUTSBX
8JLJQFEJBΞΫηεσʔλ KBC$ KBC$$#$"'$#'$#%$"$"$$"$$"' $#%$#$"$"'$#'$#%$"'$#'$#% $"'$#%$"$$"'$#%$"$$"$"%$"' $#'$#%$"'$#%$" KBC&&#&&&#&&""&% "&#&&"#&'&"&$"$@ &$#&@&#& KBC&"&"&"%&"
&&"&"&"&&##&% &#@&%&#$&#'&"#&## &&"%&#&"&"' &&"& KBC&"&"&"%&" &&"&"&"&&##&% &#@&"&&#" &"&"&"%&" &&"&"&"&"'&'#$' ͍ͬͯ͏σʔλ͕ेສߦ
8JLJQFEJBΞΫηεσʔλ σʔλߏΛݟΔͨΊʹͪΐͬͱಡΈ͘͢ม͑ͨͷ KBCΞʔςΟΩϡϨʔγϣϯΛද͢ه߸ KBCΧςΰϦελϒ KBCΧςΰϦେֶೖࢼ KBCΧςΰϦຽ๏ KBCΧςΰϦࣾձֶ KBCΧςΰϦ6TFS@CH KBCΧςΰϦ6TFS@VL KBCΨεࣄۀ๏ୈ
KBCΨϦΞઓه KBCΨϦΞઓهࢀরը૾Ұཡ KBCίϯτϥΫτϒϦοδϧʔϧ KBCίϯτϥΫτϒϦοδϧʔϧείΞϦϯά ͍ͬͯ͏σʔλ͕ेສߦ
8JLJQFEJBΞΫηεσʔλ ݴޠछผɹϖʔδλΠτϧɹΞΫηεɹ༰ྔ KBC$ KBC$$#$"'$#'$#%$"$"$$"$ $"'$#%$#$"$"'$#'$#%$"'$#' $#%$"'$#%$"$$"'$#% $"$$"$"%$"'$#'$#%$"'$#% $" KBC&&#&&&#&&""&% "&#&&"#&'&"&$
"$@&$#&@&#& ͜ͷσʔλΛղੳͯ͠ɺ͋Δ࣌ؒͷΞΫηετο ϓΛίʔυΛॻ͍ͯௐͯΈ·͢ɻ ؆୯ʹݴ͏ͱɺʮΞΫηεʯཝͷ͕େ͖͍ͷ͔ ΒݸɺͦͷʮϖʔδλΠτϧʯΛදࣔͤ͞Δ
8JLJQFEJBͷΞΫηεղੳ ίʔυͰॻ͘ࡍͷॲཧͷྲྀΕ σʔλϑΝΠϧΛ։͘ σʔλϑΝΠϧ͔ΒߦಡΈࠐΉ ຊޠσʔλҎ֎ύε σʔλߦ͔ΒλΠτϧͱΧϯτΛऔಘ औಘσʔλΛ͍Εͷʹ٧Ίͯͱ͓ͬͯ͘ σʔλϑΝΠϧશߦʹ͍ͭͯ܁Γฦ͠ σʔλϑΝΠϧΛด͡Δ ஷ·ͬͨσʔλΛΧϯτॱʹιʔτʢฒସ͑ʣ
τοϓ݅දࣔ
8JLJQFEJBͷΞΫηεղੳ FODPEJOHVUG SFRVJSFDHJ pMFOBNFKBUYU pMF'JMFPQFO pMFOBNF S65' MJTU<> XIJMFUFYUpMFHFUT CFHJO
OFYUVOMFTTUFYUd?KB EBUBUFYUTQMJU I\UJUMF$(*VOFTDBQF EBUB<> DPVOUEBUB<>^ MJTUQVTII SFTDVF&YDFQUJPOF QF FOE FOE pMFDMPTF DPVOUॱʹιʔτ SFTVMUMJTUTPSU@CZEPcJc J<DPVOU>UP@J FOE τοϓදࣔ SFTVMUSFWFSTFpSTU FBDIEPcJc QVUTJ FOE
8JLJQFEJBͷΞΫηεղੳԋश Dલड़ͷίʔυΛ࣮ߦ͍ͯͩ͘͠͞ɻ wSCϑΝΠϧͱσʔλϑΝΠϧಉ͡ϑΥϧμʹஔ͍͍ͯͩ͘͞ɻ wߦ‑ΛσʔλϑΝΠϧͷ໊લʹมߋ͢Δඞཁ͕͋Γ·͢ɻ چɿI\UJUMF$(*VOFTDBQF EBUB<> DPVOUEBUB<>^ ৽ɿI\UJUMF$(*VOFTDBQF EBUB<> FODPEF
DQ DPVOUEBUB<>^ ˞8JOͰग़ྗ͕aV'%%aVaV&ͷΑ͏ʹͳΔ߹ߦΛ ҎԼͷίʔυͰࠩ͠ସ͍͑ͯͩ͘͞ɻDQจࣈίʔυͷҰछͰ͢ɻ pMFOBNFKBUYU wσʔλϑΝΠϧͭ༻ҙ͍ͯ͠·͢ɻ ɹ·ͣখ͍͞ํͰίʔυ͕͏·͘ಈ͘͜ͱΛ֬ೝͯ͠Έ·͠ΐ͏ɻ ɹ[JQܗࣜͰѹॖͯ͋͠ΔͷͰɺղౚͯ͠ར༻͍ͯͩ͘͠͞ɻ ɹɹ 8JOϑΝΠϧબͯ͠ӈΫϦοΫϝχϡʔ͔Βʮͯ͢ల։ʯɺ.BDϑΝΠϧΛμϒϧΫϦοΫ ɹKBUYU ɹɹɹ࿅श༻ͷখ͍͞σʔλ IUUQCJUMZXQEBUBNJOJ ɹQBHFDPVOUT ɹɹɹ%-Ͱ͖Δ࣮ࡍͷσʔλ IUUQCJUMZXQEBUB
8JLJQFEJBͷΞΫηεղੳԋश Dʲ্ڃʳσʔλΛ͍ͯ͠ΔαΠτ͔Βҙͷ σʔλΛμϯϩʔυͯ͠ղੳ͍ͯͩ͘͠͞ɻ IUUQEVNQTXJLJNFEJBPSHPUIFSQBHFDPVOUTSBX ώϯτɿH[ܗࣜͰѹॖͯ͋͠ΔͷͰɺղౚ͕ඞཁͰ͢ɻ 7. .BDͷ߹λʔϛφϧ͔ΒHVO[JQϑΝΠϧ໊ͰղౚͰ͖·͢ɻ 8JOEPXTͷ߹ྫ͑-IBQMVTΛͬͯղౚͰ͖·͢ɻ IUUQXXXGPSFTUJNQSFTTDPKQMJCBSDBSDIJWFBSDIJWFSMIBQMVTIUNM ղͨ͠ϑΝΠϧΛSCϑΝΠϧͱಉ͡ϑΥϧμʹஔ͠ɺ
ίʔυߦͷpMFOBNFΛղౚͨ͠ϑΝΠϧ໊ʹมߋ͍ͯͩ͘͠͞ɻ
ԋशू ͲΕ͔Βղ͍ͯ0,Ͱ͢ɻ
ԋश "SSBZΦϒδΣΫτͷཁૉ͕حͷ߲Λશͯ͢ ίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑BSSBZ< >ͷ߹ɺ
͕දࣔ͞ΕΕ0,Ͱ͢ɻ ώϯτɿح͔Ͳ͏͔ௐΔͷ'JYOVNPEE ϝιου ͪͳΈʹۮ͔ௐΔͷ'JYOVNFWFO ϝιουͰ͢ɻ PEE USVF PEE GBMTF
ԋश <\UJUMFB QSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF^> ͱ͍͏ΦϒδΣΫτ͔ΒɺҎԼͷΑ͏ͳΦϒδΣΫτΛ࡞Δί ʔυΛॻ͍͍ͯͩ͘͞ɻ <\UJUMFB
QSJDF TQFDJBM-PXQSJDF^ \UJUMFC QSJDF^ \UJUMFD QSJDF TQFDJBM-PXQSJDF^>
ԋश ͋Δ"SSBZΦϒδΣΫτ͕༩͑ΒΕͨͱ͖ɺ ྫ ͑< > ͦͷதͰҎԼͷࣈ͕͍ͭ͋͘ Δ͔දࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ
ԋश )BTIͷόϦϡʔͷதʹͱ͍͏จࣈؚ͕·Ε Δͱ͖ʹɺͦͷόϦϡʔΛେจࣈʹมͨ͠ )BTIΛ࡞ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑ɺ \BMJDFZFBI CPCZP MJOEBXPX^ ˢͱ͍͏)BTIΛˣʹͰ͖Ε0,Ͱ͢ɻ \BMJDFZFBI
CPC:0 MJOEB808^
ԋश จࣈྻXSJUFதͷFΛUFOʹஔ ͠ɺXSJUUFOʹ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ώϯτɿจࣈྻͷஔ4USJOHHTVCΛ͍·͢ɻ
ԋश UFYU UFYU UFYU ͱ͍͏ͭͷจࣈྻΦϒδΣΫτ͕͋Δͱ͖ɺͱ͠ ͯ࠷େ͖͍ͷΛදࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ʢ͜ͷ߹ɺΛදࣔʣ ߟ͑ํͷҰྫɿ BSSBZΛ࡞Γɺ͜ͷͭΛΦϒδΣΫτʹมͯ֨͠ೲͯ͠ɺNBYϝ ιουΛݺͿͱ࠷େ͖͍Λฦ͠·͢ɻ
ώϯτɿจࣈྻΦϒδΣΫτΛΦϒδΣΫτʹ͢ΔͷUP@Jϝιου UP@J
ԋश ҾʹϋογϡΛड͚औΔϝιουΛॻ͍ͯ͘ ͍ͩ͞ɻͦͷϝιουͷதͰɺҾͰड͚औͬ ͨϋογϡʹΩʔUFYU͕ͳ͔ͬͨͱ ͖ɺ5IJTPCKFDUEPFTOPUIBWFUFYU LFZͱग़ྗ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ʢྫ͑ɺϝιου໊ΛQSJOU@UFYUͱͯ͠ɺϝιουݺͼग़͠ଆ ҎԼͷΑ͏ʹͳΓ·͢ɻʣ QSJOU@UFYU \UJUMFzUIF3VCZCPPLz^
ԋश BMJDF CPC DBSPMͷࢼݧͷ͕࣍ͷΑ͏ʹ)BTIʹ֨ೲ͞Ε͍ͯ ·͢ɻ BMJDF\FOHMJTI NBUI IJTUPSZ^ CPC\FOHMJTI NBUI
IJTUPSZ^ DBSPM\FOHMJTI NBUI IJTUPSZ^ ֤ՊͷฏۉΛग़ྗ͍ͯͩ͘͠͞
ԋशʲ্ڃʳ4 ͋ΔςΩετϑΝΠϧ͔ΒɺBͱ͍͏จࣈྻΛؚ Ήߦ͚ͩΛநग़ͨ͠ผͷςΩετϑΝΠϧΛ࡞ͬ ͍ͯͩ͘͞ɻ ྫɿ BMJDF CPC DBSPM ώϯτɿTFOUFODFͱ͍͏จࣈྻ͕ॻ͔ΕͨςΩετϑΝΠϧ Λ࡞ΔͷҎԼͷίʔυʹͳΓ·͢ɻ
BMJDF DBSPM PVU@pMFOBNFPVUUYU PVU@pMF'JMFPQFO PVU@pMFOBNF X65' PVU@pMFQVUTTFOUFODF PVU@pMFDMPTF
ԋशʲ্ڃʳ4 ຊͷಓݝͰɺஉੑͱঁੑͷਓޱ͕ࠩ࠷େ ͖͍ͷͲ͔͜ɺσʔλ͔Βղੳ͍ͯͩ͘͠͞ɻ ώϯτɿσʔλҎԼʹ͋Γ·͢ɻ IUUQXXXFTUBUHPKQ4(FTUBU-JTUEP MJE உঁผਓޱٴͼੈଳͷछྨ ۠ ผੈଳͷ$47 ώϯτɿจࣈྫΛΧϯϚͰ۠ͬͯ"SSBZʹ͢Δʹ
4USJOHTQMJUΛ͍·͢ɻ B C DTQMJU <B C D>
ԋशղ ղҰྫͰ͢ɻ3VCZͷίʔυ͍Ζ͍Ζͳॻ͖ํ͕Մ ೳͰ͢ɻ͜͜ʹڍ͛ͨίʔυ͚͕ͩਖ਼ղͰͳ͍Ͱ͢ɻ େͳͷɺಡΈखͷ৺Γͱࢥ͍ΓͰ͢ɻ
ه๏ͷઆ໌ ͱ͖Ͳ͖Ͱͯ͘Δ ͱ͍͏ϚʔΫ࣮ߦ݁ՌΛද͠·͢ɻ Q QBSSBZ< > ίʔυͰͳ͍ͷͰଧͨͳͯ͘େৎͰ͢ɻ͠ଧͬͨ
ͱͯ͠ɺ͔Β࢝·ΔՕॴίϝϯτͱͯ͠ѻΘΕΔ ͷͰɺԿى͖·ͤΜɻ
ԋश "SSBZΦϒδΣΫτͷཁૉ͕حͷ߲Λશͯ͢ίʔυΛॻ͍͍ͯͩ͘͞ɻ ྫ͑BSSBZ< >ͷ߹ɺ ͕දࣔ͞ΕΕ
0,Ͱ͢ɻ ώϯτɿح͔Ͳ͏͔ௐΔͷ'JYOVNPEE ϝιου ͪͳΈʹۮ͔ௐΔͷ'JYOVNFWFO ϝιουͰ͢ɻ BSSBZ< > TVN BSSBZFBDIEPcJc TVN JJGJPEE FOE QTVN ߦͰ͔ͬ͜Α͘ॻ͘͜ͱͰ͖·͢ɻ ্ڃऀ͚ < >TFMFDU\cJcJPEE ^JOKFDU PEE USVF PEE GBMTF
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^> ࣮ߦ݁Ռ
ԋश ͋Δ"SSBZΦϒδΣΫτ͕༩͑ΒΕͨͱ͖ɺ ྫ ͑< > ͦͷதͰҎԼͷࣈ͕͍ͭ͋͘ Δ͔දࣔ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ BSSBZ<
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ԋश จࣈྻXSJUFதͷFΛUFOʹஔ ͠ɺXSJUUFOʹ͢ΔίʔυΛॻ͍͍ͯͩ͘͞ɻ ώϯτɿจࣈྻͷஔ4USJOHHTVCΛ͍·͢ɻ XSJUFHTVC F UFO XSJUUFO HTVCഁյతϝιουͰ͢ɻରͷΦϒδΣΫτΛॻ͖͑·͢ɻͷͳ͍ HTVCͱ͍͏ϝιου͋Γ·͢ɻHTVCஔͨ͠৽͍͠4USJOHΦϒδΣ
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ɾࡶஊɺ࣭ɺٞͳͲԿͰؾʹͤͣͲ͏ͧʙ ɾ࣭ʹ͑ΒΕΔਓ͍͑ͯ͋͛ͯͩ͘͞ ɾߨࢣਞ͓͑͠·͢ ɾೖͬͨΒܰࣗ͘ݾհ͓Ͷ͕͍͠·͢