開発環境
- macOS Mojave - Apple (OS)
- Safari(Web browser)
- Emacs (Text Editor)
- Windows 10 Pro (OS)
- Visual Studio Code (Text Editor)
- JavaScript(プログラミング言語)
- JavaScriptリファレンス 第6版 (楽天ブックス(Kobo)、Yahoo!) (参考書籍)
このプログラマは10分で終わる作業を1秒以内に終わらせるために20分の時間をかけたようです pic.twitter.com/VcRYO306Zd
— ミドリムシ+ (@Euglenese) 2018年12月29日
実行速度より作業の速さで、コードの読みやすさと短さ、そして最新のJavaScript(ECMAScript)っぽさ(let、filter、テンプレート文字列を利用)を重視したコードに書き直してみた。
コード(Emacs)
HTML5
<script src="sample83.js"></script>
JavaScript(ECMAScript)
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B","EndTime":"2018-10-14T23:00:00+09:00"},{"IsRated":true,"Place":99,"NewRating":2123,"Performance":2327,"InnerPerformance":2327,"ContestScreenName":"tenka1-2018.contest.atcoder.jp","ContestName":"Tenka1 Programmer Contest","EndTime":"2018-10-27T22:40:00+09:00"},{"IsRated":false,"Place":68,"NewRating":2123,"Performance":0,"InnerPerformance":0,"ContestScreenName":"abc113.contest.atcoder.jp","ContestName":"AtCoder Beginner Contest 113","EndTime":"2018-11-04T22:40:00+09:00"},{"IsRated":false,"Place":95,"NewRating":2123,"Performance":0,"InnerPerformance":0,"ContestScreenName":"ddcc2019-qual.contest.atcoder.jp","ContestName":"DISCO presents ディスカバリーチャンネル コードコンテスト2019 予選","EndTime":"2018-11-23T22:30:00+09:00"},{"IsRated":true,"Place":69,"NewRating":2168,"Performance":2503,"InnerPerformance":2503,"ContestScreenName":"dwacon5th-prelims.contest.atcoder.jp","ContestName":"Dwango Programming Contest V / 第5回 ドワンゴからの挑戦状 予選","EndTime":"2018-11-24T22:00:00+09:00"},{"IsRated":false,"Place":10,"NewRating":2168,"Performance":0,"InnerPerformance":0,"ContestScreenName":"code-thanks-festival-2018-open.contest.atcoder.jp","ContestName":"CODE THANKS FESTIVAL 2018(Parallel)","EndTime":"2018-11-25T15:00:00+09:00"},{"IsRated":false,"Place":14,"NewRating":2168,"Performance":0,"InnerPerformance":0,"ContestScreenName":"abc114.contest.atcoder.jp","ContestName":"AtCoder Beginner Contest 114","EndTime":"2018-12-02T22:40:00+09:00"},{"IsRated":false,"Place":17,"NewRating":2168,"Performance":0,"InnerPerformance":0,"ContestScreenName":"abc115.contest.atcoder.jp","ContestName":"AtCoder Beginner Contest 115","EndTime":"2018-12-08T22:50:00+09:00"},{"IsRated":true,"Place":382,"NewRating":2144,"Performance":1909,"InnerPerformance":1909,"ContestScreenName":"agc029.contest.atcoder.jp","ContestName":"AtCoder Grand Contest 029","EndTime":"2018-12-15T23:20:00+09:00"},{"IsRated":true,"Place":232,"NewRating":2124,"Performance":1922,"InnerPerformance":1922,"ContestScreenName":"caddi2018.contest.atcoder.jp","ContestName":"CADDi 2018","EndTime":"2018-12-22T23:00:00+09:00"},{"IsRated":true,"Place":250,"NewRating":2123,"Performance":2118,"InnerPerformance":2118,"ContestScreenName":"agc030.contest.atcoder.jp","ContestName":"AtCoder Grand Contest 030","EndTime":"2018-12-29T22:50:00+09:00"}]', now = JSON.parse(txt).filter(x => x.EndTime > '2018'), contest = now.length, rated = now.filter(n => n.IsRated === true).length; console.log(`コンテストの参加回数 : ${contest}`); console.log(`rated参加回数 : ${rated}`);
入出力結果(Console)
コンテストの参加回数 : 59 rated参加回数 : 31
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