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RSS订阅原创 多线程信号量的使用
公司业务上写了一个小模块，其中有一个功能是需要等待一个线程执行完一个函数之后，在另一个线程做出反应。之前自己的写法是使用一个循环不断的去监视一个标志值，当标志值变化时候，代表执行完毕。但是这么做的话有一些缺陷，一个是不Sleep的话，那么占用很高的CPU使用率，显然不可行。Sleep的话，则该模块效率提不上来，就算是仅仅1MS，那么模块的速率就降到了一秒100以内了，是不可以被接受的。陷入
2016-05-31 21:15:53
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原创 LeetCode OJ9. Palindrome Number
Determine whether an integer is a palindrome. Do this without extra space.%3 分解出所有元素后放入vector，每个值中间插入一个1，这样所有的都会变成奇数个。然后从中间开始 循环判断是否符合要求class Solution {public: bool isPalindrome(int x)
2016-02-28 19:45:02
210
原创 LeetCode OJ 8.String to Integer (atoi)
Implement atoi to convert a string to an integer.Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input ca
2016-02-28 19:23:49
221
原创 LeetCode OJ 7. Reverse Integer
Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -32137.52% 直接用long来转换，转换后判断是否越界。class Solution {public: int reverse (int x) {
2016-02-28 13:21:03
198
原创 LeetCode OJ 6.ZigZag Conversion
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)P A H NA P L S I
2016-02-28 13:19:57
286
原创 LeetCode OJ 5.Longest Palindromic Substring
Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring.寻找最长回文串有更长
2016-02-28 13:18:03
220
原创 LeetCode OJ 4.Median of Two Sorted Arrays
There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).思路就是两个合并cla
2016-02-28 13:17:05
277
原创 LeetCode OJ 3.Longest Substring Without Repeating Characters
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
2016-02-28 13:07:38
184
原创 LeetCode OJ 2.Add Two Numbers
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link
2016-02-28 13:06:29
230
原创 LeetCode OJ 1. Two Sum
Given an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution.Example:Given nums
2016-02-28 12:59:49
179
原创 C++ primer 初学
基本语言const 把一个变量转换成一个常量，防止被修改。const int buf=512extern 声明 则未初始化 除非初始化 才可被看为定义extern int i=1;引用 实际上对 refval操作，就是对ival操作 refval只是它的另外一个名字int ival=1024;int &refval=ival;typedeftypedef double wages; // wage
2015-04-14 21:53:47
201
支持vs2017的vax插件visual assist x 2214破解
2017-09-29
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