大约有 46,000 项符合查询结果（耗时：0.0697秒） [XML]
LEFT JOIN only first row
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edited Mar 25 '13 at 23:16
answered Mar 25 '13 at 23:10
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Generate a random number in the range 1 - 10
...bers between 1 and 10 you mean any float that is >= 1 and < 10, then it's easy:
select random() * 9 + 1
This can be easily tested with:
# select min(i), max(i) from (
select random() * 9 + 1 as i from generate_series(1,1000000)
) q;
min | max
-----------------+------...
How to change the remote repository for a git submodule?
I've created a git repository with a submodule in it. I'm able to tell the submodule itself to change its remote repository path, but I'm not sure how to tell the parent repository how to change the remote repository path for the submodule.
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How to build an android library with Android Studio and gradle?
...is in IntelliJ on a regular basis but I don't know how the integration is with Android Studio. I am a believer in knowing what is going on for me, so this is how I use Gradle and Android.
TL;DR Full Example - https://github.com/ethankhall/driving-time-tracker/
Disclaimer: This is a project I am/w...
Download and open PDF file using Ajax
...ax for this. Just an <a> link is enough if you set the content-disposition to attachment in the server side code. This way the parent page will just stay open, if that was your major concern (why would you unnecessarily have chosen Ajax for this otherwise?). Besides, there is no way to handle ...
Optimise PostgreSQL for fast testing
I am switching to PostgreSQL from SQLite for a typical Rails application.
2 Answers
2
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What's the difference between a mock & stub?
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Stub
I believe the biggest distinction is that a stub you have already written with predetermined behavior. So you would have a class that implements the dependency (abstract class or interface most likely) you are faking for testing purposes and the methods would just be stubbed out with set resp...
Rspec doesn't see my model Class. uninitialized constant error
I'm writing tests on Rspec for my models in Ruby on Rails application.
And I receive this error while starting 'rspec spec'
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How to remove extension from string (only real extension!)
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Try this one:
$withoutExt = preg_replace('/\\.[^.\\s]{3,4}$/', '', $filename);
So, this matches a dot followed by three or four characters which are not a dot or a space. The "3 or 4" rule should probably be relaxed, since there are plenty...
How to center a checkbox in a table cell?
The cell contains nothing but a checkbox. It is rather wide because of text in the table header row. How do I center the checkbox (with inline CSS in my HTML? (I know))
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