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how to use sed, awk, or gawk to print only what is matched?
...xyz.*$/\1/p' example.txt
For matching at least one numeric character without +, I would use:
sed -n 's/^.*abc\([0-9][0-9]*\)xyz.*$/\1/p' example.txt
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Changing default encoding of Python?
...though ("Changing default encoding of Python?"). Do you have a reference about the effect of the environment variable LC_CTYPE on the Python interpreter?
– Eric O Lebigot
Aug 10 '15 at 0:16
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SQL Server database backup restore on lower version
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@Gaurav Don't script out the data - instead, script out the entire database (tables, procs, triggers, constraints, etc) without data, create the new database, then right click the source database, go to "Tools", then "Export Data" to transfer the...
How do I delete multiple rows in Entity Framework (without foreach)
...tly what we need... Except when I use it on a large enough range, I get an out-of-memory exception! I thought the whole point of RemoveRange was to pass the processing to the database, but apparently not.
– Samer Adra
Apr 22 '14 at 13:53
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Extracting text OpenCV
...gle(img1,letterBBoxes1[i],cv::Scalar(0,255,0),3,8,0);
cv::imwrite( "imgOut1.jpg", img1);
for(int i=0; i< letterBBoxes2.size(); i++)
cv::rectangle(img2,letterBBoxes2[i],cv::Scalar(0,255,0),3,8,0);
cv::imwrite( "imgOut2.jpg", img2);
return 0;
}
Results:
a. element = g...
Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
... foreach loop is syntactic sugar for iterating. However as you pointed out, you need to call remove on the iterator - which foreach doesn't give you access to. Hence the reason why you can't remove in a foreach loop (even though you are actually using an iterator under the hood)
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Detect if Android device has Internet connection
....setRequestProperty("Connection", "close");
urlc.setConnectTimeout(1500);
urlc.connect();
return (urlc.getResponseCode() == 200);
} catch (IOException e) {
Log.e(LOG_TAG, "Error checking internet connection", e);
}
} else {
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Using port number in Windows host file
... port to choose.
So use bookmarks or something like that.
(Some firewall/routing software might allow outbound port redirection, but that doesn't really sound like an appealing option for this.)
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Restoring MySQL database from physical files
... mysql:mysql . on the mysql data directory is quick and easy, but figuring out, before that, why all my resoterd DBs seemed to have no tables took a bit longer.
– Edurne Pascual
Sep 26 '12 at 15:41
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Skip callbacks on Factory Girl and Rspec
...eate) { |user| user.send(:run_something) }
end
end
end
Running without callback:
FactoryGirl.create(:user)
Running with callback:
FactoryGirl.create(:user_with_run_something)
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im...