大约有 19,000 项符合查询结果（耗时：0.0298秒） [XML]
Can I use the range operator with if statement in Swift?
...r value, so you probably want
200 ... 299 or 200 ..< 300.
Additional information: When the above code is compiled in Xcode 6.3 with
optimizations switch on, then for the test
if 200 ... 299 ~= statusCode
actually no function call is generated at all, only three assembly instruction:
addq ...
Performance surprise with “as” and nullable types
...IT compiler generates a call to a helper function, JIT_Unbox() that can perform a cast to an arbitrary value type. I don't have a great explanation why it is as slow as the cast to Nullable<int>, given that less work ought to be necessary. I suspect that ngen.exe might cause trouble here.
...
node.js child process - difference between spawn & fork
...tion suits the need for many processes/core. You can actually decrease performance by spawning too many workers for your machine/scenario.
Ultimately you could use spawn in a way that did the above, by sending spawn a Node command. But this would be silly, because fork does some things to optimiz...
Regular Expression for alphanumeric and underscores
...of *.
As others have pointed out, some regex languages have a shorthand form for [a-zA-Z0-9_]. In the .NET regex language, you can turn on ECMAScript behavior and use \w as a shorthand (yielding ^\w*$ or ^\w+$). Note that in other languages, and by default in .NET, \w is somewhat broader, and wil...
There is no ViewData item of type 'IEnumerable' that has the key 'xxx'
... the list is null! can you suggest something,
– transformer
Mar 15 '17 at 5:05
4
...
API vs. Webservice [closed]
...ed Java API which allows users to interrogate the database tables to get information about their online advertising campaign.
e.g. call GetNumberClicks (user name)
To implement the API, you have to add the Doubleclick .jar file to your class path. The call is local.
A web service is a form of API...
Get name of property as a string
...se a low-level language like C, and if you need to squeeze every bit of performance like image and video processing, you should use C or C++. but for the other 95% of applications, a managed code framework will be fast enough. Eventually C# is also compiled to machine code, and you can even pre-comp...
Local Storage vs Cookies
...eem to have the same functionality. Are there any pros/cons (especially performance-wise) in using local storage to replace cookie functionality except for the obvious compatibility issues?
...
javascript function leading bang ! syntax
...te it. But that will not work due to specifics of JS grammar.
So shortest form of achieving this is to use some expression e.g. UnaryExpression (and so CallExpression):
!function(){
// do stuff
}();
Or for the fun:
-function(){
// do stuff
}();
Or:
+function(){
// do stuff
}();
...
Is ServiceLocator an anti-pattern?
... a StackOverflow answer that clearly illustrates this benefit in graphical form, which not only applies when using a service locator from another library, but also when using foreign defaults in services.
share
|
...