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How can I create a correlation matrix in R?
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How does a UILabel's minimumScaleFactor work?
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105
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Convert PDF to image with high resolution
I'm trying to use the command line program convert to take a PDF into an image (JPEG or PNG). Here is one of the PDFs that I'm trying to convert.
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How to create a static library with g++?
...Do I need to create the .o and the .a? I would also like to know how can I compile a static library in and use it in other .cpp code. I have header.cpp , header.hpp . I would like to create header.a . Test the header.a in test.cpp . I am using g++ for compiling.
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No module named setuptools
I want to install setup file of twilio. When I install it through given command it is given me an error:
5 Answers
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how do you filter pandas dataframes by multiple columns
...ke you could answer it. Relates to pandas dataframes again. stackoverflow.com/questions/22086619/…
– yoshiserry
Feb 28 '14 at 5:26
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How to validate an email address in PHP
...:1[0-9]{2})|(?:[1-9]?[0-9]))){3}))\\]))$/iD';
$emailaddress = 'test@gmail.com';
if (preg_match($pattern, $emailaddress) === 1) {
// emailaddress is valid
}
P.S. A note on the regex pattern used above (from the PHP source). It looks like there is some copyright on it of Michael Rushton. As st...
What is the at sign (@) in a batch file and what does it do?
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At symbol - @
The @ symbol tells the command processor to be less verbose; to only show the output of the command without showing it being executed or any prompts associated with the execution. When used it is prepended to the beginning of the command, it is not...
How to add a local repo and treat it as a remote repo
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You have your arguments to the remote add command reversed:
git remote add <NAME> <PATH>
So:
git remote add bak /home/sas/dev/apps/smx/repo/bak/ontologybackend/.git
See git remote --help for more information.
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Difference between filter and filter_by in SQLAlchemy
...ng regular kwargs, like
db.users.filter_by(name='Joe')
The same can be accomplished with filter, not using kwargs, but instead using the '==' equality operator, which has been overloaded on the db.users.name object:
db.users.filter(db.users.name=='Joe')
You can also write more powerful queries u...