Associative Arrays in Bash Scripts

http://stackoverflow.com/questions/688849/associative-arrays-in-shell-scripts

http://www.artificialworlds.net/blog/2012/10/17/bash-associative-array-examples/

http://www.gnu.org/software/bash/manual/html_node/Arrays.html

http://stackoverflow.com/questions/6660010/bash-how-to-assign-an-associative-array-to-another-variable-name-e-g-rename-t

bash array的寫法範例

http://go-linux.blogspot.tw/2007/03/basharray.html

http://www.cyberciti.biz/faq/finding-bash-shell-array-length-elements/

http://www.thegeekstuff.com/2010/06/bash-array-tutorial/

http://stackoverflow.com/questions/688849/associative-arrays-in-shell-scripts