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Where連打ã—ã¦ã„ã¾ã™ã‹ï¼Ÿãã‚Œã¨ã‚‚パフォーマンスã®æ‚ªåŒ–を心é…ã—ã¦&&連çµã«ã—ã¦ã„ã¾ã™ã‹ï¼ŸLINQã®ä»•çµ„ã¿ï¼†é…延評価ã®æ£ã—ã„åŸºç¤ŽçŸ¥è˜ ï¼ ï¼ ITã§ã¯Where+Selectã«å¯¾ã—㦠「WhereSelectEnumerableIteratorã€ã¨ãªã£ã¦ã„ã¦ã€åå‰ã®ã¨ãŠã‚Šã€Whereã¨SelectãŒçµ±åˆã•ã‚Œã¦ã„ã‚‹ã“ã¨ã§ã™ã€‚ã“ã‚Œã¯ã€ã€ŒWhereã€->「Selectã€ãŒé »å‡ºãƒ‘ターンãªã®ã§ã€ãれらを統åˆã™ã‚‹ã“ã¨ã§ãƒ‘フォーマンスをå‘上ã•ã›ã‚‹ãŸã‚ã§ã—ょã†ã€‚ ã¨æ›¸ãã¾ã—ãŸãŒã€ã§ã¯é€£æ‰“ã®å ´åˆã¯ã©ã†ãªã£ã¦ã„ã‚‹ã§ã—ょã†ã‹ã€‚見ã¦ã¿ã¾ã—ょã†ã€‚ var seq1 = Enumerable.Range(1, 10) .Where(x => x % 2 == 0) .Where(x => x % 3 == 0); // ã©ã†ã§ã‚‚ã„ã„ã‚“ã§ã™ãŒã€ã“ã‚Œã¯Visual Studio 11 Betaã§ã™ã€‚VS11最高ã§ã™ã‚ˆï¼ @
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History & Practices for UniRx UniRxã®æ´å²ã€æˆ–ã„ã¯é–‹ç™º(ä¸)タイトルã®ç”¨ä¾‹ã¨è½ã¨ã—ç©´ã®å›žé¿æ³•
IronRuby and the Reactive Extensions for .NET Together at Last | Matthew Podwysocki
IronRuby and the Reactive Extensions for .NET Together at Last Recently, there was a release of IronRuby 1.1, which had a number of new features including targeting .NET 4 only, as well as the most interesting part, the support for Extension Methods. Taking a cue from the examples, we can write a simple LINQ comprehension using extension methods defined in the System.Core library’s System.Linq na
ヒマをã¿ã¤ã‘ã¦Web開発 | Cassandraã®LINQProvider作ã£ãŸã‚ˆï¼ˆï¿£âˆ‡ ï¿£ ）
今をã¨ãã‚ãCassandraã®ã€LINQプãƒãƒã‚¤ãƒ€ã‚’作ã£ã¦ã¿ã¾ã—ãŸï¼ˆï¿£âˆ‡ ï¿£ ） Cassandraemon in CodePlex Cassandraemon ã“ã‚“ãªæ„Ÿã˜ã§ã€ãƒ‡ãƒ¼ã‚¿ã‚’å–ã£ã¦ã“ã‚Œã¾ã™ã€‚ public class Product { public int ID { get; set; } public string Name { get; set; } } using(var context = new CassandraContext("localhost", 9160, "KeySpace1")) { var products = from x in context.ColumnList where x.Key == "1" && x.ColumnFamily == "Product" select x.ToObject<product>(); foreach(var
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GitHub - DbLinq/dblinq2007: LINQ provider for Oracle, PostgreSQL, MySQL, Ingres, SQLite, Firebird and ... SQL Server
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