swap

Staying away from virtual memory in Windows\\C++

由 无人久伴 提交于 2019-12-08 18:46:29
I'm writing a performance critical application where its essential to store as much data as possible in the physical memory before dumping to disc. I can use ::GlobalMemoryStatusEx(...) and ::GetProcessMemoryInfo(...) to find out what percentage of physical memory is reserved\free and how much memory my current process handles. Using this data I can make sure to dump when ~90% of the physical memory is in use or ~90 of the maximum of 2GB per application limit is hit. However, I would like a method for simply recieving how many bytes are actually left before the system will start using the

Why swapping two values based on pointers don't work outside function scope?

由 和自甴很熟 提交于 2019-12-08 17:34:29
问题 I haven't programmed in C++ for a number of years, so I decided to refresh my memories on pointers. In the classic example of swapping between two numbers, the example is void swapPointersClassic(double *num1, double *num2) { double temp; temp = *num1; *num1 = *num2; *num2 = temp; } This allows us to make function call like swapPointersClassic(&foo, &bar); and because we pass in the memory addresses of both variables foo and bar, the function will retrieve the values and do the swap. But I

Swap two elements from list with specified indices

由 a 夏天 提交于 2019-12-08 07:24:38
问题 I need to swap two elements in list with specified indices using predicate: swap(List, index1, index2). I tried this way: change_value([X|List], 0, Y, [Y|List2]) :- copy_rest([X|List], List2). change_value([], P, Y, []). change_value([X|List], Pos, Y, [X|List2]) :- X \== Y, Pos > 0, NewPos is Pos - 1, change_value(List, NewPos, Y, List2). copy_rest([], []). copy_rest([X|List], [X|List2]) :- copy_rest(List, List2). Is there any better solution? Thank you very much! 回答1: No need to write

Javascript check if list is sorted after one swap

由 眉间皱痕 提交于 2019-12-08 07:24:33
问题 I want to check if a list can be sorted by performing at most one swap operation, and I want to return true if it does. Otherwise, I want to return false . For example, the input A = [1,2,3,4,5] should result in true because it is already sorted. A = [1,2,5,4,3] should result in true because with one swap, involving 5 and 3, the list is sorted. A = [1,2,5,3,4] should result in false because it requires more than one swap to sort. My code is below. It returns true if A is already sorted, but

How to swap two custom cells with one another in tableview?

由 廉价感情. 提交于 2019-12-08 06:32:15
问题 I have implemented two custom cells in the tableview.Now I want to replace these two custom cells with one another. How to achieve this? 回答1: Implement following tableview methods and write your code in it func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool { // return boolean value for a specific or all cells, you want to enable movement } func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) { //

What's a reason to provide a swap() for the user defined type?

由 十年热恋 提交于 2019-12-08 05:24:37
问题 For example, I have a class which manages a POSIX fd: class remote_connection: { public: explicit remote_connection( int socket_fd ) : socket_fd(socket_fd) {} ~remote_connection() { close( socket_fd); } /* no copy semantic */ remote_connection( const remote_connection& other ) = delete; remote_connection& operator=( const remote_connection& rhs ) = delete; remote_connection( remote_connection&& other ) { socket_fd = other.socket_fd; other.socket_fd = -1; } remote_connection& operator=( remote

Swap the pointers of two arrays in a function [duplicate]

由 混江龙づ霸主 提交于 2019-12-08 04:00:26
问题 This question already has answers here : changing pointers in functions, c (4 answers) Closed 5 years ago . I'm writing a mergesort without the copy part into an extra temp array. For this reason, I create an auxiliary array aux int * aux aux = (int *) calloc(n, sizeof(int)); where n is the size of the array. In the function merge, I want to swap both arrays at the end by using their pointer to continue with my algorithm. But if I swap the pointers, and print them to console, I got weird

Programmatically swap two JPanels in JFrame

由 一曲冷凌霜 提交于 2019-12-08 01:42:57
问题 I am trying to accomplish the above functionality, and am having little success. I am using GridLayout with 2 columns and 2 rows to show the user a puzzle-like game, where there are 4 (200x200 pixel) JPanels (3 colored, 1 default bgColor) which fill the whole contentPane. Clicking on a colored panel resolves in an assessment if the panel is next to the gray panel. If so, they should swap. I have accomplished every step to the last one, where they swap. Here's the code: public class MainClass

Swap values and indexes of a vector

由 夙愿已清 提交于 2019-12-08 01:36:53
问题 I have a std::vector<int> with contiguous shuffled values from 0 to N and want to swap, as efficiently as possible, each value with its position in the vector. Example: v[6] = 3; becomes v[3] = 6; This is a simple problem, but I do not know how to handle it in order to make it trivial and, above all, very fast. Thank you very much for your suggestions. 回答1: Given N at compile time and given the array contains each index in [0,N) exactly once, it's relatively straight forward (as long as it

Embed content of a html file to another html page using the Ionic framework?

由 前提是你 提交于 2019-12-07 12:22:37
问题 I”m currently creating a website using the Ionic framework that has a sidebar on the left side. Users can click on an item to go to another page of the website. Now I have to copy the code of the sidebar to every page and that's useless and not the way to go. So my question is if it is possible to "embed" a html page in a specific section of another page. For example I could have my sidebar be "static" and load in a login.html file in a specific div. And having one html file with all the
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