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![これ知らないプログラマって損してんなって思う汎用的なツール](https://cdn-ak-scissors.b.st-hatena.com/image/square/8b088fb69a0d561174ebe98940da6f0c204ab187/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-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%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBwdXJpa2V0dTk5JnR4dC1jb2xvcj0lMjMxRTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz1hNDU2ZDQ2M2Q1ZGRhZjQ2YTk0OWIzMjkwMGM1ZTdiZA%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3D9552829ae377f0a537f5207778e412c3)
Effective Scala Marius Eriksen, Twitter Inc. marius@twitter.com (@marius) Table of Contents Introduction Formatting: Whitespace, Naming, Imports, Braces, Pattern matching, Comments Types and Generics: Return type annotations, Variance, Type aliases, Implicits Collections: Hierarchy, Use, Style, Performance, Java Collections Concurrency: Futures, Collections Control structures: Recursion, Returns,
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