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Scalaのパターンマッチング!
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jewel12
March 24, 2013
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Scalaのパターンマッチング!
jewel12
March 24, 2013
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Transcript
4DBMBͷ ύλʔϯϚονϯάʂ !KFXFM@Y
4DBMB࢝Ί·ͨ͠
ࠓͷͱ͜ΖύλʔϯϚο νϯάͷ͕໘ന͔ͬͨ
ͦͦ4DBMBͱ ˎ+7.্Ͱಈ͘ ˎؔܕݴޠͱΦϒδΣΫτࢦݴޠͷ֓ ೦Λ౷߹ ˠεέʔϥϒϧͳݴޠʹ͢ΔͨΊ
4DBMBͷύλʔϯϚονϯά TXJUDIDBTFͷߴػೳ൛ ৭ʑͰ͖ͯศརͬΆ͍ʂʂʂ
NBUDI@UFTUϝιουͷҾW͕ Ͱ͋Δ͔ Ͱ͋Δ͔ ͦΕҎ֎͔ ఆύλʔϯ
Ϛον͢ΕΑΓӈΛධՁ͢Δ ҰϚον͢Ε࣍ͷDBTFจͱͷఆ͠ͳ͍ ఆύλʔϯ
ఆύλʔϯ NBUDI@UFTU NBUDI@UFTU NBUDI@UFTU Y
NBUDIࣜ3VCZͷDBTFΈ͍ͨʹΛฦ͢
γʔέϯεύλʔϯ @ Ξϯμʔόʔ ͋ΒΏΔ ΦϒδΣΫτʹϚον͢Δ NBUDI@UFTU -JTU
NBUDI@UFTU -JTU @ NBUDI@UFTU -JTU @
ܕ͖ύλʔϯ ܕͰϚονͤ͞Δ HFOFSBM4J[F BBB HFOFSBM4J[F .BQ B C
ܕ͖ύλʔϯ ܕͰϚονͤ͞Δ ˎܕΩϟετʹศར ˎYJT*OTUBODF0G<4USJOH>ͰʮT͕4USJOHͩͬͨΒʯ ˠΊͷϝιου໊ʹͯ͠NBUDIΛ͏Α͏ʹ ͚ΒΕ͍ͯΔ
ίϯετϥΫλύλʔϯ έʔεΫϥεͱݺΕΔͷΛ४උ 7BS͕ม /VNCFS͕ 6O0Q͕୯߲ԋࢉ #JO0Q͕ೋ߲ԋࢉΛද͢
ίϯετϥΫλύλʔϯ ܭࢉࣜͷ؆୯ԽϧʔϧΛNBUDIͰॻ͚Δ TJNQMJGZ5PQ 6O0Q 6O0Q 7BS Y 7BS
Y
நग़ࢠ VOBQQMZ ΠϯελϯεͷߏཁૉΛղͯ͠Ϛον ˎKPKPͷ໊લ͕z4IJPCBOB)BSVOPzͩͬͨΒ δϣϧϊɾδϣόΝʔφͱग़ྗ ˎKPKPͱ͍͏ΠϯελϯεมͷߏཁૉΛͱ໊ ʹղ͢ΔΧελϜύλʔϯΛ࡞͍ͯ͠Δ
நग़ࢠ VOBQQMZ ΠϯελϯεͷߏཁૉΛղͯ͠Ϛον ຊਓΫϥε
நग़ࢠ VOBQQMZ ˎಛผͳϝιουVOBQQMZΛఆٛ ˠίϯετϥΫλύλʔϯͰݺͼग़͞ΕΔ ˠҾʹϚονର͕͘Δ
4DBMBͷύλʔϯϚονϯά TXJUDIDBTFͷߴػೳ൛ ৭ʑͰ͖ͯศརͬΆ͍ʂʂʂ
ษڧதͷײ
ଟػೳΏ͑ʹֶशίετ͕ ߴ͍ؾ͕͢Δ
༷ʑͳ෦͕ྑ͘ߟ͑ΒΕ͍ͯΔ XLUL͕ࢭ·Βͳ͍ʂ