runtime

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 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 I am writing MATLAB scripts since some time and, still, I do not understand how it works "under the hood". Consider the following script, that do some computation using (big) vectors in three different ways: MATLAB vector operations; Simple for cycle that do the same computation component-wise; An optimized cycle that is supposed to be faster than 2. since avoid some allocation and some assignment. Here is the code: N = 10000000; A = linspace(0,100,N); B = linspace(-100,100,N); C = linspace(0

问题 I am writing MATLAB scripts since some time and, still, I do not understand how it works "under the hood". Consider the following script, that do some computation using (big) vectors in three different ways: MATLAB vector operations; Simple for cycle that do the same computation component-wise; An optimized cycle that is supposed to be faster than 2. since avoid some allocation and some assignment. Here is the code: N = 10000000; A = linspace(0,100,N); B = linspace(-100,100,N); C = linspace(0

问题 I am calling java.lang.Runtime.exec(...) in my Java program to run a command (some FFMPEG commands) simply passed to my function: private static void RunCommand(String command) throws InterruptedException { try { // Execute command Process proc = Runtime.getRuntime().exec(command); } } It runs OK for simple FFMPEG cases such as ffmpeg -i input.avi -c copy output.avi . But for one of the commands, apparently it doesn't run. When I copy/paste the exact String in command line, I am able to run

问题 I've been using python for a long time. python's system and subprocess methods can take shell=True attibute to spawn an intermediate process setting up env vars. before the command runs. I've be using Java back and forth and using Runtime.exec() to execute shell command. Runtime rt = Runtime.getRuntime(); Process process; String line; try { process = rt.exec(command); process.waitFor(); int exitStatus = process.exitValue(); } I find difficulty to run some commands in java with success like

问题 I know that each thread usually have one call stack, which is just a chunk of memory and controlled by using esp and ebp. 1, how are these call stacks created and who's responsible for doing this? My guess is the runtime, for example Swift runtime for iOS application. And is it the thread directly talks to its own call stack by esp and ebp or through runtime? 2, for each call stack, they have to work with the esp and ebb cpu registers, if I have a CPU with 2 cores 4 threads, then let's say it

问题 I know how to pass a regular comparison class or function to set::set<>. I am writing some test code and I want to emulate some C libraries using STL's std::set and I want to be able to pass a C callback to the comparison object so a different comparison takes place. I have the following theoretical code: struct MyClass { int a; }; typedef bool (*user_callback_t)(void *, void *); class MyComparison { private: user_callback_t cb = nullptr; public: MyComparison(user_callback_t cb): cb(cb) { }

问题 My app worked properly ! When run android The application is compiled without error, but returns the message when it's displayed. Unfortunately, application has stopped It happened when i install and link these two packages react-native-push-notification AND react-native-google-analytics-bridge { "rnpm": { "assets": [ "./assets/fonts/" ] }, "name": "Melkana", "version": "0.0.1", "private": true, "scripts": { "start": "node node_modules/react-native/local-cli/cli.js start", "test": "jest" },

问题 My app worked properly ! When run android The application is compiled without error, but returns the message when it's displayed. Unfortunately, application has stopped It happened when i install and link these two packages react-native-push-notification AND react-native-google-analytics-bridge { "rnpm": { "assets": [ "./assets/fonts/" ] }, "name": "Melkana", "version": "0.0.1", "private": true, "scripts": { "start": "node node_modules/react-native/local-cli/cli.js start", "test": "jest" },