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What is the point of function pointers?
...at takes its sorting criterion as a pointer to a comparison function.
In C++, this is often done using function objects (also called functors). These are objects that overload the function call operator, so you can call them as if they were a function. Example:
class functor {
public:
voi...
What is the difference between new/delete and malloc/free?
...he language concept known as "heap" or the os concept of "processes heap". C++ is deliberately defined to be Platform/OS/Compiler neutral. So using a specific OS concept like "processes heap" would undermine the flexibility of the standard.
– Martin York
Feb 21...
Fastest way to check if a file exist using standard C++/C++11/C?
I would like to find the fastest way to check if a file exist in standard C++11, C++, or C. I have thousands of files and before doing something on them I need to check if all of them exist. What can I write instead of /* SOMETHING */ in the following function?
...
How do you iterate through every file/directory recursively in standard C++?
How do you iterate through every file/directory recursively in standard C++?
16 Answers
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Best practices for circular shift (rotate) operations in C++
Left and right shift operators (>) are already available in C++.
However, I couldn't find out how I could perform circular shift or rotate operations.
...
How do I test if a string is empty in Objective-C?
...the string isn't empty, when, for practical purposes, it is). Consider @"\u200B" (consisting only of Unicode character ZERO WIDTH SPACE. Printing it out will print 0 characters (verify using monospaced font), but string.length will give 1. There are other Unicode characters (like OBJECT REPLACEMENT ...
How to disable textarea resizing?
...al with limit
textarea { resize: horizontal; max-width: 400px; min-width: 200px; }
disable horizontal and vertical with limit
textarea { resize: vertical; max-height: 300px; min-height: 200px; }
I think min-height should be useful for you
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Detect if Android device has Internet connection
...
urlc.connect();
return (urlc.getResponseCode() == 200);
} catch (IOException e) {
Log.e(LOG_TAG, "Error checking internet connection", e);
}
} else {
Log.d(LOG_TAG, "No network available!");
}
return false;
}
Of course you ca...
Why aren't pointers initialized with NULL by default?
...Or under other conditions the variable is potentially never used. A lot of C++ developers would scream foul under both conditions at the cost of that extra instruction.
It's not just about time. But also space. There are a lot of environments where both resources are at a premium and the developers...
How to serve an image using nodejs
...estroy();
} else {
con.write('HTTP/1.1 200 OK\n');
con.write('Content-Type: '+type+'\n');
con.write('Content-Length: '+data.byteLength+'\n\n');
con.write(data);
con.destroy();
...