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What is boxing and unboxing and what are the trade offs?
... which is ever so convenient. Primitives (in Java at least) don't descend from Object, can't have fields, can't have methods, and just generally behave very differently from other types of values. On the other hand, working with them can be very fast and space efficient. Thus the trade off.
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Undefined reference to `sin` [duplicate]
...his standard, specifically separates out the "Standard C library" routines from the "Standard C Mathematical Library" routines (page 277). The pertinent passage is copied below:
Standard C Library
The Standard C library is automatically searched by
cc to resolve external references. Thi...
What is the difference between MVC and MVVM? [closed]
...ew is displaying it, but more importantly no idea where its data is coming from.
*Note: in practice Controllers remove most of the logic, from the ViewModel, that requires unit testing. The VM then becomes a dumb container that requires little, if any, testing. This is a good thing as the VM is just...
What is the command to exit a Console application in C#?
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Several options, by order of most appropriate way:
Return an int from the Program.Main method
Throw an exception and don't handle it anywhere (use for unexpected error situations)
To force termination elsewhere, System.Environment.Exit (not portable! see below)
Edited 9/2013 to improve r...
Is APC compatible with PHP 5.4 or PHP 5.5?
...with the current SVN releases, there is still the odd report of edge cases from people under certain configurations, or under heavy load.
As with everything you would want to use in a production environment, make sure you thoroughly test any release (beta or stable) in development or pre-production ...
Why do results vary based on curly brace placement?
Why do the code snippets below, taken from this article , produce different results due to only a single change in the placement of curly braces?
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C default arguments
...oblem and allow for an empty call. #define vrange(...) CALL(range,(param){.from=1, .to=100, .step=1, __VA_ARGS__})
– u0b34a0f6ae
Oct 29 '11 at 4:58
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How to concatenate items in a list to a single string?
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adding a map actually helps with datatypes apart from string. Great!
– appleboy
Feb 28 '19 at 7:55
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What does appending “?v=1” to CSS and Javascript URLs in link and script tags do?
I have been looking at a HTML 5 boilerplate template (from http://html5boilerplate.com/ ) and noticed the use of "?v=1" in URLs when referring to CSS and Javascript files.
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Calculating days between two dates with Java
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UPDATE: The original answer from 2013 is now outdated because some of the classes have been replaced. The new way of doing this is using the new java.time classes.
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd MM yyyy");
String inputString1 =...