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Set opacity of background image without affecting child elements
... your image into an image editor, turn down the opacity, save it as a .png and use that instead.
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In Perl, how can I read an entire file into a string?
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Add:
local $/;
before reading from the file handle. See How can I read in an entire file all at once?, or
$ perldoc -q "entire file"
See Variables related to filehandles in perldoc perlvar and perldoc -f local.
Incidentally, if you can put your script on the server,...
constant pointer vs pointer on a constant value [duplicate]
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char * const a;
means that the pointer is constant and immutable but the pointed data is not.
You could use const_cast(in C++) or c-style cast to cast away the constness in this case as data itself is not constant.
const char * a;
means that the pointed data cannot be writ...
nvm keeps “forgetting” node in new terminal session
... Isn't this already the job of nvm use? After $ nvm alias default 0.11.13 and $ nvm use 0.11.12, I get node --version = 0.11.12. Still, in a new session, node is gone again. In debian, I don't have this issue at all.
– frhd
Jul 5 '14 at 17:04
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Regular expression to extract text between square brackets
...ollowing regex globally:
\[(.*?)\]
Explanation:
\[ : [ is a meta char and needs to be escaped if you want to match it literally.
(.*?) : match everything in a non-greedy way and capture it.
\] : ] is a meta char and needs to be escaped if you want to match it literally.
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How to use MySQLdb with Python and Django in OSX 10.6?
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I had the same error and pip install MySQL-python solved it for me.
Alternate installs:
If you don't have pip, easy_install MySQL-python should work.
If your python is managed by a packaging system, you might have to use
that system (e.g. sudo...
How do I sort an observable collection?
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Sorting an observable and returning the same object sorted can be done using an extension method. For larger collections watch out for the number of collection changed notifications.
I have updated my code to improve performance (thanks to nawfal)...
Error in Swift class: Property not initialized at super.init call
I have two classes, Shape and Square
12 Answers
12
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How do I strip non alphanumeric characters from a string and keep spaces?
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Just to precise, this remove all accented letters and may not be adapted to some languages.
– Uelb
Nov 25 '15 at 16:25
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How do I find the location of my Python site-packages directory?
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There are two types of site-packages directories, global and per user.
Global site-packages ("dist-packages") directories are listed in sys.path when you run:
python -m site
For a more concise list run getsitepackages from the site module in Python code:
python -c 'import sit...