Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example,
"A man, a plan, a canal: Panama" is
a palindrome.
"race a car" is no...
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其他好文 时间：
2014-06-10 18:36:29
阅读次数：
193
Given a string s consists of upper/lower-case alphabets and empty space characters '
', return the length of last word in the string.
If the last word does not exist, return 0.
Note: A word is...
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其他好文 时间：
2014-06-10 10:52:03
阅读次数：
180
一、代码实现如下（主程序代码，其他include代码见各个功能函数中）responseMsg();//$wechatObj->valid();class
wechatCallbackapiTest{ public function valid() { $echoStr = ...
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微信 时间：
2014-06-08 20:54:23
阅读次数：
704
字符串和字符A string is an ordered collection of
characters, such as "hello, world" or "albatross". Swift strings are represented
by the String type, which ...
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其他好文 时间：
2014-06-08 19:43:21
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247
下面的代码片段输出是什么？为什么？
char *ptr;
if((ptr = (char *)malloc(0))==NULL)
puts("Got a null pointer");
else
puts("Got a valid pointer");
解析：......故意把0值传给了函数malloc，得到了一个合法的指针，这就是上面的代码，该代码的输出是"Got ...
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其他好文 时间：
2014-06-08 17:11:28
阅读次数：
285
题目：For example,"A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome.
解题思路：验证一个字符串是否是回文字符串。首先看看wiki上对于回文的解释：回文，亦称回环，是正读反读都能读通的句子，亦有将文字排列成圆圈者，Famous examples include "Amore, Roma", "A man, a plan, a canal: Panama" and "No 'x' in...
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其他好文 时间：
2014-06-08 16:30:29
阅读次数：
235
Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without
repeating letters for "abcabcbb" is "abc", which the length is 3. Fo...
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其他好文 时间：
2014-06-08 16:27:47
阅读次数：
231
Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified.
You should pack your words in a greedy approach; that i...
分类：
编程语言 时间：
2014-06-08 15:25:00
阅读次数：
282
题目
Given a string containing only digits, restore it by returning all possible valid IP address combinations.
For example:
Given "25525511135",
return ["255.255.11.135", "255.255.111.3...
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其他好文 时间：
2014-06-08 10:37:47
阅读次数：
273
题目：Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "bbbbb" the longest substring is "b", with the length...
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其他好文 时间：
2014-06-08 03:06:52
阅读次数：
221
