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Use of ~ (tilde) in R programming Language
...".
The myFormula <- part of that line stores the formula in an object called myFormula so you can use it in other parts of your R code.
Other common uses of formula objects in R
The lattice package uses them to specify the variables to plot.
The ggplot2 package uses them to specify panels fo...
How persistent is localStorage?
I'm depending heavily on localStorage for a plugin I'm writing. All the user settings are stored in it. Some settings require the user the write regex'es and they would be sad if their regex rules are gone at some point.
So now I am wondering just how persistent the localStorage is.
...
When to use next() and return next() in Node.js
... return next() is to ensure that the execution stops after triggering the callback.
If you don't do it, you risk triggering the callback a second time later, which usually has devastating results. Your code is fine as it is, but I would rewrite it as:
app.get('/users/:id?', function(req, res, next...
How can I output UTF-8 from Perl?
...sults. I'm using Mac OS X 10.5 (Leopard), and I'm editing with TextMate. All of my settings for both my editor and operating system are defaulted to writing files in utf-8 format.
...
mysql create user if not exists
...alhost' IDENTIFIED BY 'password';
Note that the 5.7.6 method doesn't actually grant any permissions.
If you aren't using a version which has this capability (something below 5.7.6), you can do the following:
GRANT ALL ON `database`.* TO 'user'@'localhost' IDENTIFIED BY 'password';
This will ...
NUnit vs. xUnit
...net is v2.1.
Both of the frameworks are awesome, and they both support parallel test running (in a different way though). NUnit has been around since 2002, it's widely used, well documented and has a large community, whereas xUnit.net is more modern, more TDD adherent, more extensible, and also tre...
How do you run a single query through mysql from the command line?
...ybyte Assuming Linux: Insinde doublequotes the asterisk * gets expanded to all files in the current directory, while this expansion does not happen in singlequotes, thats the reason why. Doublequotes will work for quesries without the *.
– NobbZ
Apr 3 '18 at 7:...
Maintain git repo inside another git repo
... Git submodules.
Git addresses this issue using submodules. Submodules allow you to keep a Git repository as a subdirectory of another Git repository. This lets you clone another repository into your project and keep your commits separate.
...
How to use a WSDL file to create a WCF service (not make a call)
...cutil your.wsdl /l:vb if you want Visual Basic)
This will create a file called "your.cs" in C# (or "your.vb" in VB.NET) which contains all the necessary items.
Now, you need to create a class "MyService" which will implement the service interface (IServiceInterface) - or the several service inter...
How to require a controller in an angularjs directive
...});
Each directive will get its own instance of the controller, but this allows you to share the logic between as many components as you want.
Require a Controller
If you want to share the same instance of a controller, then you use require.
require ensures the presence of another directive an...