2018年12月30日日曜日


JavaScript 第6版
原著
楽天ブックス(Kobo) Yahoo!

開発環境

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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A","EndTime":"2017-09-23T23:00:00+09:00"},{"IsRated":true,"Place":40,"NewRating":664,"Performance":1600,"InnerPerformance":1891,"ContestScreenName":"tenka1-2017-beginner.contest.atcoder.jp","ContestName":"Tenka1 Programmer Beginner Contest","EndTime":"2017-09-30T22:40:00+09:00"},{"IsRated":false,"Place":411,"NewRating":664,"Performance":0,"InnerPerformance":0,"ContestScreenName":"ddcc2017-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2017 予選","EndTime":"2017-10-07T22:30:00+09:00"},{"IsRated":true,"Place":529,"NewRating":883,"Performance":1625,"InnerPerformance":1625,"ContestScreenName":"code-festival-2017-qualb.contest.atcoder.jp","ContestName":"CODE FESTIVAL 2017 qual B","EndTime":"2017-10-08T23:00:00+09:00"},{"IsRated":true,"Place":230,"NewRating":1018,"Performance":1580,"InnerPerformance":1580,"ContestScreenName":"abc075.contest.atcoder.jp","ContestName":"AtCoder Beginner Contest 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Programming Contest 2018 -Masters Tournament-","EndTime":"2018-07-07T23:00:00+09:00"},{"IsRated":true,"Place":115,"NewRating":2091,"Performance":2564,"InnerPerformance":2564,"ContestScreenName":"agc026.contest.atcoder.jp","ContestName":"AtCoder Grand Contest 026","EndTime":"2018-07-14T23:30:00+09:00"},{"IsRated":false,"Place":32,"NewRating":2091,"Performance":0,"InnerPerformance":0,"ContestScreenName":"abc103.contest.atcoder.jp","ContestName":"AtCoder Beginner Contest 103","EndTime":"2018-07-21T22:40:00+09:00"},{"IsRated":false,"Place":60,"NewRating":2091,"Performance":0,"InnerPerformance":0,"ContestScreenName":"soundhound2018-summer-final-open.contest.atcoder.jp","ContestName":"SoundHound Programming Contest 2018 Masters Tournament 本戦 (Open)","EndTime":"2018-07-28T17:00:00+09:00"},{"IsRated":false,"Place":163,"NewRating":2091,"Performance":0,"InnerPerformance":0,"ContestScreenName":"mujin-pc-2018.contest.atcoder.jp","ContestName":"Mujin Programming Challenge 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A","EndTime":"2018-09-22T23:00:00+09:00"},{"IsRated":true,"Place":159,"NewRating":2126,"Performance":2174,"InnerPerformance":2174,"ContestScreenName":"arc103.contest.atcoder.jp","ContestName":"AtCoder Regular Contest 103","EndTime":"2018-09-29T22:40:00+09:00"},{"IsRated":false,"Place":2,"NewRating":2126,"Performance":0,"InnerPerformance":0,"ContestScreenName":"abc112.contest.atcoder.jp","ContestName":"AtCoder Beginner Contest 112","EndTime":"2018-10-06T22:40:00+09:00"},{"IsRated":true,"Place":408,"NewRating":2098,"Performance":1808,"InnerPerformance":1808,"ContestScreenName":"agc028.contest.atcoder.jp","ContestName":"AtCoder Grand Contest 028","EndTime":"2018-10-13T23:30:00+09:00"},{"IsRated":false,"Place":44,"NewRating":2098,"Performance":0,"InnerPerformance":0,"ContestScreenName":"code-festival-2018-qualb.contest.atcoder.jp","ContestName":"CODE FESTIVAL 2018 qual 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
時刻: 12:00 ラベル: ,

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