大约有 10,700 项符合查询结果（耗时：0.0326秒） [XML]
Python: Select subset from list based on index set
..._asel = [property_a[i] for i in good_indices]
The latter one is faster because there are fewer good_indices than the length of property_a, assuming good_indices are precomputed instead of generated on-the-fly.
Edit: The first option is equivalent to itertools.compress available since Python 2.7...
What does glLoadIdentity() do in OpenGL?
...are always relative to the matrix's current state. So for instance, if you call glTranslate, you are translating from the matrix's current 'position', not from the origin. But if you want to start over at the origin, that's when you call glLoadIdentity(), and then you can glTranslate from the matrix...
Git fast forward VS no fast forward merge
...ur history when you do feature branch merging with --no-ff.
If you do not care about such thing - you could probably get away with FF whenever it is possible. Thus you will have more svn-like feeling of workflow.
For example, the author of this article thinks that --no-ff option should be default...
What exception classes are in the standard C++ library
...
std::exception <exception> interface (debatable if you should catch this)
std::bad_alloc <new> failure to allocate storage
std::bad_array_new_length <new> invalid array length
std::bad_cast <typeinfo> execution of an invalid dynamic-cast
std::bad_ex...
How do you loop through currently loaded assemblies?
I've got a "diagnostics" page in my ASP.NET application which does things like verify the database connection(s), display the current appSettings and ConnectionStrings, etc. A section of this page displays the Assembly versions of important types used throughout, but I could not figure out how to e...
Cannot use ref or out parameter in lambda expressions
Why can't you use a ref or out parameter in a lambda expression?
5 Answers
5
...
How to create your own library for Android development to be used in every program you write?
...and have written, over the years, hundreds of classes and routines which I can use in every Delphi program I write.
5 Answe...
Difference between a Seq and a List in Scala
...
In Java terms, Scala's Seq would be Java's List, and Scala's List would be Java's LinkedList.
Note that Seq is a trait, which is equivalent to Java's interface, but with the equivalent of up-and-coming defender methods. Scala's List is an a...
With bash, how can I pipe standard error into another process?
...so process substitution. Which makes a process substitute for a file.
You can send stderr to a file as follows:
process1 2> file
But you can substitute a process for the file as follows:
process1 2> >(process2)
Here is a concrete example that sends stderr to both the screen and appen...
Difference between dispatch_async and dispatch_sync on serial queue?
...");
it always print 1234
Note: For first code, it won't print 1324. Because printf("3") is dispatched after printf("2") is executed. And a task can only be executed after it is dispatched.
The execution time of the tasks doesn't change anything. This code always print 12
dispatch_async(_ser...