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How to recognize USB devices in Virtualbox running on a Linux host? [closed]
...and log in again
Attach to your PC the USB devices you want to be automatically mounted in the VM (virtual machine).
Open Virtualbox
Select your VM and go to "Machine" -> "Settings" -> "USB".
Check "Enable USB Controller"; click on the icon with the USB plug and the plus, and
click on the devi...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...e to go with @Moody_Mudskipper's answer: Using .drop=FALSE can give potentially unexpected results when one or more grouping variables are not coded as factors. See examples below:
library(dplyr)
data(iris)
# Add an additional level to Species
iris$Species = factor(iris$Species, levels=c(levels(ir...
Passing data between controllers in Angular JS?
...roller('ProductController', function($scope, productService) {
$scope.callToAddToProductList = function(currObj){
productService.addProduct(currObj);
};
});
In your CartController, get the products from the service:
app.controller('CartController', function($scope, productService)...
Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
...e two main reasons that one would create an Implicitly Unwrapped Optional. All have to do with defining a variable that will never be accessed when nil because otherwise, the Swift compiler will always force you to explicitly unwrap an Optional.
1. A Constant That Cannot Be Defined During Initializ...
How to execute multi-line statements within Python's own debugger (PDB)
So I am running a Python script within which I am calling Python's debugger, PDB by writing:
6 Answers
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R memory management / cannot allocate vector of size n Mb
...
Consider whether you really need all this data explicitly, or can the matrix be sparse? There is good support in R (see Matrix package for e.g.) for sparse matrices.
Keep all other processes and objects in R to a minimum when you need to make obj...
How do I ignore a directory with SVN?
...
If you want to ignore more than one file/folder, add all of their names to a txt file, one line each, and use the following variant: svn propset svn:ignore -F file.txt .
– petervaz
Aug 7 '12 at 19:22
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Should I prefer pointers or references in member data?
... be null. This can be an advantage, but if the code ever needs changing to allow rebinding or for the member to be null, all uses of the member need to change
unlike pointer members, references can't easily be replaced by smart pointers or iterators as refactoring might require
Whenever a reference ...
Getting Spring Application Context
Is there a way to statically/globally request a copy of the ApplicationContext in a Spring application?
16 Answers
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How to install XNA game studio on Visual Studio 2012?
...y still having a copy of 2010 for when i want to fiddle with XNA. This installed it easy and with lightning speed for Win7/VS2012. Now i can nuke my copy and fiddle some with an old project of mine. Thanks a lot!
– Madmenyo
Mar 18 '14 at 18:00
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