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Where is Vagrant saving changes to the VM?
...
Vagrant imports the base box which is located at ~/.vagrant.d/boxes/, like you said.
This is where the base boxes are kept. It uses it to start a VM from the clean state. When importing a VM, the responsibility of where to store data files and V...
Side-by-side plots with ggplot2
....arrange(plot1, plot2, ncol=2)
This is useful when the two plots are not based on the same data, for example if you want to plot different variables without using reshape().
This will plot the output as a side effect. To print the side effect to a file, specify a device driver (such as pdf, png,...
WPF Command Line
...rm the logic:
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
if ( /* test command-line params */ )
{
/* do stuff without a GUI */
}
else
{
new Window1().ShowDialog();
}
this.Shutdown();
}
...
ios app maximum memory budget
...e if I really should free all the memory I can in didReceiveMemoryWarning. Based on Split's and Jasper Pol's answer, using a maximum of 45% of the total device memory appears to be a safe threshold (thanks guys).
In case someone wants to look at my actual implementation:
#import "mach/mach.h"
- (...
Why em instead of px?
...ers, logos or icons. This ensures you almost always need at least some px-based measurements in a design. Images, for example, will (by default) be scaled such that each pixel is 1*px* in size, so if you are designing around an image you'll need px units. It is also very useful for precise font si...
Why is Class.newInstance() “evil”?
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@Ryan: That is not true; all the other reflection-based invocation methods throw a checked exception called InvocationTargetException that wraps any throwable thrown by the invoked method. Class.newInstance won't do that---it will throw the checked exception directly. The do...
ValueError: math domain error
... a logarithm of something that is not positive.
Logarithms figure out the base after being given a number and the power it was raised to. log(0) means that something raised to the power of 2 is 0. An exponent can never result in 0*, which means that log(0) has no answer, thus throwing the math doma...
Installing Python packages from local file system folder to virtualenv with pip
...-any.whl
├───wiz_bang-0.8-py2.py3-none-any.whl
├───base.txt
├───local.txt
└───production.txt
Now in requirements/base.txt put:
--find-links=requirements
foo_bar
wiz_bang>=0.8
A neat way to update proprietary packages, just drop new one in the f...
Foreign Key to multiple tables
I've got 3 relevant tables in my database.
5 Answers
5
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Difference between \n and \r?
... wearing socks, so toes not allowed:-). All other surviving OS's are Unix-based... Windows's the one out, WAY out in many ways. In this specific Q's context -- it's the only one positing TWO bytes (\n\r) as the canonical line-end... for no sensible reason except the ancient-historical ones explain...