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What is the difference between require() and library()?
...parameter of install.packages(), such as
install.packages(package, repos="http://cran.us.r-project.org")
You can wrap require() and library() in suppressPackageStartupMessages() to, well, suppress package startup messages, and also use the parameters require(..., quietly=T, warn.conflicts=F) if ne...
How to compare variables to undefined, if I don’t know whether they exist? [duplicate]
...e doing a fair amount of javascript, I suggest running code through JSLint http://www.jslint.com it might seem a bit draconian at first, but most of the things JSLint warns you about will eventually come back to bite you.
sh...
When do you use varargs in Java?
...llow this link(it helped me a lot in understanding this concept clearly):
http://www.javadb.com/using-varargs-in-java
P.S: Even I was afraid of using varargs when I didn't knw abt it. But now I am used to it.
As it is said: "We cling to the known, afraid of the unknown", so just use it as much as ...
Server is already running in Rails
... Booting WEBrick
=> Rails 4.0.4 application starting in development on http://0.0.0.0:3000
=> Run rails server -h for more startup options
=> Ctrl-C to shutdown server
A server is already running. Check /your_project_path/tmp/pids/server.pid.
Exiting
So place your path shown here /your...
Override Java System.currentTimeMillis for testing time sensitive code
...me gets back to normal after a number of calls - here is the issue report: http://code.google.com/p/jmockit/issues/detail?id=43
To overcome this we have to turn on one specific HotSpot optimization - run JVM with this argument -XX:-Inline.
While this may not be perfect for production, it is just f...
What are the differences between the different saving methods in Hibernate?
...
This link explains in good manner :
http://www.stevideter.com/2008/12/07/saveorupdate-versus-merge-in-hibernate/
We all have those problems that we encounter just infrequently enough that when we see them again, we know we’ve solved this, but can’t remembe...
What's the Linq to SQL equivalent to TOP or LIMIT/OFFSET?
... that Foo is a column in MyTable that gets mapped to a property name.
See http://blogs.msdn.com/vbteam/archive/2008/01/08/converting-sql-to-linq-part-7-union-top-subqueries-bill-horst.aspx for more detail.
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Why do some claim that Java's implementation of generics is bad?
... can't be inspected as generics.
Great overview of the differences here: http://www.jprl.com/Blog/archive/development/2007/Aug-31.html
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Remove Application Insight from application on Visual Studio 2013
...ually.
What Microsoft has to say
The Microsoft Azure documentation here: https://azure.microsoft.com/en-gb/documentation/articles/app-insights-troubleshoot-faq/, says:
What does Application Insights modify in my project?
The details depend on the type of project. For a web application:
...
What is the __del__ method, How to call it?
...s sense. If you need to use __del__, be aware of the basic limitations per http://docs.python.org/reference/datamodel.html:
__del__ is called when the garbage collector happens to be collecting the objects, not when you lose the last reference to an object and not when you execute del object.
__de...