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the world of characters
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orisano
September 13, 2018
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the world of characters
orisano
September 13, 2018
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Transcript
1จࣈͷੈք @orisano
Έͳ͞Μ จࣈΛ͑ΒΕ·͢ΑͶʁ
a
a => 1
͋
͋ => 1
佛
佛 => 1
None
=> 1
None
=> 1
Z͑ͫ̓ͪ̂ͫ̽ ̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ ͫ͗ ͢ L̠ͨͧͩ͘ G̴̻͈͍͔̹ ̑͗̎̅͛ ́ Ǫ̵̹̻̝̳ ͂̌
̌͘! ͖̬̰̙̗ ̿̋ ͥ ͥ̂ͣ̐́́͜͞
Z͑ͫ̓ͪ̂ͫ̽ ̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ ͫ͗ ͢ L̠ͨͧͩ͘ G̴̻͈͍͔̹ ̑͗̎̅͛ ́ Ǫ̵̹̻̝̳ ͂̌
̌͘! ͖̬̰̙̗ ̿̋ ͥ ͥ̂ͣ̐́́͜͞ => 6
Έͳ͞Μ όΠτΛ͑ΒΕ·͔͢ʁ (UTF-8)
a
a => 1
͋
͋ => 3
佛
佛 => 4
None
=> 4
None
=> 18
Z͑ͫ̓ͪ̂ͫ̽ ̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ ͫ͗ ͢ L̠ͨͧͩ͘ G̴̻͈͍͔̹ ̑͗̎̅͛ ́ Ǫ̵̹̻̝̳ ͂̌
̌͘! ͖̬̰̙̗ ̿̋ ͥ ͥ̂ͣ̐́́͜͞
Z͑ͫ̓ͪ̂ͫ̽ ̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ ͫ͗ ͢ L̠ͨͧͩ͘ G̴̻͈͍͔̹ ̑͗̎̅͛ ́ Ǫ̵̹̻̝̳ ͂̌
̌͘! ͖̬̰̙̗ ̿̋ ͥ ͥ̂ͣ̐́́͜͞ => 143
͋ͳ͕ͨࢥ͏1จࣈ Ͳ͏͑Δ͖͔ʁ
byteͰ͑ΒΕͳ͍
Unicodeจࣈू߹ จࣈͱ͕ରԠ͢Δ
͋ => 3042
=> 1F914
͜ͷͷ͜ͱΛ ίʔυϙΠϯτ ͱݺͿ
͜ͷίʔυϙΠϯτΛ byteྻͰදݱ͢Δํ๏Λ ΤϯίʔσΟϯάͱ͍͏
UTF-8ͱ͔UTF-16ͱ͔ ΤϯίʔσΟϯάͷҰछ
ͱΓ͋͑ͣ ίʔυϙΠϯτΛ͑Ε ղܾʁ
͍͍͑
=> 1F468 + 200D + 1F469 + 200D + 1F466
࣮ෳͷίʔυϙΠϯτͰ ҰͭͷจࣈʹͳͬͨΓ͢Δ
ਓ͕ؒೝ͍ࣝͯ͠Δ̍จࣈ ॻهૉ(Grapheme cluster) ͱݺΕ͍ͯΔ
Ͳ͏Ε ίʔυϙΠϯτͷྻ͔Β ॻهૉΛऔΓग़ͤΔ͔
ίʔυϙΠϯτ͕ؒ ॻهૉڥքʹͳΔ͔Ͳ͏͔ͷ ݫີͳϧʔϧ͕͋Δ
UAX #29 Unicode Text Segmentation
None
͜ΕΛJSͰ࣮ͯ͠·ͨ͠ github.com/orisano/graphemesplit
ৄ͘͠ UAX #29 Λݟͯ http://unicode.org/reports/tr29/
ݟΒ͵ਓʹʓจࣈͱ ݴΘΕͨͱ͖ʹ ͪΌΜͱ֬ೝ͠Α͏ʂ
1 byte? 1 codepoint? 1 grapheme cluster?