02 2015 档案
摘要：Given a string containing only digits, restore it by returning all possible valid IP address combinations. Example: Input: "25525511135" Output: ["255
阅读全文
摘要：Qt中的QDialog类是用来生成对话框的类，QFileDialog 类是QDialog的衍生类，主要用来生成打开文件，或是打开文件目录的对话框，或者是保存文件的对话框，下面我们一一来看代码：1. Load File Dialog/** * Button event for Load File bu...
阅读全文
摘要：Qt中QCheckBox的按键响应如下，其中checkbox为对象名：void YourClass::on_checkbox_toggled(bool state) { // Do something here}
阅读全文
摘要：http://www.zcool.com.cn/tosearch.do?page=4&world=%E6%9A%82%E5%81%9C&cateType=104&subcateType=0&channel=0&other=0&sort=0&uid=0&time=0&limit=10&recommen...
阅读全文
摘要：Qt中的QTabWiget 类提供了一个标签控件，但是这个控件默认初始化的颜色是白色，和原窗口的颜色不同，看起来非常的违和，所以我们希望将其的背景颜色设为当前窗口的背景颜色。我们所要做的就是先将应用程序窗口的背景颜色取出来，然后再赋给QTabWiget 类的每个标签，比如说我们有tab1和tab2两
阅读全文
摘要：用OpenCV同时显示两个摄像头的内容的代码如下：#include #include #include #include #include #include using namespace std;int _tmain(int argc, _TCHAR* argv[]) { CvCapture...
阅读全文
摘要：在做项目中，我们经常需要获取系统的当前时间，那么如何获取呢，参见下面的代码：/* asctime example */#include /* printf */#include /* time_t, struct tm, time, localtime, asctime *...
阅读全文
摘要：Given an integer n, generate all structurally unique BST's (binary search trees) that store values 1 ... n. Example: Input: 3 Output: [ [1,null,3,2],
阅读全文
摘要：:-) smile:-] polite smile:-( frown:-[ another frown:-/ or :-\ skepticism, annoyance, or a slight frown:-| indecision, deadpan, or indifference; also o...
阅读全文
摘要：Qt中的信号槽系统是不同类中间传递数据的神器，如果连接父子空间之间的信号槽很重要，在父类中实例化子类的时候一定要注意将父类连上，不然信号槽无法使用，比如若子类是个对话框Dialog类，一定不要忘了加thisQtClass *qc = new QtClass(this);qc->exec();然后如果...
阅读全文
摘要：Given n, how many structurally unique BST's (binary search trees) that store values 1 ... n? Example: Input: 3 Output: 5 Explanation: Given n = 3, the
阅读全文
摘要：Qt中的Label标签控件的作用绝不仅仅限于显示静态文本，其实它的功能很强大，由于其有setPixmap（）成员函数，故而可以当显示图片窗口使用，而且还可以实时显示摄像头捕获的图片，然后它对鼠标事件的支持却没有QWidget那样强大，很多时候我们想要QLabel捕获鼠标单击或双击的事件，它本身无法实
阅读全文
摘要：Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Example 2: Note: Try to come up as many solutions as you
阅读全文
摘要：Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2. Example 1: Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac" Output:
阅读全文
摘要：Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only
阅读全文
摘要：Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Example 1: Input: [1,3,null,null,2
阅读全文
摘要：Given a binary tree, return the inorder traversal of its nodes' values. Example: Input: [1,null,2,3] 1 \ 2 / 3 Output: [1,3,2] Follow up: Recursive so
阅读全文
摘要：Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and
阅读全文
摘要：Ctrl-CCopyCtrl-XCutCtrl-VPasteCtrl-ZUndoCtrl-YRedoCtrl-ASelect AllCtrl-FLaunch Find DialogCtrl-HLaunch Find / Replace DialogCtrl-DDuplicate Current ...
阅读全文
摘要：在使用Qt和OpenCV编程时，对于它们各自的图像类QImage和IplImage难以避免的需要互相之间的转换，下面我们就来看它们的相互转换。1. QImage 转换为 IplImageIplImage *QImageToIplImage(const QImage * qImage){ int...
阅读全文
摘要：Given preorder and inorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. For example,
阅读全文
摘要：在Qt中经常需要弹出窗口，QMessageBox可以实现此功能，一共有三种窗口，information, question, 和 warning，critical, about分别对应感叹号，问号和叉号等等,使用方法很简单，一共有三个参数，第一个是父窗口句柄，剩下两个分别为窗口名称和显示内容，显示内...
阅读全文
摘要：Qt5从Qt4升级后，很多原来Qt4中定义的函数或者变量由于种种原因在Qt5中被遗弃，所以用Qt5来编译Qt4的一些工程项目时，难以避免的会需要修改一些地方，下面就罗列一些我遇到的一些需要修改的地方：- Qt5中UnicodeUTF8不再是QCoreApplication的一个成员，所以下面的代码需...
阅读全文
摘要：Go to Linker -> General -> Additional LIbrary Directories:qtmaind.libQt5Cored.libQt5Guid.libQt5Widgetsd.libQt5Multimediad.libQt5MultimediaWidgetsd.lib
阅读全文
摘要：Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. For example,
阅读全文
摘要：Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple
阅读全文
摘要：Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced bina
阅读全文
摘要：Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is d
阅读全文
摘要：1. leetcodehttp://leetcode.com/2. careeruphttp://www.careercup.com/http://hawstein.com/posts/ctci-solutions-contents.html3. glassdoorhttp://www.glassd...
阅读全文
摘要：Given two strings s and t, return the number of distinct subsequences of s which equals t. The test cases are generated so that the answer fits on a 3
阅读全文
摘要：Given a binary tree, flatten it to a linked list in-place. For example,Given The flattened tree should look like: click to show hints. Hints: If you n
阅读全文
摘要：3DSlicer, a free open source software for visualization and medical image computingAcetoneISO：镜像文件挂载软件Adobe Photoshop Album, an image organizing appli...
阅读全文
摘要：Given a binary tree struct Node { int val; Node *left; Node *right; Node *next; } Populate each next pointer to point to its next right node. If there
阅读全文
摘要：Qt中的表单控件QListWidget类提供了许多信号函数，可以和用户交互，其中有个currentRowChanged ( int currentRow ) 是检测当前选中行是否发生了改变，如果改变了，该信号函数被触发。void QListWidget::currentRowChanged ( in...
阅读全文
摘要：这三个类相互有关联，但是有不尽相同，首先从名字上看，QDir 和 QDirIterator 是针对于文件目录的，也就是文件夹，我们知道，对于一个文件夹，可以包含很多文件，也可以包含其他文件夹，通常是一个树的结构。文件夹里还可以包含符号链接，符号链接是指向其他文件或文件夹的一种链接，和Windows系...
阅读全文
摘要：You are given a perfect binary tree where all leaves are on the same level, and every parent has two children. The binary tree has the following defin
阅读全文
摘要：在Qt中添加按钮或表格控件时需要添加其按键响应，一般来说有两种方法，一种是直接实现其响应函数，第二种是自己写一个响应函数，然后用Qt的信号槽将它们连接起来。愚以为第一种方法更为简单一些。声明这些控件：QPushButton *pbutton;QListWidget *lwidget;然后实现它们的响...
阅读全文
摘要：Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example, given the fo
阅读全文
摘要：Qt 支持的图片格式如下：FormatDescriptionQt's supportBMPWindows BitmapRead/writeGIFGraphic Interchange Format (optional)ReadJPGJoint Photographic Experts GroupRe...
阅读全文
摘要：初学Qt的人会经常搞不清这三个图像类QGrphicsView, QGraphicsScene 和 QGraphicsItem，它们到底有什么区别呢？QGrphicsView类实际上是为QGraphicsScene类的内容提空了一个控件，它在一个可滑动视图空间内可视化QGraphicsScene的内容...
阅读全文
摘要：The DNA sequence is composed of a series of nucleotides abbreviated as 'A', 'C', 'G', and 'T'. For example, "ACGAATTCCG" is a DNA sequence. When study
阅读全文
摘要：Qter开源社区http://www.qter.org/[Qt教程]， 作者yafeilinux[视频]QT学习之路：从入门到精通 《C++ Qt 编程视频教程》
阅读全文
摘要：Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple
阅读全文
摘要：Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple
阅读全文
摘要：Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction
阅读全文
摘要：Given a non-empty binary tree, find the maximum path sum. For this problem, a path is defined as any sequence of nodes from some starting node to any
阅读全文
摘要：Canvas APIBasic LayoutsCamera ExampleVideo Widget ExampleImage Viewer ExamplePart 6 - Loading and SavingShow in Finder / Show in ExplorerItem Views Ex...
阅读全文
摘要：ActiveQt ExamplesUsing ActiveX from Qt applications.Animation Framework ExamplesDoing animations with Qt.Animated TilesApplication ChooserEasing Curve...
阅读全文
摘要：http://blog.sina.com.cn/s/blog_a6fb6cc90101gynd.html 用了这么久的Qt，IDE一直都是VS与Creator并用（实际开发以VS为主），至于哪个更好这里不发表看法，各有所长，而且也因人而异，萝卜青菜，各有所爱。 Qt5发布很久之后，才把版本从之前的...
阅读全文
摘要：GTK+2.0 中的容器控件与布局技巧GTK+图形化应用程序开发学习笔记（一）—概述
阅读全文
摘要：https://developer.gnome.org/gtkmm-tutorial/unstable/index.html.zh_CN1. 序言1.1. 本书 1.2. gtkmm 2. 安装2.1. 依赖关系 2.2. Unix 和 Linux 2.3. Microsoft Windows 3....
阅读全文
摘要：CvMat:typedef struct CvMat{ int type; int step; /* for internal use only */ int* refcount; int hdr_refcount; union { uchar...
阅读全文
摘要：Given an unsorted array of integers, find the length of the longest consecutive elements sequence. Your algorithm should run in O(n) complexity. Examp
阅读全文
摘要：原文地址： http://blog.csdn.net/holybin/article/details/17711013在OpenCV中Mat、CvMat和IplImage类型都可以代表和显示图像。 IplImage由CvMat派生，而CvMat由CvArr派生即CvArr -> CvMat -> I...
阅读全文
摘要：Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the root-to-leaf path 1->2->3 whic
阅读全文
摘要：Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning
阅读全文
摘要：Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. A palindro
阅读全文
摘要：多行注释：VS2010: /NotePad++: Ctrl QXcode: CMMND /回到光标所在之前位置VS2010: Ctrl +/-关闭当前页：VS2010: 鼠标中键NotePad: Ctrl W选中当前词：VS2010: ...
阅读全文
摘要：Given a reference of a node in a connected undirected graph, return a deep copy (clone) of the graph. Each node in the graph contains a val (int) and
阅读全文
摘要：刷题必备书籍：Cracking the Coding Interview: 150 Programming Questions and Solutions简历：The Google Resume: How to Prepare for a Career and Land a Job at Apple...
阅读全文
摘要：There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it cost
阅读全文
