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Choosing between qplot() and ggplot() in ggplot2 [closed]
I'm starting to use the great ggplot2 package for plotting in R, and one of the first things I ask myself before each plot is "well, will I use qplot or ggplot ?"
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How do I check if an HTML element is empty using jQuery?
...d, the browser interpretation of an empty element can vary. If you would like to ignore invisible elements such as spaces and line breaks and make the implementation more consistent you can create a function (or just use the code inside of it).
function isEmpty( el ){
return !$.trim(el.html...
How do I copy folder with files to another folder in Unix/Linux? [closed]
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The option you're looking for is -R.
cp -R path_to_source path_to_destination/
If destination doesn't exist, it will be created.
-R means copy directories recursively. You can also use -r since it's case-insensitive.
Note the nuances with add...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...f you want zeros instead of not selecting, then a CASE statement should work:
SELECT CASE WHEN myfield~E'^\\d+$' THEN myfield::integer ELSE 0 END FROM mytable;
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Does Python have a package/module management system?
Does Python have a package/module management system, similar to how Ruby has rubygems where you can do gem install packagename ?
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Simplest way to profile a PHP script
... edited Oct 16 '18 at 21:59
YakovL
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answered Aug 21 '08 at 21:04
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How can I use jQuery in Greasemonkey scripts in Google Chrome?
As some of you may know, Google Chrome has put some severe limitation on Greasemonkey scripts.
11 Answers
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I can't install python-ldap
...eaders) in order to compile the Python module. If you're on Ubuntu, the package is called libldap2-dev.
Debian/Ubuntu:
sudo apt-get install libsasl2-dev python-dev libldap2-dev libssl-dev
RedHat/CentOS:
sudo yum install python-devel openldap-devel
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Get the value of checked checkbox?
So I've got code that looks like this:
11 Answers
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How to retrieve a single file from a specific revision in Git?
I have a Git repository and I'd like to see how some files looked a few months ago. I found the revision at that date; it's 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8 . I need to see what one file looks like, and also save it as a ("new") file.
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