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The order of keys in dictionaries
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From http://docs.python.org/tutorial/datastructures.html:
"The keys() method of a dictionary object returns a list of all the keys used in the dictionary, in arbitrary order (if you want it sorted, just apply the sorted() functio...
从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...：处理无打分的偏好数据。
相似度算法介绍，摘自：http://www.cnblogs.com/dlts26/archive/2012/06/20/2555772.html
5. 近邻算法工具集
近邻算法只对于UserCF适用，通过近邻算法给相似的用户进行排序，选出前N个最相似的，作为最终推荐的...
'printf' vs. 'cout' in C++
...d, while int64_t will require using %"PRId64". The tables are available at http://en.cppreference.com/w/cpp/io/c/fprintf and http://en.cppreference.com/w/cpp/types/integer.
You can't print the NUL byte, \0
Because printf uses C strings as opposed to C++ strings, it cannot print NUL byte without sp...
Differences between SP initiated SSO and IDP initiated SSO
...0 Getting Started Guide that you can poke through that may help as well -- https://documentation.pingidentity.com/pingfederate/pf80/index.shtml#gettingStartedGuide/task/idpInitiatedSsoPOST.html
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Custom attributes - Yea or nay?
...oad other attributes with hacks, so your HTML can stay semantic.
Source: http://www.w3.org/TR/html5/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes
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How can I get the timezone name in JavaScript?
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You can use this script.
http://pellepim.bitbucket.org/jstz/
Fork or clone repository here.
https://bitbucket.org/pellepim/jstimezonedetect
Once you include the script, you can get the list of timezones in - jstz.olson.timezones variable.
And fo...
send mail from linux terminal in one line [closed]
... SMTP server that you can send email from.
For gmail, for example, follow
http://rtcamp.com/tutorials/linux/ubuntu-postfix-gmail-smtp/
or any other similar tutorial.
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400 vs 422 response to POST of data
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400 Bad Request would now seem to be the best HTTP/1.1 status code for your use case.
At the time of your question (and my original answer), RFC 7231 was not a thing; at which point I objected to 400 Bad Request because RFC 2616 said (with emphasis mine):
The reques...
Auto-reload browser when I save changes to html file, in Chrome?
...not on OSX? Otherwise you could do something like this with applescript:
http://brettterpstra.com/watch-for-file-changes-and-refresh-your-browser-automatically/
There is also a plugin for chrome called "auto refresh plus" where you can specify a reload every x seconds:
https://chrome.google.com/...
How do I get user IP address in django?
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def get_client_ip(request):
x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
if x_forwarded_for:
ip = x_forwarded_for.split(',')[0]
else:
ip = request.META.get('REMOTE_ADDR')
return ip
Make sure you have reverse proxy (if any) configured correctly (...