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Why is address zero used for the null pointer?
...t as usable by the platform as an address - the C standard simply had to chose something to use to indicate a null pointer, and zero was chosen. I'm honestly not sure if other sentinel values were considered.
The only requirements for a null pointer are:
it's guaranteed to compare unequal to a ...
Build Android Studio app via command line
... application, you can run ./gradlew assembleDebug from the root of your repository. In a default project setup, the resulting apk can then be found in app/build/outputs/apk/app-debug.apk. On a *nix machine, you can also just run find . -name '*.apk' to find it, if it's not there.
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Change R default library path using .libPaths in Rprofile.site fails to work
...user_name/userLibrary"
The .libPaths function is a bit different than most other nongraphics functions. It works via side-effect. The functions Sys.getenv and Sys.setenv that report and alter the R environment variables have been split apart but .libPaths can either report or alter its target.
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How to tell if JRE or JDK is installed
...VA_HOME to my bash profile (.bashrc, .bash_profile, etc. depending on your OS) like below:
JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"
Here you go!
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Javascript switch vs. if…else if…else
...zation and the different ways different JS engines function. Quote: Since most JavaScript engines don’t have such optimizations, performance of the switch statement is mixed.
– Jasper
May 17 '13 at 17:23
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Error “can't use subversion command line client : svn” when opening android project checked out from
...e Use command client box in the settings screen that you included in your post.
UPDATE
According to this other post, TortoiseSVN doesn't include the command line tools by default. But you can re-run the installer and enable it. That will add svn.exe to PATH, and Android Studio will correctly pick ...
Specifying and saving a figure with exact size in pixels
...'myfig.png', dpi=1000)
Note that I used the figure dpi of 100 to fit in most screens, but saved with dpi=1000 to achieve the required resolution. In my system this produces a png with 3840x7190 pixels -- it seems that the DPI saved is always 0.02 pixels/inch smaller than the selected value, which ...
Error handling in Bash
...disagree. Obviously-broken code gets noticed and fixed. Bad-practices but mostly-working code lives forever (and gets propagated).
– Charles Duffy
May 22 '14 at 16:55
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Does Python support multithreading? Can it speed up execution time?
...he GIL to allow multiple threads of C code and one Python thread to run across multiple cores. This extends to I/O controlled by the kernel, such as select() calls for socket reads and writes, making Python handle network events reasonably efficiently in a multi-threaded multi-core setup.
What many...
What is SaaS, PaaS and IaaS? With examples
...eanstalk, Windows Azure, Heroku, Force.com, Google App Engine, Apache Stratos.
While in SaaS (Software as a Service) model you are provided with access to application software often referred to as "on-demand software". You don't have to worry about the installation, setup and running of the applicat...