はてなブックマーク

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# ---------------------------------------------- # # Expressions # ---------------------------------------------- # # 評価に関しての注意 # ---------------------------- # post = "my post" # **BAD**# if post != nil puts post end # **GOOD**# 省略できる if post puts post end # 下記はTRUEなので注意 # "" -> TRUE # 0 -> TRUE # [] -> TRUE post = "" puts "#{post}(empty but true)" if post # 例（これは意図した通りに動かない） # name.length -> 0でも

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