大约有 1,180 项符合查询结果(耗时:0.0170秒) [XML]

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Why isn't SQL ANSI-92 standard better adopted over ANSI-89?

... I also try to evangelize the SQL-92 syntax. Sixteen years after it was approved, it's about time people start using it! And all brands of SQL database now support it, so there's no reason to continue to use the nonstandard (+) Oracle syntax or *= Microsoft/Sybase syntax. As for why it's so hard ...
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Code First: Independent associations vs. Foreign key associations?

I have a mental debate with myself every time I start working on a new project and I am designing my POCOs. I have seen many tutorials/code samples that seem to favor foreign key associations : ...
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Why should I use tags vs. release/beta branches for versioning?

... Tags are mainly used for future reference to the specific version of the project, by tagging a commit. You can always use branches of course, but if you change versions a lot, you will end up with lots of unused or rarely used branches. Practically, tags are branches without branches anyway, just...
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static const vs #define

Is it better to use static const vars than #define preprocessor? Or maybe it depends on the context? 11 Answers ...
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Why is extending native objects a bad practice?

...w a class works without subclassing it is an important feature of any good programming language, but it is one that must be used rarely and with caution. share | improve this answer | ...
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What exactly is Spring Framework for? [closed]

...ction which is a pattern that allows building very decoupled systems. The problem For example, suppose you need to list the users of the system and thus declare an interface called UserLister: public interface UserLister { List<User> getUsers(); } And maybe an implementation accessing...
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How do I specify multiple targets in my podfile for my Xcode project?

I'm using CocoaPods with my Xcode 4 project and I have three targets for my project (the default, one for building a lite version and one for building a demo version). All the targets use the same libraries, but CocoaPods is only adding the static library and search paths to the primary target. My p...
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Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?

...2&lastname:john As you can see, firstname field is boosted up with a score of 2. More on SolrRelevancy searching and indexing speed The speed is unbelievably fast and no compromise on that. The reason I moved to Solr. Regarding the indexing speed, Solr can also handle JOINS from ...
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Why is the JVM stack-based and the Dalvik VM register-based?

...ng the code over a slow network link. Going with a register-based scheme probably means that Dalvik's code generator doesn't have to work as hard to produce performant code. Running on an extremely register-rich or register-poor architecture would probably handicap Dalvik, but that's not the usual...
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Is explicitly closing files important?

...he file but not using try - finally or the " with " statement, is this a problem? Or does it suffice as a coding practice to rely on the Python garbage-collection to close all files? For example, if one does this: ...