回答編集履歴
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WithLatestFromオペレータが使えると思います。
test
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【回答編集しました。】
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最新の値をペアで取得する場合は、WithLatestFromオペレータを使うと良いと思います。
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```c#
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var r = new Random();
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var sensor = Observable.Interval( TimeSpan.FromSeconds( 1 ) )
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Id = x ,
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Timestamp = DateTime.Now
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Timestamp = DateTime.Now ,
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Key = r.Next() % 2 == 0 ? 'A' : 'B'
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} )
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.Do( x => Console.WriteLine( $"
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.Do( x => Console.WriteLine( $"DEBUG {x.Key}-{x.Id}->{x.Timestamp}" ) )
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.Publish()
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.RefCount();
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@@ -26,13 +40,33 @@
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sensor
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.
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.Where( x => x.Key == 'A' )
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.WithLatestFrom(
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sensor.Where( x => x.Key == 'B' ) ,
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( a , b ) => new
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{
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A = a ,
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B = b
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}
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)
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.Sample( TimeSpan.FromSeconds( 3 ) )
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.Subscribe( x => Console.WriteLine( $"e
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.Subscribe( x => Console.WriteLine( $"{x.A.Key}:ID={x.A.Id}->{x.A.Timestamp} {x.B.Key}:{x.B.Id}->{x.B.Timestamp}" ) );
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```
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WithLatestFromオペレータは、それぞれのシーケンスの最新の値を合成します。
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Sampleオペレータは、値をサンプリングし続け、一定間隔毎に最新の値を後続に流すオペレータです。
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//--- 実行結果 ---//
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DEBUG B-2->2016/05/14 17:47:18
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DEBUG B-3->2016/05/14 17:47:19
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DEBUG A-4->2016/05/14 17:47:20
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DEBUG B-5->2016/05/14 17:47:21
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A:ID=4->2016/05/14 17:47:20 B:3->2016/05/14 17:47:19
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DEBUG A-6->2016/05/14 17:47:22
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DEBUG B-7->2016/05/14 17:47:23
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DEBUG A-8->2016/05/14 17:47:24
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A:ID=6->2016/05/14 17:47:22 B:5->2016/05/14 17:47:21
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DEBUG B-9->2016/05/14 17:47:25
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DEBUG B-10->2016/05/14 17:47:26
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A:ID=8->2016/05/14 17:47:24 B:7->2016/05/14 17:47:23
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DEBUG A-11->2016/05/14 17:47:27
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sensor:0 - 2016/05/13 21:41:22
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sensor:1 - 2016/05/13 21:41:23
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sensor:2 - 2016/05/13 21:41:24
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event:2 - 2016/05/13 21:41:24
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sensor:3 - 2016/05/13 21:41:25
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sensor:4 - 2016/05/13 21:41:26
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event:4 - 2016/05/13 21:41:26
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sensor:5 - 2016/05/13 21:41:27
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sensor:6 - 2016/05/13 21:41:28
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sensor:7 - 2016/05/13 21:41:29
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sensor:8 - 2016/05/13 21:41:30
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event:7 - 2016/05/13 21:41:29
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sensor:9 - 2016/05/13 21:41:31
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