大约有 41,000 项符合查询结果(耗时:0.0478秒) [XML]

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Why is spawning threads in Java EE container discouraged?

...aged because all resources within the environment are meant to be managed, and potentially monitored, by the server. Also, much of the context in which a thread is being used is typically attached to the thread of execution itself. If you simply start your own thread (which I believe some servers ...
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Difference between the Facade, Proxy, Adapter and Decorator design patterns? [closed]

What is the difference between the Facade, Proxy, Adapter, and Decorator design patterns? 2 Answers ...
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Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT

I am fairly new to MySQL and I am getting a pretty interesting error on which I cannot find any help via google and the stackoverflow search. ...
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Is there Unicode glyph Symbol to represent “Search” [closed]

... There is U+1F50D LEFT-POINTING MAGNIFYING GLASS (????) and U+1F50E RIGHT-POINTING MAGNIFYING GLASS (????). You should use (in HTML) 🔍 or 🔎 They are, however not supported by many fonts (fileformat.info only lists a few fonts as supporting the Codepoint w...
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Difference between a theta join, equijoin and natural join

I'm having trouble understanding relational algebra when it comes to theta joins, equijoins and natural joins. Could someone please help me better understand it? If I use the = sign on a theta join is it exactly the same as just using a natural join? ...
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Apache Spark: The number of cores vs. the number of executors

I'm trying to understand the relationship of the number of cores and the number of executors when running a Spark job on YARN. ...
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Why doesn't String switch statement support a null case?

...wondering why the Java 7 switch statement does not support a null case and instead throws NullPointerException ? See the commented line below (example taken from the Java Tutorials article on switch ): ...
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How do I execute a stored procedure once for each row returned by query?

...stored procedure that alters user data in a certain way. I pass it user_id and it does it's thing. I want to run a query on a table and then for each user_id I find run the stored procedure once on that user_id ...
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LLVM C++ IDE for Windows

... some C/C++ IDE for Windows, which is integrated with the LLVM compiler (and Clang C/C++ analyzer), just like modern Xcode do. ...
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Best documentation for Boost:asio?

... First, I've been using Boost.Asio for quite a while already -- and I share your concern. To address your question: There really is very scarce documentation about Boost.Asio aside from the introduction and tutorial. I am not the author, but this is mostly because there are just too man...