treeshy-CSDN博客

原创 How to Build ARPACK in Windows10 with Microsoft Visual Studio 2015

There are some websites that I had used:http://www.cnblogs.com/hellraider/archive/2012/09/29/2707231.htmlhttp://www.recheliu.org/memo/buildarpackonwindowsforvisualstudiostep 1: Download ming

2017-03-21 22:17:28 899 1

原创机器学习 *** 初识流形

最近在学习一个机器学校相关的算法，需要用到流形这个知识，无奈我也不是很清楚这是啥，花了一点时间初步的认识了一下。下面写一下自己对流形这个概念的认识吧～如果有哪里不对希望有人能帮我指出来，多谢～流形：英文叫Manifold，many fold，许多面片的叠加。流形在维基百科上的定义是：局部具有欧几里得空间性质的空间哦。。。酱紫的哦，但是啥是欧几里得空间性质？？？

2017-02-28 18:58:15 1211

原创机器学习 *** 模块以及费用函数

对于数据集而言，想要拟合出该数据集对应的函数h时，需要用一个花费函数来衡量函数h的准确程度。该花费函数可以写作：

2017-02-28 09:26:34 561

原创机器学习 *** 介绍

最近开始准备为研究生方向做准备了，同时因为学校这边项目的原因需要学习机器学习相关的算法，所以在coursera上开始学习机器学习相关内容。Tom Mitchell给了一个机器学习的定义："A computer program is said to learn from experience E with respect to some class of tasks T and perfor

2017-02-27 23:32:53 378

原创 Tomcat+Eclipse+Ubuntu ××× Servlet.service() for servlet [jsp] in context with path [] threw exceptio

报错如下： Servlet.service() for servlet [jsp] in context with path [] threw exception [java.lang.IllegalStateException: No output folder] with root causejava.lang.IllegalStateException: No output folder

2016-10-02 23:23:56 8992

原创 Android *** transition不起作用

写acitivity之间的动态效果的时候发现没有动态效果。。。于是发现自己忘了加ActivityOptions transitionActivityOptions = ActivityOptions.makeSceneTransitionAnimation(MainActivity.this, sharedView, transitionName);。。。。以及。。。a

2016-09-13 21:01:59 1539

原创 Android *** Error: cannot resolve symbol bindingadapter

今天开始使用bindingadapter注释的时候却发现怎么也导不了import android.databinding.BindingAdapter;BindingAdapter始终显示红色错误提示，弄了一个多小时才发现自己没有在主module的build.gradle下配置好，参考这篇官方文档：https://developer.android.com/topic/libraries/

2016-09-13 12:49:41 2059

原创 Android *** android studio Error:Failed to resolve: com.android.support:appcompat-v7:23.+

下午装了android studio，然后新建一个helloworld的project却报了这么一个错误：android studio Error:Failed to resolve: com.android.support:appcompat-v7:23.+网上没有什么好的答案，后来我在sdk manager里面把extras里面的android support repository下载之后

2016-09-05 19:41:08 5765 1

原创静态页面下，页面编码为gb2312，但是源代码中出现大量/uxxxx的解决方法

昨天爬一个网站的时候发现该网站charset为gb2312，但是网页下方出现大量的/uXXX类似的字符串而且里面还穿插了很多的\n\r类似的字符串，一直搜也没搜到，后来发现是因为该网站的那部分使用了json保存数据。所以直接爬下json的部分，然后用pathon的json块处理json就可以了！

2016-08-03 15:34:03 516

原创 Python *** 爬下糗事百科数据

刚开始学习python，目前只是将部分数据爬下然后记录到txt文件中。代码在github上挂着，地址：https://github.com/treeshy/pythondemo/blob/master/spider_qiushibaike.py

2016-07-17 17:16:06 287

原创 WINAPI *** SAL

翻译与节选与理解选自msdn。https://msdn.microsoft.com/en-us/library/hh916383.aspxHeader AnnotationSAL 2.0 注释What Is SAL and Why Should You Use It?Simply stated, SAL is an inexpensive way t

2016-05-16 11:32:41 575

原创 WINAPI *** _in_ and _out_ and _in_opt_

#define __in #define __out#define __in_opt翻译来自stackoverflow。以上来自于SAL注释语言，（Source-code Annotation Language）。SAL annotations are useful for two things:Static analysis through PREf

2016-05-16 10:53:34 693

原创生活 *** 五月记

8号之前把app的界面优化了一下，没有之前那么难看了。9号开始看thinking in java。希望这个月内能看完。

2016-05-09 23:56:58 237

转载 Android *** Drawable、Bitmap、Canvas、Paint之间区别

1.基本介绍：Bitmap - 称作位图，一般位图的文件格式后缀为bmp，当然编码器也有很多如RGB565、RGB888。作为一种逐像素的显示对象执行效率高，但是缺点也很明显存储效率低。我们理解为一种存储对象比较好。Drawable - 作为Android平台下通用的图形对象，它可以装载常用格式的图像，比如GIF、PNG、JPG，当然也支持BMP，当然还提供一些高级的可视化对象，比如渐变、

2016-05-08 11:14:38 289

原创 Android *** android-doc阅读《进程与线程》

青色为引用doc内容，黑色是自己的感受～如果某个应用程序组件是第一次被启动，且这时应用程序也没有其他组件在运行，则Android系统会为应用程序创建一个包含单个线程的linux进程。默认情况下，同一个应用程序的所有组件都运行在同一个进程和线程里（叫做“main”主线程）。如果组件启动时，已经存在应用程序的进程了（因为应用程序的其它组件已经在运行了），则此组件会在已有的进程和线程中启动运

2016-05-03 09:38:27 269

原创 LeetCode *** 344. Reverse String

题目：Write a function that takes a string as input and returns the string reversed.Example:Given s = "hello", return "olleh". 分析：代码：class Solution {public: string reverseStrin

2016-04-27 22:20:30 284

原创 LeetCode *** 345. Reverse Vowels of a String

题目：Write a function that takes a string as input and reverse only the vowels of a string.Example 1:Given s = "hello", return "holle". Example 2:Given s = "leetcode", return "leotcede".

2016-04-27 22:19:34 328

原创 LeetCode *** 166. Fraction to Recurring Decimal

题目：Given two integers representing the numerator and denominator of a fraction, return the fraction in string format.If the fractional part is repeating, enclose the repeating part in parenthese

2016-04-27 22:17:11 258

原创 LeetCode *** 29. Divide Two Integers（binary search）

题目：Divide two integers without using multiplication, division and mod operator. If it is overflow, return MAX_INT. 分析：代码：class Solution {public: int divide(int dividend, int divi

2016-04-27 22:16:07 430

原创 LeetCode *** 344. Reverse String

题目：Write a function that takes a string as input and returns the string reversed.Example: Given s = "hello", return "olleh".分析：代码：class Solution {public: string reverseString(

2016-04-27 19:05:29 202

原创 LeetCode *** 151. Reverse Words in a String

题目：Given an input string, reverse the string word by word. For example,Given s = "the sky is blue",return "blue is sky the". 分析：代码：class Solution {public: void reverseWords(s

2016-04-27 17:00:23 264

原创 LeetCode *** 130. Surrounded Regions

题目：Given a 2D board containing 'X' and 'O', capture all regions surrounded by'X'.A region is captured by flipping all 'O's into 'X's in that surrounded region.For example,X X X XX O O

2016-04-27 15:38:11 201

原创 LeetCode *** 307. Range Sum Query - Mutable (Binary Indexed Trees)

题目：Given an integer array nums, find the sum of the elements between indicesi and j (i ≤ j), inclusive.The update(i, val) function modifies nums by updating the element at indexi to val.Ex

2016-04-27 10:34:32 258

原创 LeetCode *** 91. Decode Ways

题目：A message containing letters from A-Z is being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an encoded message containing digits, determine the tot

2016-04-27 10:33:49 200

原创 LeetCode *** 220. Contains Duplicate III　（set::lower_bound）

题目：Given an array of integers, find out whether there are two distinct indices i and j in the array such that the difference between nums[i] andnums[j] is at most t and the difference between i

2016-04-26 22:54:03 208

原创 LeetCode *** 127. Word Ladder（BFS）

题目：Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence frombeginWord to endWord, such that: Only one letter can be chan

2016-04-26 20:58:47 316

原创 LeetCode *** 341. Flatten Nested List Iterator（审题审题！！）

题目：Given a nested list of integers, implement an iterator to flatten it.Each element is either an integer, or a list -- whose elements may also be integers or other lists.Example 1:Given the

2016-04-26 19:46:46 316

原创 LeetCode *** 179. Largest Number （sort的使用。。。）

题目：Given a list of non negative integers, arrange them such that they form the largest number.For example, given [3, 30, 34, 5, 9], the largest formed number is9534330.Note: The result may b

2016-04-26 19:35:22 223

原创 LeetCode *** 211. Add and Search Word - Data structure design（字典树）

题目：Design a data structure that supports the following two operations: void addWord(word)bool search(word)search(word) can search a literal word or a regular expression string containing onl

2016-04-26 09:07:49 271

原创 LeetCode *** 98. Validate Binary Search Tree

题目：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 nodes with keys less than the node's ke

2016-04-25 22:22:12 171

原创 LeetCode *** 210. Course Schedule II

题目：There are a total of n courses you have to take, labeled from 0 ton - 1.Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed a

2016-04-25 20:34:42 225

原创 LeetCode *** 3. Longest Substring Without Repeating Characters

题目：Given a string, find the length of the longest substring without repeating characters.Examples:Given "abcabcbb", the answer is "abc", which the length is 3.Given "bbbbb", the answer is "b

2016-04-25 20:07:48 197

原创 LeetCode *** 71. Simplify Path （getline的使用）

题目：Given an absolute path for a file (Unix-style), simplify it.For example,path = "/home/", => "/home"path = "/a/./b/../../c/", => "/c"分析：代码：class Solution {public: string

2016-04-25 19:16:30 217

原创 LeetCode *** 304. Range Sum Query 2D - Immutable

题目：Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1,col1) and lower right corner (row2, col2).The above rectangle (with the

2016-04-25 17:06:01 179

原创 LeetCode *** 324. Wiggle Sort II （virtual indexing）

题目：Given an unsorted array nums, reorder it such that nums[0] nums[2] .Example:(1) Given nums = [1, 5, 1, 1, 6, 4], one possible answer is [1, 4, 1, 5, 1, 6].(2) Given nums = [1, 3, 2, 2,

2016-04-25 16:20:59 697

原创 LeetCode *** 152. Maximum Product Subarray

题目：Find the contiguous subarray within an array (containing at least one number) which has the largest product.For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the lar

2016-04-25 14:58:32 182

原创 LeetCode *** 61. Rotate List

题目：Given a list, rotate the list to the right by k places, where k is non-negative.For example:Given 1->2->3->4->5->NULL and k = 2,return 4->5->1->2->3->NULL.分析：代码：/** * Defin

2016-04-25 10:30:56 203

原创 LeetCode *** 143. Reorder List

题目：Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering the nodes' values.For example,Given {1,2,3,4}, reorder it

2016-04-24 23:17:55 173

原创 LeetCode *** 79. Word Search

题目：Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertic

2016-04-24 22:08:58 162

原创 LeetCode *** 43. Multiply Strings 

题目：Given two numbers represented as strings, return multiplication of the numbers as a string.Note:The numbers can be arbitrarily large and are non-negative.Converting the input string to

2016-04-24 20:37:08 173

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