Scala vs Ruby - Speaker Deck

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Scala vs Ruby 2015-06-25 ୈ2ճSpeeeTechParty LT ੢Ԭ׮݉ @nisshieeorg

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ࣗݾ঺հ • ੢Ԭ׮݉ʢʹ͓͔͠ ͻΖ͔ͣʣ • @nisshieeorg • ޷͖ͳݴޠɿScala • Scalaྺɿ4೥ • Ruby(Rails)ྺɿ1ϲ݄൒

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ScalaͱRubyΛൺֱͯ͠ΈΔ RubyΛॻ͘͜ͱʹͳͬͨͷͰɾɾɾ

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΋ͪΖΜؔ਺ܕͱOOPͷҧ͍ ͱ͔͸͋ΔΜ͚ͩͲɺ Ұ൪ҧͬͨͷ͸ɾɾɾ

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҆৺ײͷ࡞Γํͷҧ͍ • Scala͸ʮίϯύΠϧ͕௨Ε͹͍͍ͩͨ߹ͬͯΔʯͱ ͍͏҆৺ײ ➡ ίϯύΠϧ͸ςετ ➡ ੩తܕ෇͚ؔ਺ܕݴޠͷύϫʔ • Ruby͸ςετͰ҆৺ײΛ࡞Δ ➡ ѹ౗తʹςετ͕ॻ͖΍͍͢ ➡ ಈతܕ෇͚+ΦʔϓϯΫϥεͷύϫʔ

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def fizzbuzz(i: Int): String = (i % 3, i % 5) match { case (0, 0) => "FizzBuzz" case (0, _) => "Fizz" case (_, 0) => "Buzz" case _ => i.toString } // ίϯύΠϧOK ! def fizzbuzz(i: Int): String = (i % 3, i % 5) match { case (0, _) => "Fizz" case (_, 0) => "Buzz" case (0, 0) => "FizzBuzz" case _ => i.toString } [error] /src/main/scala/App.scala:5: unreachable code [error] case (0, 0) => "FizzBuzz" ScalaͷίϯύΠϧ࣌νΣοΫೳྗʢҰྫʣ ※ "-Xfatal-warnings"ίϯύΠϥΦϓγϣϯ࢖༻

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ScalaͱRubyͬͯ݁ߏࣅͯΔ ʢҙ֎ʂʣ

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OSSίϛϡχςΟ͕׆ൃ • ͳͷͰɺόʔδϣϯ໰୊͕ى͖Δ͆ • ґଘͷґଘͷόʔδϣϯࠩͰࢮ͵

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ΞυϗοΫͳػೳ௥Ճ • Ұੲલ͸ΦʔϓϯΫϥε(Ruby)ͷಛݖͩͬͨ • Scala΋Ͱ͖ΔΑʂ → ܕΫϥε (+ ϚΫϩ) • ϥΠϒϥϦͷػೳ͕ίʔυʹγʔϜϨεʹ༥ ߹͢Δ • ϦϑΝϨϯε͕ݟ೉͍͆