大约有 44,503 项符合查询结果（耗时：0.0463秒） [XML]
How does push notification technology work on Android?
How has Google implemented their push notification feature? Does it work through polling done by a service running in the background or in a different way?
...
Why split the tag when writing it with document.write()?
Why do some sites (or advertisers that give clients javascript code) employ a technique of splitting the <script> and/or </script> tags up within document.write() calls?
...
Is there any performance gain in indexing a boolean field?
I'm just about to write a query that includes a WHERE isok=1 . As the name implies, isok is a boolean field (actually a TINYINT(1) UNSIGNED that is set to 0 or 1 as needed).
...
Why is semicolon allowed in this python snippet?
...uire semi-colons to terminate statements. Semi colons can be used to delimit statements if you wish to put multiple statements on the same line.
Now, why is this allowed? It's a simple design decision. I don't think Python needs this semi-colon thing, but somebody thought it would be nice to hav...
What is Vim recording and how can it be disabled?
...
You start recording by q<letter>
and you can end it by typing q again.
Recording is a really useful feature of Vim.
It records everything you type. You can then replay it simply by typing @<letter>.
Record search, movement, replacement...
One of the best feature of...
Express next function, what is it really for?
...description of what the next() method does. In the Express documentation it says that next('route') can be used to jump to that route and skip all routes in between, but sometimes next is called without arguments. Anybody knows of a good tutorial etc that describes the next function?
...
HTML “overlay” which allows clicks to fall through to elements behind it [duplicate]
I'm trying to overlay a element on top of a webpage (to draw arbitrary graphics), and I've come to the point where I can stack it inside of a element on top of everything, but this prevents the user from clicking on any links/buttons/etc.
Is there a way to have its content float on top of everythi...
Bamboo Vs. Hudson(a.k.a. Jenkins) vs Any other CI systems [closed]
Anyone out there have experience with both Hudson and Bamboo? Any thoughts on the relative strengths and weaknesses of these products?
...
Is there a better way of writing v = (v == 0 ? 1 : 0); [closed]
I want to toggle a variable between 0 and 1. If it's 0 I want to set it to 1, else if it's 1 I want to set it to 0.
31 Answ...
How does “this” keyword work within a function?
I just came across an interesting situation in JavaScript. I have a class with a method that defines several objects using object-literal notation. Inside those objects, the this pointer is being used. From the behavior of the program, I have deduced that the this pointer is referring to the ...