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90后创业四年:曾经觉得不公 后来愿赌服输 - 资讯 - 清泛网 - 专注C/C++及内核技术
...。比如，2011年我做好友拼图，确实火了一把，但3个月后数据下滑得很厉害，然后就无人问津了。2012年我做上传两张图猜未来宝宝长啥样那个网站时，也能预测到，它肯定会火一阵子，但没法一直火爆下去。这两件事给我的启发...
“elseif” syntax in JavaScript
... @JayK: Haha.. PHP has elseif, perl has elsif (I think), and Python has elif.. that kind of annoyed me at first, but... I guess it's kind of cute. It does serve a slight purpose in Python and PHP though, because it wouldn't work with their colon syntax otherwise.
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Difference between numpy.array shape (R, 1) and (R,)
...ay to think of this is that numpy is working exactly as expected here, but Python's printing of tuples can be misleading. In the (R, ) case, the shape of the ndarray is a tuple with a single elements, so is printed by Python with a trailing comma. Without the extra comma, it would be ambiguous with ...
What's a good rate limiting algorithm?
I could use some pseudo-code, or better, Python. I am trying to implement a rate-limiting queue for a Python IRC bot, and it partially works, but if someone triggers less messages than the limit (e.g., rate limit is 5 messages per 8 seconds, and the person triggers only 4), and the next trigger is ...
How do I implement basic “Long Polling”?
...his, but it is recommended to write a "long-poll server" in something like Python's twisted, which does not rely on one thread per request. cometD is an popular one (which is available in several languages), and Tornado is a new framework made specifically for such tasks (it was built for FriendFeed...
How do I put variables inside javascript strings?
That's how you do it in python. How can you do that in javascript/node.js?
13 Answers
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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
...just assigned None to mylist. If you next try to do, say, mylist.append(1) Python will give you this error.
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Refreshing web page by WebDriver when waiting for specific condition
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In Python there is a method for doing this: driver.refresh(). It may not be the same in Java.
Alternatively, you could driver.get("http://foo.bar");, although I think the refresh method should work just fine.
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Removing cordova plugins from the project
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I do it with this python one-liner:
python -c "import subprocess as sp;[sp.call('cordova plugin rm ' + p.split()[0], shell=True) for p in sp.check_output('cordova plugin', shell=True).split('\n') if p]"
Obviously it doesn't handle any sort ...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...父类和子类指针或应用的互相转化;
static_cast一般是普通数据类型(如int m=static_cast<int>(3.14));
reinterpret_cast很像c的一般类型转换操作
const_cast是把cosnt或volatile属性去掉
介绍
大多程序员在学C++前都学过C，并且习惯于C风格...