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Factors in R: more than an annoyance?
One of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I'm missing something.
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How to get a URL parameter in Express?
I am facing an issue on getting the value of tagid from my URL: localhost:8888/p?tagid=1234 .
4 Answers
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How does MongoDB sort records when no sort order is specified?
When we run a Mongo find() query without any sort order specified, what does the database internally use to sort the results?
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Path to Powershell.exe (v 2.0)
...ershell (version 2.0) located? What is the path to Powershell.exe? I have Windows Server 2008 and Powershell installed. When I look at this folder:
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CSS overflow-x: visible; and overflow-y: hidden; causing scrollbar issue
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After some serious searching it seems i've found the answer to my question:
from: http://www.brunildo.org/test/Overflowxy2.html
In Gecko, Safari, Opera, ‘visible’
becomes ‘auto’ also when combined with
‘hidden’ (in other words: ...
淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...带来了挑战。为此，我们设计了通用的数据中间层——glider——来屏蔽这个影响。glider以HTTP协议对外提供restful方式的接口。数据产品可以通过一个唯一的URL获取到它想要的数据。
以上是淘宝海量数据产品在技术架构方面的一...
Android image caching
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And now the punchline: use the system cache.
URL url = new URL(strUrl);
URLConnection connection = url.openConnection();
connection.setUseCaches(true);
Object response = connection.getContent();
if (response instanceof Bitmap) {
Bitmap bitm...
How can you dynamically create variables via a while loop? [duplicate]
I want to create variables dynamically via a while loop in Python. Does anyone have any creative means of doing this?
8 Ans...
In Vim, how do I apply a macro to a set of lines?
I have a file with a bunch of lines. I have recorded a macro that performs an operation on a single line. I want to repeat that macro on all of the remaining lines in the file. Is there a quick way to do this?
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Python Requests and persistent sessions
I am using the requests module (version 0.10.0 with Python 2.5).
I have figured out how to submit data to a login form on a website and retrieve the session key, but I can't see an obvious way to use this session key in subsequent requests.
Can someone fill in the ellipsis in the code below or sug...