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Is there a way to recover from an accidental “svn revert”?
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find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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Introducing FOREIGN KEY constraint may cause cycles or multiple cascade paths - why?
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从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...
...业，当时只有5个人，做一个宠物交易和服务的项目。
2015年1月，20出头的夏军迎来第一波人生高峰，他创办的爱狗团获得了天使轮投资。按照投资协议，对方出资1000万元，分5次给清，占股20%，项目估值5000万元。当时投资人已...
How to Detect if I'm Compiling Code with a particular Visual Studio version?
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_MSC_VER and possibly _MSC_FULL_VER is what you need. You can also examine visualc.hpp in any r...
Get user info via Google API
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Add this to the scope - https://www.googleapis.com/auth/userinfo.profile
And after authorizat...
How can I get column names from a table in SQL Server?
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You can obtain this information and much, much more by querying the Information Schema views.
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What is the difference between the dot (.) operator and -> in C++? [duplicate]
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