大约有 40,000 项符合查询结果（耗时：0.0501秒） [XML]
When to use NSInteger vs. int
... I would recommend using NSInteger/CGFloat when interacting with iOS API's etc if you are also building your app for arm64.
This is because you will likely get unexpected results when you use the float, long and int types.
EXAMPLE: FLOAT/DOUBLE vs CGFLOAT
As an example we take the UITableView dele...
logger configuration to log to file and print to stdout
...to customize the log format and add things like filename/line, thread info etc.)
The setup above needs to be done only once near the beginning of the script. You can use the logging from all other places in the codebase later like this:
logging.info('Useful message')
logging.error('Something bad h...
How to use timeit module
...tter_minmod arr1
python -m timeit -s "$SETUP" "better_minmod(arr1)"
... etc
This can take a bit longer due to the multiple initialisations, but normally that's not a big deal.
But what if you want to use timeit inside your module?
Well, the simple way is to do:
def function(...):
...
...
oracle group 取每组第一条 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...t of operations performed in a query except for the final ORDER BY clause. All joins and all WHERE , GROUP BY , and HAVING clauses are completed before the analytic functions are processed. Therefore, analytic functions can appear only in the select list or ORDER BY clause.
语法结构：
analy...
How to elegantly ignore some return values of a MATLAB function?
...can then call
val_i_want = kthout(3,@myfunc,func_input_1,func_input_2); %etc
you could also wrap up the function like
func_i_want = @(varargin)(kthout(3,@myfunc,varargin{:})); %assuming you want the 3rd output.
after which you use
val_i_want = func_i_want(func_input_1,func_input_2);
note ...
Saving an Object (Data persistence)
...kler = pickle.Pickler(output, -1)
pickler.dump(obj1)
pickler.dump(obj2)
etc...
Note: If you're in an environment running different versions of Python, then you'll probably want to explicitly use (i.e. hardcode) a specific protocol number that all of them can read (later versions can generally r...
C++应用程序添加VBScript和JavaScript支持 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...ick, btnCancel_Click,LoadUserData(strUsername), SaveUserData(strUserData), etc... and each of your DLL will have to implement them.
You may have your script to do a complete task and you will load the script file based on the task (theCScriptObject class can load a script file for you!).
Exampl...
Why doesn't Python have a sign function?
...didn't agree on what it should return in all the edge cases (+/-0, +/-nan, etc)
So they decided to implement only copysign, which (although more verbose) can be used to delegate to the end user the desired behavior for edge cases - which sometimes might require the call to cmp(x,0).
I don't know...
Changing the image source using jQuery
...ot waiting for image load to do afterward actions like maturing image size etc.
You will need to use jQuery .load() method to do stuff after image load.
$('yourimageselector').attr('src', 'newsrc').load(function(){
this.width; // Note: $(this).width() will not work for in memory images
});
...
How Drupal works? [closed]
...s theming/skinning system. There, it's wrapped in sidebars/headers/widgets/etc..
The rendered page is then handed back to apache and it gets sent back to the user's browser.
During that entire process, Drupal and third-party plugin modules are firing off events, and listening for them to respond. ...