move

问题 I'm having a difficult time with understand + use move semantics in C++. I have an object Variable implements move constructor and move assignment but no copy constructor and assignment. Generally copying a Variable makes no sense and I want to prohibit copying explicitly. class Variable { public: // ctod/dtor things Variable(Variable&&); Variable& operator =(Variable&&); // ... }; The question is what is correct way of returning a Variable from a function? Variable& UserObject:

问题 I am trying to move my agents from one vertex of my road network to another one which the following code. However, I got an error, saying that MOVE-TO expected input to be an agent but got NOBODY instead. If new location is already defined which this code as part of the agentset of slocation , where is the problem? to go ask citizens [start-movement] move end to start-movement let nearest-node min-one-of nodes [distance myself] set slocation nearest-node move-to slocation end to move ask

问题 Given the following code: struct obj { int i; obj() : i(1) {} obj(obj &&other) : i(other.i) {} }; void f() { obj o2(obj(obj(obj{}))); } I expect release builds to only really create one object and never call a move constructor because the result is the same as if my code was executed. Most code is not that simple though, I can think of a few hard to predict side effects that could stop the optimizer from proving the "as if": changes to global or "outside" things in either the move constructor

问题 I am trying to do something similar to this: #include <vector> #include <memory> struct Bar { Bar& doThings() {return *this;} std::unique_ptr<int> m_content; // A non-copyable type }; struct Foo { Foo& append(Bar&& obj) { objects.push_back(std::move(obj)); return *this; } std::vector<Bar> objects; }; int test() { Foo test; test.append(std::move(Bar{}.doThings())) //Ok // Not ok .append(Bar{}.doThings()) ; } error: cannot bind rvalue reference of type Bar&& to lvalue of type Bar Is it possible

问题 i'm having some problems with views. I created my own View (Square) and i want to move any Squares that i put on the screen. With the menu, i can put other Squares on the screen. The thing is, that when the program starts, i have one square on the screen and i can move it. But when i put other squares, i can just move the last one. How can i fix this? public class Square extends View { private float x, y, width, height; private int screenW, screenH; public boolean isInside = false; public int

问题 I want to create a batch file that moves all the files in this directory to its father directory. Like for example if I have a directory " Something " that contains files : ...New Folder/Something And I want to move the files in " Something " to New folder. Is there such a command? Thanks a bunch :) 回答1: Presuming you're talking about Windows batch files, move *.* ..\ should do the trick. Edit: For example, if you opened cmd , you could input: cd C:\New Folder\Something move *.* ..\ which

问题 I have two tables, that share the same definition. I commonly insert new objects into one of these tables, let's call it Table1. From time to time, I want to move one entry from Table1 to the other table (Table2). How can I achieve this using the OpenJPA Framework? The object is clearly bound to one table ... @Entity @Table(name="TRACKING") public class TrackingEntry { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Integer id; @Column(name="LASTNAME") private String lastName;

问题 I'm looking for a jquery slider script that is able to right-left slide while I'm moving my mouse. Anyone knows that kind of script? I want to achieve an effect like this one but it should be scrolled horizontal, not vertical. 回答1: Do you mean something like this. It's a very basic thing that uses the jQuery UI Slider. I attach a handler to the mousemove event that just calculates what the value should be for the slider (based on the value of the mouse coordinates). $(function() { var range =

问题 Good afternoon, I'm trying to make my turtles to move between a set of 4 blue patches. I can make them get to those patches but after that they just stay there, and what I need is to them continuously move (in order) to the next blue patch to their right. I don't know how to do it. This is the section of the code I'm talking about: to move-turtles ask turtles [while [[pcolor] of patch-here != blue] [ face min-one-of patches with [pcolor = blue ] [ distance myself ] forward 1 ] ] tick end By

问题 I use File.Move to move large files around 2GB from a directory to another directory.The desitnation folder is monitored and if there is any new file, it will be uploaded to CDN. But we experienced some partial file upload to CDN which means, the respective file was uploaded to CDN while the same file was moving from source to destination directory. So, I need to know whether File.Move locks the file destination folder till the file is completed moved? 回答1: What you can do to avoid partial