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What is the difference between a var and val definition in Scala?
... can, then, go the other direction. If val is that better, why have var at all? Well, some languages did take that route, but there are situations in which mutability improves performance, a lot.
For example, take an immutable Queue. When you either enqueue or dequeue things in it, you get a new Qu...
How can I pipe stderr, and not stdout?
...1 >/dev/null | grep 'something'
For the details of I/O redirection in all its variety, see the chapter on Redirections in the Bash reference manual.
Note that the sequence of I/O redirections is interpreted left-to-right, but pipes are set up before the I/O redirections are interpreted. File ...
Truncate number to two decimal places without rounding
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@DarkHippo Thats because 4.27 is actually 4.26999999999, Math.round is generally a better solution, albeit not the answer to the original question. Realistically given the output is a string this should be done using string manipulation instead of a numeric solu...
How to skip over an element in .map()?
...nce it has some cost, you can use the more general .reduce(). You can generally express .map() in terms of .reduce:
someArray.map(function(element) {
return transform(element);
});
can be written as
someArray.reduce(function(result, element) {
result.push(transform(element));
return result;
}...
How do servlets work? Instantiation, sessions, shared variables and multithreading
... servlet container (like Apache Tomcat) starts up, it will deploy and load all its web applications. When a web application is loaded, the servlet container creates the ServletContext once and keeps it in the server's memory. The web app's web.xml and all of included web-fragment.xml files is parsed...
Make an Installation program for C# applications and include .NET Framework installer into the setup
I've finished my C# application, but I have a little problem:
4 Answers
4
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Is there a command to list all Unix group names? [closed]
I know there is the /etc/group file that lists all users groups.
3 Answers
3
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Where can I find a list of scopes for Google's OAuth 2.0 API? [closed]
...service.
The Google OAuth2 playground, is another good source of info.
Finally if you're interested in tracking changes to the discovery documents or don't want to read all the docs, there is an interesting online implementation by Gerwin Sturm.
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Good introduction to the .NET Reactive Framework [closed]
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I've been dragging my feet learning about Rx because all of the learning materials are in the form of videos. +1 for providing this text-based resource.
– Daniel Schilling
Jan 8 '14 at 19:44
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Using a dictionary to count the items in a list [duplicate]
...common data structure IMO. In fact, C++ has an implementation in the STL called std::multiset (also std::tr1::unordered_multiset) so Guido is not alone in his opinion of its importance.
– awesomo
Oct 18 '11 at 3:07
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