大约有 11,400 项符合查询结果（耗时：0.0189秒） [XML]
关于我们 · App Inventor 2 中文网，少儿编程陪伴者
...：手机和电脑必须在同一局域网内，原理是电脑端启动WEB服务器，手机AI伴侣与WEB通信；电脑连手机热点，也是OK的。 扫码关注网页底部公众号，观看置顶视频，AI伴侣的各种测试方式均有讲解。 ...
When to use nil, blank, empty? [duplicate]
Is there any guidelines on how to differentiate between .nil? , .blank? and .empty? ?
4 Answers
...
Is cout synchronized/thread-safe?
...ng. However, do things like cout get special treatment in the standard library?
4 Answers
...
What's the opposite of chr() in Ruby?
... languages there's a pair of functions, chr() and ord() , which convert between numbers and character values. In some languages, ord() is called asc() .
...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
I have been using OpenJDK for ages, initially for small projects where it has no problems. But since I started to play with it for big toys, I started to notice random/unknown fatal error and crashes (with H.264 codecs, etc.), and it was a nightmare till then to get ride of system crash+fatal errors...
Passing Data between View Controllers
I'm new to iOS and Objective-C and the whole MVC paradigm and I'm stuck with the following:
46 Answers
...
Should CSS always preceed Javascript?
...ery interesting question. I've always put my CSS <link href="...">s before my JS <script src="...">s because "I read one time that it's better." So, you're right; it's high time we do some actual research!
I set up my own test harness in Node (code below). Basically, I:
Made sure t...
What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
...
Koenig Lookup, or Argument Dependent Lookup, describes how unqualified names are looked up by the compiler in C++.
The C++11 standard § 3.4.2/1 states:
When the postfix-expression in a function call (5.2.2) is an unqualified-id, other namespaces not considered during th...
Find TODO tags in Eclipse
... methods were auto-generated and include // TODO Auto-generated method stub
5 Answers
...
How to unzip a list of tuples into individual lists? [duplicate]
...nts from all inputs, starting with the first values, then the second, etc. By using *l you apply all tuples in l as separate arguments to the zip() function, so zip() pairs up 1 with 3 with 8 first, then 2 with 4 and 9. Those happen to correspond nicely with the columns, or the transposition of l.
...