大约有 40,000 项符合查询结果（耗时：0.0257秒） [XML]
Iteration over std::vector: unsigned vs signed index variable
...et away with only a conversion in the forward iterating case, it could actually go wrong all the way in the backward iterating case when using std::size_t, in case std::size_t is wider than what is the typedef of size_type):
Using std::vector
Using iterators
for(std::vector<T>::iterator i...
Detecting taps on attributed text in a UITextView in iOS
...ed to help others a little more. Following on from Shmidt's response it's possible to do exactly as I had asked in my original question.
1) Create an attributed string with custom attributes applied to the clickable words. eg.
NSAttributedString* attributedString = [[NSAttributedString alloc] init...
Very large matrices using Python and NumPy
...re efficient data structures for sparse matrices (matrices with lots of zeros), like scipy.sparse.csc_matrix.
Modify your algorithm to work on submatrices. You can read from disk only the matrix blocks that are currently being used in computations. Algorithms designed to run on clusters usually wo...
How does HTTP file upload work?
...?) always threaded so that they can handle concurrent connections. Essentially, the daemon process that's listening on port 80 immediately hands off the task of serving to another thread/process in order that it can return to listening for another connection; even if two incoming connections arrive...
Super slow lag/delay on initial keyboard animation of UITextField
...rom multitasking, unplug your device from the computer and run the app normally by tapping its icon. I have seen at least two cases in which the delay only occurs while the device is plugged in.
share
|
...
Java NIO FileChannel versus FileOutputstream performance / usefulness
...leChannel.transferFrom(). The key advantage here is that the JVM uses the OS's access to DMA (Direct Memory Access), if present. (This is implementation dependent, but modern Sun and IBM versions on general purpose CPUs are good to go.) What happens is the data goes straight to/from disc, to the b...
How to use pip with Python 3.x alongside Python 2.x
I installed Python 3.x (besides Python 2.x on Ubuntu) and slowly started to pair modules I use in Python 2.x.
10 Answers
...
How can you check which options vim was compiled with?
...e_sysmouse
+mouse_xterm +multi_byte +multi_lang -mzscheme +netbeans_intg -osfiletype
+path_extra -perl +persistent_undo +postscript +printer -profile +python/dyn
-python3 +quickfix +reltime -rightleft +ruby/dyn +scrollbind +signs
+smartindent -sniff +startuptime +statusline -sun_workshop +syntax...
How to free memory in Java?
...
Java uses managed memory, so the only way you can allocate memory is by using the new operator, and the only way you can deallocate memory is by relying on the garbage collector.
This memory management whitepaper (PDF) may help explain what's going on.
You can also call Sy...
What are the most-used vim commands/keypresses?
...rouble wading through the gargantuan lists of things you can do in VIM and all of the keypresses for them. I'm tired of hearing "You can use 'I' for inserting text, or 'a' for appending text after the character, or 'A' for appending text at the end of the line, or…" I can't imagine everyone uses a...