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2018/05/08 Otemachi.rb#6 RubyProject Eular Shu OGAWARA (@expajp)
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+-$ n ( '(@expajp) – 3 – Ruby/Rails*1 – &% – #) !" – .%,
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Project Eular
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Project Eular https://projecteuler.net/
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Project EularRuby n 1978/- 6: – 78/2,6+1.8000+ n %' – ('$8;< – 45# /% &#&'7 – Write Code Everyday " – )*&! 6 03
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n Project Eular n – Ruby
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n Project EularRuby,$' "#! & – 30/.0 - – 1 n (+Project Eular)* %1),
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n
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n – String#each_char • 1 – Enumerable#inject •
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n 100 % ( # – Enumerable#combination(n) • &) n' ( " – Prime.instance.prime? (prime$ ) • ( !
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n Problem 4 !" $% & # ! . 2' " ! , 9009 = 91 99 . , 3' " ! # .
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n Project Eular *) $ /F +"- n Ruby,-(!3. – Enumerable&'*: – ,-(! ; ? 48 – RubyA5=2796 • E<% DC n Rails # BG@0>1