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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
...cked by some query. For example, you may have executed "select for update" and have not yet committed/rollbacked and fired another select query. Do a commit/rollback before executing your query.
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Differences between TCP sockets and web sockets, one more time [duplicate]
Trying to understand as best as I can the differences between TCP socket and websocket, I've already found a lot of useful information within these questions:
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Intellisense and code suggestion not working in Visual Studio 2012 Ultimate RC
I have just downloaded and installed Visual Studio 2012 Ultimate RC, but I'm having an issue with the intellisense: it does not work until I press Ctrl + Space . Code suggestions are disabled also (method parameters for example).
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Does functional programming replace GoF design patterns?
Since I started learning F# and OCaml last year, I've read a huge number of articles which insist that design patterns (especially in Java) are workarounds for the missing features in imperative languages. One article I found makes a fairly strong claim :
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Is recursion a feature in and of itself?
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To answer your specific question: No, from the standpoint of learning a language, recursion isn't a feature. If your professor really docked you marks for using a "feature" he hadn't taught yet, that was wrong.
Reading between the lines, one possibility is that by using r...
Difference between == and ===
In swift there seem to be two equality operators: the double equals ( == ) and the triple equals ( === ), what is the difference between the two?
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What's is the difference between include and extend in use case diagram?
What is the difference between include and extend in a use case diagram ?
19 Answers
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If unit testing is so great, why aren't more companies doing it? [closed]
...icklers for it back then -- I have no idea what our code coverage was like and I was writing most of the unit tests. Since then I've run into some companies that do lots of testing, but it's chair testing: relies on a person being there, has low repeatibility and low chance of catching bugs. The oth...
Difference between FetchType LAZY and EAGER in Java Persistence API?
I am a newbie to Java Persistence API and Hibernate.
15 Answers
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What is @ModelAttribute in Spring MVC?
What is the purpose and usage of @ModelAttribute in Spring MVC?
13 Answers
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