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How is “int* ptr = int()” value initialization not illegal?
...: In ubuntu 11.04 and our own linux flavor, libio.h contains: #if !defined(__cplusplus) \n #define NULL ((void*)0) \n #else \n #define NULL (0) the current version of gcc in ubuntu is 4.5, in our system is 4.0.
– David Rodríguez - dribeas
Nov 9 '11 at 17:33
...
How to trace the path in a Breadth-First Search?
... found
if node == end:
return path
# enumerate all adjacent nodes, construct a new path and push it into the queue
for adjacent in graph.get(node, []):
new_path = list(path)
new_path.append(adjacent)
queue.append(new_path)
prin...
What is a semaphore?
...s bouncers at a nightclub. There are a dedicated number of people that are allowed in the club at once. If the club is full no one is allowed to enter, but as soon as one person leaves another person might enter.
It's simply a way to limit the number of consumers for a specific resource. For exampl...
Base64 length calculation?
...
I explained all this in the answer above: (i) each output char represents 6 bits of input, (ii) 4 output chars therefore represent 4 * 6 = 24 bits, (iii) 24 bits is 3 bytes, (iv) 3 bytes of input therefore result in 4 chars of output, (...
Big-O for Eight Year Olds? [duplicate]
...ore about what this means to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the number of operations it has to perform won't...
How to format current time using a yyyyMMddHHmmss format?
...
acturally the golang format is very strange. why not use the yyyymmddHHiiss style , but use the ""2006/01/02/15/04/05", I have not get it the real reason
– Kewin
May 10 '16 at 14:32
...
download file using an ajax request
...n as your site.
You could always make the AJAX request/window.location a fallback by using some JavaScript to test if download is supported and if not, switching it to call window.location.
Original answer
You can't have an AJAX request open the download prompt since you physically have to naviga...
What is the “assert” function?
...
assert will terminate the program (usually with a message quoting the assert statement) if its argument turns out to be false. It's commonly used during debugging to make the program fail more obviously if an unexpected condition occurs.
For example:
assert(len...
Best practices to test protected methods with PHPUnit
... not be coupled with the test. This makes refactoring impossible and eventually you don't test what needs to be tested. You need to test them indirectly using public methods. If you find this difficult, almost sure that there is a problem with the composition of the class and you need to separate it...
STL or Qt containers?
... (see the std::string COW controversy). Some STL implementations are especially
bad.
provide hashes, which are not available unless you use TR1
The QTL has a different philosophy from the STL, which is well summarized by J. Blanchette: "Whereas STL's containers are optimized for raw speed, Qt's co...