#!usr/bin/env python
#encoding:utf-8
 
'''
__Author__:沂水寒城
功能：求解字符串集的最长公共前缀
'''
 
def find_longest_prefix(str_list):
 '''
 求解字符串集的最长公共前缀
 '''
 str_list.sort(lambda x,y:cmp(len(x),len(y)))
 shortest_str=str_list[0]
 print str_list
 max_prefix=len(shortest_str)
 flag=0
 for i in range(max_prefix):
  for one_str in str_list:
   if one_str[i]!=shortest_str[i]:
    return shortest_str[:i]
    break
 return shortest_str
 
 
if __name__ == '__main__':
 str_list1=['abcdef','abcdekljjh','abcdelopqwe','abcdj']
 str_list2=['abcdef','abcdekljjh','abcdelopqwe','abcde']
 print 'str_list1--->', find_longest_prefix(str_list1)
 print 'str_list2--->', find_longest_prefix(str_list2)

str_list1---> ['abcdj', 'abcdef', 'abcdekljjh', 'abcdelopqwe']
abcd
str_list2---> ['abcde', 'abcdef', 'abcdekljjh', 'abcdelopqwe']
abcde
[Finished in 0.3s]