2016年4月23日
摘要: Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the leng 阅读全文
posted @ 2016-04-23 10:48 zehua_tongxini 阅读(127) 评论(0) 推荐(0)
摘要: Validate if a given string is numeric. Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => false"2e10" => true 解决方案: 注:e9 -> false ; 1. -> 阅读全文
posted @ 2016-04-23 08:29 zehua_tongxini 阅读(289) 评论(0) 推荐(0)