大约有 36,010 项符合查询结果（耗时：0.0588秒） [XML]
C++, copy set to vector
...:copy(input.begin(), input.end(), std::back_inserter(output));
std::copy doesn't add elements to the container into which you are inserting: it can't; it only has an iterator into the container. Because of this, if you pass an output iterator directly to std::copy, you must make sure it points t...
CocoaPods and GitHub forks
...ushed your changes to your fork, get the SHA of your last commit. You can do this using git rev-parse origin/master | pbcopy or on the GitHub commits page for your project:
Then, you can specify the specific commit on your fork in your Podfile like this:
pod 'TTTAttributedLabel', :git => 'htt...
COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...base allows COUNT(tableHere) or COUNT(tableHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those rare cases is equivalent to count(*)
Use count(*) for counting
Use * for all your queries that need to count everything, ...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...st. The explanation that yield from g is equivalent to for v in g: yield v does not even begin to do justice to what yield from is all about. Because, let's face it, if all yield from does is expand the for loop, then it does not warrant adding yield from to the language and preclude a whole bunch o...
Why does C++ not have reflection?
...'s a lot of work to add, and the C++ committee is fairly conservative, and don't spend time on radical new features unless they're sure it'll pay off. (A suggestion for adding a module system similar to .NET assemblies has been made, and while I think there's general consensus that it'd be nice t...
Can't pickle when using multiprocessing Pool.map()
...od, a bound method; so of course pickle now tries to pickle THAT -- and it does as you've told it to: by calling _pickle_method, recursively. I.e. by OOing the code in this way, you have inevitably introduced infinite recursion. I suggest going back to Steven's code (and not worshipping at the alt...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...or is to not throw an error when the data is invalid. this accepted answer does NOT solve that. thanks Matthew! great work!
– Shawn Kovac
Aug 6 '14 at 23:36
3
...
How to list all installed packages and their versions in Python?
...
WOW: Just looked into documentation of latest version of pip and seems like they have added pip list: pip-installer.org/en/latest/usage.html#pip-list - so this is actually something that is coming already!
– jsalonen
...
How can I access “static” class variables within class methods in Python?
...
But if you don't intend for there to be an ivar, its clearer to use Foo.classmember.
– mk12
Sep 13 '09 at 20:58
2
...
Git: How to edit/reword a merge commit's message?
How do I edit or reword a merge commit's message?
6 Answers
6
...