2月13日，a股开盘涨跌互现，早盘开盘后两市震荡上行，但科技创新板走势低迷。午后两市涨幅略有扩大。截至开发者_开发技巧收盘，上证综指涨0.72%，科创50指数跌0.05%，深证成指涨1.14%，创业板指涨1.1%。
I have various ObservableC开发者_高级运维ollections of different object types.I\'d like to write a single method that will take a collection of any of these object types and return a new collection wh
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