move

Which rules determine whether an object is trivially copyable

由 喜夏-厌秋 提交于 2020-01-10 10:00:23
问题 With the introduction of c++11, trivially copyableness has gotten quite relevant. Most notably in the use of 'std::atomic'. The basics are quite simple. A class foo is trivially copyable if: foo* src = new foo(); foo* dest = malloc(sizeof(foo)); memcpy(dest, src, sizeof(foo)); Has the same effect as: foo* src = new foo(); foo* dest = new foo(src); So an object where copying the memory will have the same effect as a copy constructor. However there, of course, is a catch. There's not only copy

To support move semantics, should function parameters be taken by unique_ptr, by value, or by rvalue?

由 不问归期 提交于 2020-01-09 16:56:14
问题 One of my function takes a vector as a parameter and stores it as a member variable. I am using const reference to a vector as described below. class Test { public: void someFunction(const std::vector<string>& items) { m_items = items; } private: std::vector<string> m_items; }; However, sometimes items contains a large number of strings, so I'd like to add a function (or replace the function with a new one) that supports move semantics. I am thinking of several approaches, but I'm not sure

To support move semantics, should function parameters be taken by unique_ptr, by value, or by rvalue?

由 梦想的初衷 提交于 2020-01-09 16:52:08
问题 One of my function takes a vector as a parameter and stores it as a member variable. I am using const reference to a vector as described below. class Test { public: void someFunction(const std::vector<string>& items) { m_items = items; } private: std::vector<string> m_items; }; However, sometimes items contains a large number of strings, so I'd like to add a function (or replace the function with a new one) that supports move semantics. I am thinking of several approaches, but I'm not sure

Visual C#: Move multiple files with the same extensions into another directory

由 ╄→гoц情女王★ 提交于 2020-01-09 07:48:07
问题 guys. I've got a problem I can't solve: I have a 2 folders I choose with folderBrowserDialog and tons of files in source directory I need to move to the target directory. But, I have only to move files with a specific extension like .txt or any other extension I can get from textbox. So how can I do it? 回答1: First get all the files with specified extension using Directory.GetFiles() and then iterate through each files in the list and move them to target directory. //Assume user types .txt

Python之汉诺塔问题及python安全

由 一曲冷凌霜 提交于 2020-01-07 12:08:32
Python之汉诺塔问题 今天学习了一下汉诺塔问题，像了许久啊！！脑袋不太OK！记得上次看到汉诺塔是我在看电影的时候，电影场景里给大猩猩测试智商的。。。。 这里使用的是Python3编写的代码，毕竟大家都知道2020年的1月1日Python2已经正式退休了。下面是Python3的时代了。 发现规律后就会意识到这个就是一个递归函数，挺明显的。 代码如下： ''' 下面是汉诺塔问题不同的圆盘个数实现任务的次数规律： n=1 a=1 f(x) = 1 n=2 a=3 f(2) = 2*f(1)+1 n=3 a=7 f(3) = 2*f(2)+1 n=4 a=15 f(4) = 2*f(3)+1 ... ... f(n) = 2*f(n-1)+1 ''' def Move ( n , a , b , c ) : if n == 1 : print ( a , '--->' , c ) #如果只有一个圆盘就直接把它从A拿到C，并且结束程序。 return 0 else : #不是一个圆盘那么就要对n-1个圆盘从A移到B Move ( n - 1 , a , c , b ) print ( a , '--->' , c ) #把最底下的那个从A移动到C Move ( n - 1 , b , a , c ) #最后把在B的n-1个圆盘移动到C number = input ( '请输入圆盘的个数

Batch file to split text file into multiple files in same directory on Win Svr 2012 using NO 3rd Party Apps [closed]

由 安稳与你 提交于 2020-01-07 02:51:27
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . I am hoping the wonderful experts here can assist me with my problem. I have found this site extremely useful in the past in solving other issues I have had but I have searched this site and tried all the answers similar to my problem but cant seem to get any of them to work for

Why wont this move effect work on my sprites when the fade effect does?

由 ╄→гoц情女王★ 提交于 2020-01-06 17:56:02
问题 Could someone please explain why this doesn't want to work? It's a bit of decoration to go behind a logo. When the dMove var is commented out I get the appropriate line of squares fading in and out at random spots along the x = 78 axis, but when introduced nothing appears at all... private var floatBG:UIComponent = new UIComponent(); private function addDP(event:TimerEvent):void{ var dY:Number = 5+Math.ceil(Math.random()*60); var dSize:Number = Math.ceil(Math.random()*12); var dAlpha:Number =

How to move the card view rest to the next card view in recyclerView in android

由 丶灬走出姿态 提交于 2020-01-06 08:08:44
问题 I am creating an application kitchen display regarding restaurant automation. When creating the order it is added to the Recycler view can scroll horizontally. Item added to each Cardview in each order and if more item includes I need to the rest into the next column. image is shown it (Each order can't the scroll) Are there any suggestions or method to do this? 回答1: There are LayoutManager for RecyclerView which handle the task of laying out the content in particular way. For example, if you

SetWindowPos for a specific window

由 被刻印的时光 ゝ 提交于 2020-01-06 07:56:39
问题 I have [DllImport("user32.dll", EntryPoint = "SetWindowPos")] public static extern IntPtr SetWindowPos(string hWnd, int hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags); My issue is I want to be able to move a specific window based on the text inside of my label. private void button1_Click(object sender, EventArgs e) { const short SWP_NOSIZE = 1; const short SWP_NOZORDER = 0X4; const int SWP_SHOWWINDOW = 0x0040; Process[] processes = Process.GetProcesses(); foreach (var process in

How to create batch file that move files from sub-folder up one level renaming duplicates?

由 百般思念 提交于 2020-01-06 07:19:22
问题 I already have a batch file that I can drop in any SHOW_NAME directory and it will move files from a sub-folder to its SEASON parent directory. For example: F:\TV_SHOWS\SHOW_NAME\SEASON1\TITLE_EP1\title_episode1.mkv F:\TV_SHOWS\SHOW_NAME\SEASON1\TITLE_EP2\title_episode2.mkv F:\TV_SHOWS\SHOW_NAME\SEASON1\TITLE_EP3\title_episode3.mkv F:\TV_SHOWS\SHOW_NAME\SEASON1\title_episode3.mkv When it moves all files to the parent folder ( SEASON1 ) the " title_episode3.mkv " is a duplicate and overwrites
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