大约有 47,000 项符合查询结果（耗时：0.0642秒） [XML]
Counting null and non-null values in a single query
...n this as a "run once query to spot how many nulls we have", I don't even know why ^^', going to correct, thanks.
– Alberto Zaccagni
Aug 13 '09 at 13:29
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Android Studio could not find any version that matches com.android.support:appcompat-v7:+
...ed invalidating cache and adding maven to build.gradle but nothing worked. Now just changed version 7:30.+ to 7:+ worked... Thanks a lot Osama yaccoub
– Jilson
Sep 17 at 9:48
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What's the difference between := and = in Makefile?
...me that CC = gcc then the appending operator is used like CC += -w
then CC now has the value gcc -W
For more check out these tutorials
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Can't find the 'libpq-fe.h header when trying to install pg gem
...PostgreSQL/9.1/include/"
gem install pg
After that, it works, because it now knows where to find the missing library. Just replace the path with the right location for your libpq-fe.h
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Can angularjs routes have optional parameter values?
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It looks like Angular has support for this now.
From the latest (v1.2.0) docs for $routeProvider.when(path, route):
path can contain optional named groups with a question mark (:name?)
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UITableView, Separator color where to set?
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Now you should be able to do it directly in the IB.
Not sure though, if this was available when the question was posted originally.
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How to filter by IP address in Wireshark?
...or display purpose only. its like you are interested in all trafic but for now you just want to see specific.
but if you are interested only in certian traffic and does not care about other at all then you use the capture filter.
The Syntax for display filter is (as mentioned earlier)
ip.addr = ...
How can I mix LaTeX in with Markdown? [closed]
...addplot3[
surf,
]
{exp(-x^2-y^2)*x};
\end{axis}
\end{tikzpicture}
And now, just a few words to terminate:
> Goodbye folks!
Which can be converted to LaTeX using commands like this: pandoc -s -i Hello.md -o Hello.tex
Following is an image of the converted Hello.md to Hello.pdf file using Mi...
Python locale error: unsupported locale setting
...to saving readonly files.
After saving the file do:
$ source ~/.bashrc
Now you wont be facing the same problem anymore.
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Django: Get an object form the DB, or 'None' if nothing matches
... = models.CharField(max_length=255)
objects = GetOrNoneManager()
And now I can do this:
bob_or_none = Person.objects.get_or_none(name='Bob')
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