http://www.nowamagic.net/javascript/javascript_ShowCity.php
http://news.cnblogs.com/n/196781/
http://readwrite.com/2012/01/26/infographic-php-vs-python-vs-r#awesm=~orfwcKUmNkKB1x
http://redmonk.com/sogrady/2013/07/25/language-rankings-6-13/
http://www.aqee.net/why-every-programmer-should-learn-python-or-ruby/
https://github.com/JacksonTian