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Is it possible to have a multi-line comments in R? [duplicate]
I found this old thread (from over a year ago), which explains how come R doesn't support a multi-line comments (like /* comment */ of PHP, for example).
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How to select a radio button by default? [duplicate]
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XHTML solution:
<input type="radio" name="imgsel" value="" checked="checked" />
Please note, that the actual value of checked attribute does not actually matter; it's just a convention to assign "checked". Most impor...
Spring - @Transactional - What happens in background?
...t uses AOP at its foundation.
But at a very high level, Spring creates proxies for classes that declare @Transactional on the class itself or on members. The proxy is mostly invisible at runtime. It provides a way for Spring to inject behaviors before, after, or around method calls into the object ...
Difference between int[] array and int array[]
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They are semantically identical. The int array[] syntax was only added to help C programmers get used to java.
int[] array is much preferable, and less confusing.
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How to write to an existing excel file without overwriting data (using pandas)?
I use pandas to write to excel file in the following fashion:
11 Answers
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When does invoking a member function on a null instance result in undefined behavior?
...behavior" is mentioned in notes in both §1.9/4 and §8.3.2/4, it's never explicitly stated. (Notes are non-normative.)
However, one can try to deduced it from §3.10/2:
An lvalue refers to an object or function.
When dereferencing, the result is an lvalue. A null pointer does not refer to a...
How to find time complexity of an algorithm
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How to find time complexity of an algorithm
You add up how many machine instructions it will execute as a function of the size of its input, and then simplify the expression to the largest (when N is very large) term and can include any simplify...
Node.js/Windows error: ENOENT, stat 'C:\Users\RT\AppData\Roaming\npm'
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Manually creating a folder named 'npm' in the displayed path fixed the problem.
More information can be found on Troubleshooting page
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What's wrong with using == to compare floats in Java?
...ygnus-software.com/papers/comparingfloats/comparingfloats.htm) for why a fixed epsilon isn't always a good idea. Specifically, as the values in the floats being compared get large (or small), the epsilon is no longer appropriate. (Using epsilon is fine if you know your float values are all relativ...
usr/bin/ld: cannot find -l
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If your library name is say libxyz.so and it is located on path say:
/home/user/myDir
then to link it to your program:
g++ -L/home/user/myDir -lxyz myprog.cpp -o myprog
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