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How to use the PI constant in C++
...acro
* definitions for common math constants. These are placed under an #ifdef
* since these commonly-defined names are not part of the C/C++ standards.
*/
However:
on newer platforms (at least on my 64 bit Ubuntu 14.04) I do not need to define the _USE_MATH_DEFINES
On (recent) Linux platfo...
How can I get all the request headers in Django?
...A is a "standard Python dictionary containing all available HTTP headers". If you want to get all the headers you can simply iterate through the dictionary.
Which part of your code to do this depends on your exact requirement. Anyplace that has access to request should do.
Update
I need to ac...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
... for the normal display and another one for the UISearchBar's table view.
If you only use one FRC (NSFetchedResultsController) then the original UITableView (not the search table view that is active while searching) will possibly have callbacks called while you are searching and try to incorrectly ...
In log4j, does checking isDebugEnabled before logging improve performance?
...re up-to-date logging framework where the log statements take a format specification and a list of arguments to be substituted by the logger—but "lazily," only if the logger is enabled. This is the approach taken by slf4j.
See my answer to a related question for more information, and an example o...
What does Maven Update Project do in Eclipse?
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It syncs the Eclipse project settings with that of the pom. If you for example change important plugin settings, such as the output java version, you will find that Eclipse will ask you to update the project and afterwards the configured Java runtime in the project will have changed t...
What does -fPIC mean when building a shared library?
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PIC stands for Position Independent Code
and to quote man gcc:
If supported for the target machine, emit position-independent code, suitable for dynamic linking and avoiding any limit on the size of the global offset table. This option makes a difference on the m68k, PowerPC and SPARC. ...
What is the difference between fastcgi and fpm?
...pm means FastCGI process manager. Does that mean fastcgi and fpm are same? If they are same, then why do we have two different macports variants for php namely
"php5 +fastcgi" and
"php5 +fpm"
...
Forward host port to docker container
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Is it possible to do this somehow, if the host is only listening on 127.0.0.1?
– HansHarhoff
Oct 5 '16 at 14:34
5
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How to create a hex dump of file containing only the hex characters without spaces in bash?
How do I create an unmodified hex dump of a binary file in Linux using bash? The od and hexdump commands both insert spaces in the dump and this is not ideal.
...
How do I remove all HTML tags from a string without knowing which tags are in it?
... Using regular expressions for this is probably not a good idea if you are using it for security reasons.
– Mathias Lykkegaard Lorenzen
Sep 19 '18 at 7:03
3
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