大约有 42,000 项符合查询结果（耗时：0.0554秒） [XML]
Foreign Key to non-primary key
I have a table which holds data, and one of those rows needs to exist in another table. So, I want a foreign key to maintain referential integrity.
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Meaning of $? (dollar question mark) in shell scripts
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This is the exit status of the last executed command.
For example the command true always returns a status of 0 and false always returns a status of 1:
true
echo $? # echoes 0
false
echo $? # echoes 1
From the manual: (acessible by calling man bash in your shell)
$?...
How do I center text horizontally and vertically in a TextView?
How do I center the text horizontally and vertically in a TextView , so that it appears exactly in the middle of the TextView in Android ?
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Describe the architecture you use for Java web applications? [closed]
...pring
DAO's : Ibatis
Database : Oracle
We use Sping transaction support, and start transactions upon entering the service layer, propagating down to the DAO call's. The Service layer has the most bussines model knowledge, and the DAO's do relatively simple CRUD work.
Some more complicated query s...
Similarity String Comparison in Java
I want to compare several strings to each other, and find the ones that are the most similar. I was wondering if there is any library, method or best practice that would return me which strings are more similar to other strings. For example:
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PermGen elimination in JDK 8
I have installed JDK 8 and trying to run Eclipse. I am getting following warning message:
6 Answers
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Extract filename and extension in Bash
I want to get the filename (without extension) and the extension separately.
37 Answers
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facebook: permanent Page Access Token?
...ret}&fb_exchange_token={short_lived_token}
entering in your app's ID and secret and the short-lived token generated in the previous step.
You cannot use the Graph API Explorer. For some reason it gets stuck on this request. I think it's because the response isn't JSON, but a query string. Sin...
WebApi's {“message”:“an error has occurred”} on IIS7, not in IIS Express
I'm working with ASP.NET MVC 4 WebApi and am having a lot of fun with it running it on my local computer on IIS Express. I've configured IIS Express to serve remote machines too, and so other's in my company are using my computer as our webserver.
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Is there a good reason to use upper case for SQL keywords? [closed]
...owercase with database object names MixedCase.
It is much easier to read, and literals and comments stand out.
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