大约有 30,000 项符合查询结果(耗时:0.0231秒) [XML]

https://stackoverflow.com/ques... 

REST API Best practice: How to accept list of parameter values as input [closed]

...fy resources. Each resource should have one canonical URI. This does not mean that you can't have two URIs point to the same resource but there are well defined ways to go about doing it. If you do decide to use both the JSON and list based formats (or any other format) you need to decide which o...
https://stackoverflow.com/ques... 

ViewBag, ViewData and TempData

... view. Used to pass data from controller to corresponding view. Short life means value becomes null when redirection occurs. This is because their goal is to provide a way to communicate between controllers and views. It’s a communication mechanism within the server call. Difference between View...
https://stackoverflow.com/ques... 

Is there any kind of hash code function in JavaScript?

...fined behaviour in JavaScript -- specifically a toString conversion occurs meaning that you can can define your own toString function on the object that will be used as the property name. - olliej This brings up another interesting point; you can define a toString method on the objects you want to...
https://stackoverflow.com/ques... 

UIBarButtonItem with custom image and no border

... @NileshTupe what do you mean? You pass selector method and target - so target can be whatever object you want – Vladimir Sep 21 '11 at 7:24 ...
https://stackoverflow.com/ques... 

Django queries - id vs pk

... up pk attribute name in meta. %timeit obj.id 46 ns ± 0.187 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each) %timeit obj.pk 347 ns ± 11.3 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) Here is the relevant Django code: def _get_pk_val(self, meta=None): meta = m...
https://stackoverflow.com/ques... 

how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?

... Try to do an UPDATE. If it doesn't modify any row that means it didn't exist, so do an insert. Obviously, you do this inside a transaction. You can of course wrap this in a function if you don't want to put the extra code on the client side. You also need a loop for the very rar...
https://stackoverflow.com/ques... 

React JSX: selecting “selected” on selected option

... for those of you like me who asking them self what the ... means: reactjs.org/docs/jsx-in-depth.html#spread-attributes – talsibony Dec 25 '17 at 21:31 ...
https://stackoverflow.com/ques... 

What's the $unwind operator in MongoDB?

...ta is in the form of documents and collections, which allows for a dynamic means of adding and obtaining the data from your storage locations. That being said, in order to understand the concept behind the $unwind parameter, you first must understand what the use case that you are trying to quote i...
https://stackoverflow.com/ques... 

How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause

... Does this mean that they have the safe effect, but a different system is responsible for making it happen? – Anonymoose Apr 15 '12 at 15:14 ...
https://stackoverflow.com/ques... 

setTimeout or setInterval?

...l will also delay, since JavaScript isn't a multi-threaded language, which means that - if there are other parts of the script running - the interval will have to wait for that to finish. In this Fiddle, you can clearly see that the timeout will fall behind, while the interval is almost all the tim...