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问题 I try to sort an array of double value using qsort, but it doesn't seems to work. Wonder what has gone wrong here?? #include <stdio.h> #include <stdlib.h> static double compare (const void * a, const void * b) { if (*(double*)a > *(double*)b) return 1; else if (*(double*)a < *(double*)b) return -1; else return 0; } int main() { int idx; double* sum_least_square_err; sum_least_square_err = (double*) malloc (2500*2500*sizeof(double)); sum_least_square_err[0] = 0.642; sum_least_square_err[1] = 0

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 9 years ago . Is there any event for pressing ?, such as keyPress(KeyEvent.VK_?) in Java? 回答1: From http://docs.oracle.com/javase/6/docs/api/java/awt/event/KeyEvent

问题 I am using AWS lambda functions for a few months now. so far I have cached the connection in the lambda function memory to reuse. After reading about AWS rds proxy recently, I am trying to utilize the connection pool for the lambda functions(Runtime python3.7). so to test the way rds proxy works with lambda functions, I created two functions with runtime node12 and python3.7, the behaviours was this. 1. node12 function => When I run this function, it pools two connection in the proxy and

问题 I have a PCL library I want to distribute as NuGet package. Screenshot of the PCL application library properties page: csproj file: <TargetFrameworkVersion>v4.5</TargetFrameworkVersion> <TargetFrameworkProfile>Profile111</TargetFrameworkProfile> <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids> Steps to reproduce my problem: Clone both repos from: NuGet package Console application + PCL library Build the NugetPackage project +

问题 The following Powershell script runs a Google search of an image stored within my hard drive. How can I get the link which is followed to get to the results page? Is it possible to navigate to the different webpages displayed on it? I've tried $request.Links | Select href to try and get a list of the links, but it didn't work. I've also tried to add Write-Output $respStream to the code, but then it doesn't run. Set-ExecutionPolicy Bypass -scope Process -Force function Get-GoogleImageSearchUrl

问题 I'm writing a little mouselogger in basic C for linux. I search mouse event in linux/input.h, but I have not found anything about this. struct input_event { struct timeval time; __u16 type; __u16 code; __s32 value; } With the struct input_event , I can capturing which button was pressed on mouse and when she move, but not his position. ( I separate the field value in two __s16 variable, but is not a position). If anyone know a structure where I can access this, or a specific file to listen

问题 I'm creating a program that reads in input from a midi controller using libusb. How do I properly call libusb_bulk_transfer? Currently I'm receiving the error "LIBUSB_ERROR_NOT_FOUND" every time, and the data that I receive is "P". I've swapped out the function 'libusb_bulk_transfer' with 'libusb_interrupt_transfer' but I still receive the same error: LIBUSB_ERROR_NOT_FOUND Below are the libraries that I currently have included #include <stdlib.h> #include <stdio.h> #include <libusb-1.0

问题 I want make Media Player with C#&VS2019 Windows Version 10 SQLite Version 3 Build Environment 32bit I make Library Project and Console Project(Test) But I got this runtime error. Error System.Data.SQLite.SQLiteException 'SQL logic error near "'2021-10-30'": syntax error' DirectoryFileManager using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; using System.Data.SQLite; namespace Eagle_Lib { public class

问题 Why am I seeing different result on GPU compare to sequential CPU? import numpy from numba import cuda from functools import reduce A = (numpy.arange(100, dtype=numpy.float64)) + 1 cuda.reduce(lambda a, b: a + b * 20)(A) # result 12952749821.0 reduce(lambda a, b: a + b * 20, A) # result 100981.0 import numba numba.__version__ # '0.34.0+5.g1762237' Similar behavior happens when using Java Stream API to parallelize reduction on CPU: int n = 10; float inputArray[] = new float[n]; ArrayList<Float

问题 I have an express API running and when I make a request I get this message. Error: Access to XMLHttpRequest at 'http://localhost:9000/api/courses' from origin 'http://localhost:4222' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. I am using cors in my API here is my code: import * as express from 'express'; import {Application} from "express"; import {getAllCourses, getCourseById} from "./get-courses.route"; import {searchLessons