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How to use shared memory with Linux in C
... you'd rather use the old-style tools.
The mmap() function can be used to allocate memory buffers with highly customizable parameters to control access and permissions, and to back them with file-system storage if necessary.
The following function creates an in-memory buffer that a process can sha...
How to get relative path from absolute path
...ow an exception if the file or path doesn't exist since this could be a totally legal case.
– VVS
Jun 2 '09 at 12:01
2
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Calculate business days
...case the whole interval is within a week, in the second case the interval falls in two weeks.
if ($the_first_day_of_week <= $the_last_day_of_week) {
if ($the_first_day_of_week <= 6 && 6 <= $the_last_day_of_week) $no_remaining_days--;
if ($the_first_day_of_week &l...
Factors in R: more than an annoyance?
...of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I'm missing something.
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What is the point of a private pure virtual function?
...an be overridden in the derived classes. Methods of derived classes can't call virtual functions from the base class, but they can provide their own implementation for them. According to Herb Sutter, having public non-virtual interface in the base class and a private implementation that can be custo...
CSS Input with width: 100% goes outside parent's bound
...el, an element's width and height are applied to its content box. Padding falls outside of that content box and increases the element's overall size.
As a result, if you set an element with padding to 100% width, it's padding will make it wider than 100% of its containing element. In your context, i...
How can I check if a program exists from a Bash script?
...type or command are way cheaper), you can also rely on the builtins to actually do what you want, while the effects of external commands can easily vary from system to system.
Why care?
Many operating systems have a which that doesn't even set an exit status, meaning the if which foo won't even wor...
iOS Image Orientation has Strange Behavior
...erty. If the metadata specifies the orientation of the image which is generally ignored by other OS but Mac. Most of images taken are having their meta data property set to right angle. So Mac shows it 90 degree rotated manner. You can see the same image in proper way in windows OS.
For more detail...
How do I create a random alpha-numeric string in C++?
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C++11 allows you to separate the generator from the engine, but what is best depends on what the needs of your application are. This is why my first snippet uses rand and the second does not.
– Carl
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CSS: Control space between bullet and
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+1 for actually answering the guy's question ;) (though the span should ideally in real life have a class anyway for good practice futureproofing as well as semantics: if in future any javascript or new features development etc had a go...