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秋田でRubyを入り口として プログラミングを楽しむ会 (仮称) Rubyをはじめよう編
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Katsuyoshi Ito
May 27, 2012
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秋田でRubyを入り口として プログラミングを楽しむ会 (仮称) Rubyをはじめよう編
Katsuyoshi Ito
May 27, 2012
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Transcript
ळాͰ3VCZΛೖΓޱͱͯ͠ ϓϩάϥϛϯάΛָ͠Ήձ Ծশ ͔ͭΑ͠ ༗ݶձࣾҏ౻ιϑτσβΠϯ "LJUBN 3VCZΛ͡ΊΑ͏ฤ
ಋೖ w8JOEPXT wCSFX ෳόʔδϣϯͷڥ w.BD w.BD1PSUT w37.
ෳόʔδϣϯͷڥ
8JOEPXTฤ ✓"DUJWF4DSJQU3VCZ ✓0OF$MJDL3VCZ*OTUBMMFSGPS 8JOEPXT
.BDฤ ✓࠷ॳ͔Β͋Δ ✓Yʹ͢Δʹ৭ʑҾ͔͔ͬΔ߹ ͕͋Δɻ ಛʹ-JPO ✓1PSUTΛ͑େৎʁ ✓.BD049ͷΠϯετʔϧ
։ൃڥ ✓ςΩετΤσΟλʔ ✓ίϯιʔϧ
ςΩετΤσΟλʔ ✓Ԧಓ ✓&NBDT ✓7JN ✓ͦͷଞ ✓ϝϞாͰग़དྷ·͢
ςΩετΤσΟλʔ w8JOEPXT w3VWJ&EJU wϝϞா͍͚·͢
ςΩετΤσΟλʔ w.BD w5FYU.BUF ຊޠͷѻ͍ʹ w9DPEF wςΩετΤσΟτͰ͍͚·͢
*%& w/FU#FBOT ϓϥάΠϯՃ w&DMJQTF ϓϥάΠϯՃ wSE3BJMɹ &NCBSDBEFSPɹچ#PSMBOE w*OUFMMJ+*%&"͑Δʁ ϓϥάΠϯՃʁ
ίϯιʔϧ wϓϩάϥϜͷ࣮ߦ wฤूՄ
ϓϩάϥϜͷ࣮ߦ wJSC wSVCZίϚϯυ w࣮ߦίϚϯυ
JSC wSVCZ࣮ߦڥ
SVCZίϚϯυ wSVCZDPNNBOESC SVCZBCDSC
࣮ߦίϚϯυ ✓TIFCBOH ✓ߦ಄ʹ QBUIUPDPNNBOE ✓ YͰ࣮ߦݖݶΛ࣋ͨͤΔ
3VCZͷจ๏ ࢀߟ: RubyϨγϐϒοΫ
Ϧςϥϧ ✓ ✓จࣈ ✓γϯϘϧ ✓ྻ ✓ϋογϡ ✓ਖ਼نදݱ ✓ίϚϯυग़ྗ
Ϧςϥϧ ✓ ✓ݻఆ 'JYOVN ✓ଟഒ #JHOVN
✓γʔϜϨεʹม ✓@@ͱॻ͚Δ ✓গ ✓Ծ෦ ✓ࢦ෦ ͷ ✓F
จࣈϦςϥϧ ✓lzͰғΉ ✓ಛघจࣈaO͑Δl)FMMPaOz ✓ࣜల։͑Δl\B^z ✓b`ͰғΉ ✓ಛघจࣈࣜͦͷ··දࣔ͞ΕΔ ✓ଞ͋Δ͕ࠓ͜͜·Ͱ
γϯϘϧ ✓Ͱ࢝·Δ TZN ✓εϖʔεؚΉ߹zTZNBzT<TZNB> ✓จࣈͱͷҧ͍ ✓ϢχʔΫ lBCDzͱzBCDz࣮ଶ͕ҧ͏߹͕͋Δ
BCDͱBCDಉ͡ ✓༻్ ✓ϝιου໊ ✓ϋογϡͷΩʔ
ྻ ✓<>ͰғΈཁૉ Ͱ۠Δ < > ✓จࣈͷ߹X ɺ8
͕ศར <lBz lCz lDz> X BCD <lBz lCz lDz> TlBz8 \T^CD <lBz lCz lDz> ✓ೖΕࢠՄ << > < >>
ϋογϡ ✓λά͚͞Εͨ \^ͰғΈΩʔͱΛͰࢦఆ \lࠃޠz lࢉz^ ✓\^ͰғΈ Ͱ۠ΔɻΩʔɺͷॱ \lࠃޠz
lࢉz ^ ✓\^ͰғΈΩʔͷޙΖʹΛ༻͍Δɻ \ࠃޠ ࢉ^Y͔Βʁ ෆ໌
ਖ਼نදݱ ✓จࣈྻͷύλʔϯ நग़ɺஔ ✓ͰғΉ 3VCZ ✓SΛ͏ ccɺɺ
ɺ<>ɺ\^ɺͱΈ߹ΘͤΔ Sc3VCZc ✓վΊͯઆ໌
ίϚϯυग़ྗ ✓ίϚϯυ࣮ߦ݁ՌΛಘΔ ✓AA γϯάϧΫΥʔτ ͰғΉ AFDIP3VCZA l3VCZz ✓Y ͑Δ
Y FDIP3VCZ l3VCZz
มͱఆ ✓ม খจࣈ͔Β࢝·Γ୯ޠؒΞϯλʔε ίΞͰܨ͙ ✓ϩʔΧϧม VTFS@JE
✓Πϯελϯεมɹ !VTFS@JE ✓Ϋϥεม !!VTFS@JE ✓άϩʔόϧม VTFS@JE ✓ٙࣅม ✓ఆ େจࣈ͔Β࢝·Δ 64&3@*%
ϩʔΧϧม ✓είʔϓͰͷΈࢀরՄೳ \^ͰͷΈF͕ࢀরग़དྷΔ [1,2,3].each{|e| puts e }
Πϯελϯεม ✓ΦϒδΣΫτͰࢀরՄ ✓ΠϯελϯεԽ͔ͯ͠Β ✓!Λ಄ʹ͚Δ class Foo @a = 123 def
bar puts @a end end f = Foo.new f.puts # => 123
Ϋϥεม ✓ΫϥεɺαϒΫϥεٴͼ Πϯελϯε͔ΒࢀরՄ ✓ΠϯελϯεԽෆཁ ✓!!Λ಄ʹ͚Δ class Foo @@a = 123
def self.bar puts @@a end end Foo.puts # => 123
άϩʔόϧม ✓Կॲ͔ΒͰݺͼग़ͤΔ ✓Λ಄ʹ͚Δ ✓༧Ί༻్͕ܾ·͍ͬͯΔͷ͋Δ
ٙࣅม ✓ಛघͳม ఆ TFMG USVF GBMTF OJM @@'*-&@@
@@-*/&@@
ఆ ✓େจࣈ͔Β࢝·Δ $POTU ✓มߋෆՄ
ϝιου ✓͋Δ·ͱ·ͬͨॲཧΛͤ͞Δ ✓จࣈΛग़ྗ ✓Λܭࢉ
ݺͼग़͠ํ๏ ✓ΦϒδΣΫτ໊ϝιου໊ Ҿ LBUTVCVZ l3VCZz ✓ লུՄ
LBUTVCVZl3VCZz ✓ؔతϝιου ΦϒδΣΫτ໊ͳ͠ TFMGʹରͯ͠ݺͼग़͠ QVUTl3VCZz
QSJOU wจࣈΛग़ྗ wQSJOUจࣈϑΥʔϚοτࢦఆՄ վΊͯ wվߦ͠ͳ͍ wվߦaO XJOEPXT=O
QVUT wจࣈΛग़ྗ wQVUTจࣈϑΥʔϚοτࢦఆՄ վΊͯ wվߦ͢Δ aOෆཁ
͓ )FMMP 8PSME
͓ )FMMP 8PSME ✓QSJOUl)FMMP 8PSMEaOz
͓ )FMMP 8PSME ✓QSJOUl)FMMP 8PSMEaOz ✓QVUTl)FMMP 8PSMEz
͓ )FMMP 8PSME ✓QSJOUl)FMMP 8PSMEaOz ✓QVUTl)FMMP 8PSMEz ✓USZ QSJOUl)FMMP z
l8PSMEaOz QVUTl)FMMP l l8PSMEz
ೖ w B wଟॏೖ
B C D
ίϝϯτ w ͜͜ίϝϯτ wCFHJOFOE CFHJO ͜͜ίϝϯτ
FOE
੍ޚߏจ
݅ذ ✓JG ✓VOMFTT ✓DBTF
JG JGࠓӍͳΒ ࡿΛ࣋ͬͯߦ͘ FMTF ࡿΛ࣋ͬͯߦ͔ͳ͍ FOE
VOMFTT VOMFTTࠓӍ͡Όͳ͔ͬͨΒ ࡿΛ࣋ͬͯߦ͔ͳ͍ FMTF ࡿΛ࣋ͬͯߦ͘ FOE
DBTF DBTFࠓͷఱؾ͕ XIFOӍͳΒ ࡿΛ࣋ͬͯߦ͘ XIFO͘Γ Ε͔ͳΒ ࡿΛ࣋ͬͯߦ͔ͳ͍ FMTF ՈʹډΔ FOE
JGम০ VOMFTTम০ QVUTlࠓΕͰ͢zJGࠓ͕ΕͳΒ QVUlࠓग़͔͚·ͤΜzVOMFTTࠓ͕Ε͡Όͳ ͔ͬͨΒ EFGTVNO T VQUPOEPcJc T J
FOEVOMFTTO T FOE
܁ฦ͠ ✓XIJMF ✓VOUJM ✓GPS
XIJMF XIJMF৽װઢʹ͍ͬͯΔEPؒ EPলུՄ QVUTlಡॻͯ͠·͢z FOE
VOUJM VOUJMं͕དྷΔEP·Ͱ EPলུՄ QVUTlҋʹ͘Δ·ͬͯΔz͚ͩ͊ FOE
GPS GPSมJOΦϒδΣΫτEPFOE GPSTJO< zμʔz>EPEPলུՄ QVUTT FOE
GPS < zμʔz>FBDIEPcTcEPলུՄ QVUTT FOE ✓GPSγϯλοΫεγϡΨʔ ✓ΠςϨʔλʔΛ͏
ଞͷݴޠͷ༷ʹ͍ͨ͠߹ VQUPEPcJc QVUTJ FOE FBDIEPcJc QVUTJ FOE Cݴޠ GPS
JJJ \ QSJOU lEz J ^ BASIC෩ C෩ UJNFTEPcJc QVUTJ FOE Rubyݴޠ
ճ࣮ߦ͔ͤͯ͞Β ✓CFHJOFOEͱXIJMFVOUJMFͷ߹ CFHJO QVUTlಡॻͯ͠·͢z FOEXIJMF৽װઢʹ͍ͬͯΔؒ CFHJO QVUTlҋʹ͘Δ·ͬͯΔz͚ͩ͊ FOEVOUJMं͕དྷΔ·Ͱ
ϒϩοΫ ✓ॲཧΛ·ͱΊͨͷ
ϒϩοΫ ✓ॲཧΛ·ͱΊͨͷ < zμʔz>FBDIEPcTc QVUTT FOE <
zμʔz>FBDI\cTc QVUTT ^ ✓EP͔ΒFOE·ͰͰɺ\^͑Δ
ϒϩοΫ ✓ॲཧΛ·ͱΊͨͷ < zμʔz>FBDI CMPDL ✓ϝιουͷҾͱ͍ͯͯ͠͠Δ <
zμʔz>FBDIEPcTc QVUTT FOE < zμʔz>FBDI\cTc QVUTT ^ ✓EP͔ΒFOE·ͰͰɺ\^͑Δ
͓ )FMMP 8PSMEΛߦදࣔ
͓ )FMMP 8PSMEΛߦදࣔ UJNFTEP QVUTl)FMMP 8PSMEz FOE
͓ )FMMP 8PSMEΛߦදࣔ UJNFTEP QVUTl)FMMP 8PSMEz FOE <l)FMMP 8PSMEz>
FBDIEPcTc QVUTT FOE
͓ )FMMP 8PSMEΛߦදࣔ UJNFTEP QVUTl)FMMP 8PSMEz FOE QSJOUl)FMMP 8PSMEaOz
<l)FMMP 8PSMEz> FBDIEPcTc QVUTT FOE
ࢀরαΠτ ✓3VCZ ެࣜαΠτ ✓Δͼ·ɹ 8FCϚΨδϯ ✓ΔΓ·
υΩϡϝϯτ ✓3VCZιʔείʔυશղઆͬͱৄ͘͠
ϝʔϦϯάϦετ •
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