callback

AsyncThreads---异步多线程

由 自闭症网瘾萝莉.ら 提交于 2020-01-02 05:08:13
1.概念： 同步方法 调用在程序继续执行之前需要等待同步方法执行完毕返回结果 异步方法 则在被调用之后立即返回以便程序在被调用方法完成其任务的同时执行其它操作。 同步: 比如有三个程序要执行，必须第一个程序被触发，执行结束了吗，才轮到其他程序执行。 异步：所有程序的执行不需要同步，可以多个触发，互相独立的执行相应的指令。 2.代码示例： 2.1 同步方法----winform 本质上时基于 事件，委托的 btnSync 这个按钮可以理解为一个事件，订阅了btnSync_Click方法 1 /// <summary> 2 /// 同步方法 3 /// </summary> 4 /// <param name="sender"></param> 5 /// <param name="e"></param> 6 private void btnSync_Click(object sender, EventArgs e) 7 { 8 //Thread 9 Console.WriteLine($"****************btnSync_Click Start {Thread.CurrentThread.ManagedThreadId}***************"); 10 //总共5件事，做完一件再做下一件 11 for (int i = 0; i < 5; i++) 12 {

WCF Callback: Is it interoperable with Java?

由 夙愿已清 提交于 2020-01-02 04:57:05
问题 Currently I implement all my webservices in the "normal" fashion... that is, I create a WSDL file in Eclipse and then use WSCF.blue (A visual studio extension) to auto-generate the necessary code and it is reply/request. However I was hoping to use callbacks instead, so I can have my services become "push" services. Before I jump into reworking my application, I was wondering about its interoperability. If I use callbacks (WCF), can my Java client still use this? Oh, and I guess I should

TPL How to Perform a 'Call-Back'

由 巧了我就是萌 提交于 2020-01-02 04:40:31
问题 I have a small application that needs to test SQL connection strings for a number of connections (each done one-at-a-time). To do this I set the ConnectionTimeout = 5 temporarily to avoid a long wait if the connection is not valid and ConnectionTimeout = 0 (wait forever), say. To avoid the UI hanging whilst we attempt to Open() a bad connection (even with ConnectionTimeout = 5 the wait for the SqlException can be up to twenty seconds), I want to run the test on a separate thread using Task

jquery Full Calendar: callback 'after' the calendar has loaded completely

由 杀马特。学长 韩版系。学妹 提交于 2020-01-02 01:30:32
问题 Is there a callback in Adam Shaw's jquery full calendar which is called after the calendar has rendered completely?? I want to call the clientEvents function in that call back to get all the events on the client side. I tried doing this in viewDisplay, but it is called before the events are rendered and the clientEvents returns 0 events. 回答1: Actually you can add it by yourself. Update the function render in the fullcalendar.js like this function render(inc) { if (!content) { initialRender();

jquery Full Calendar: callback 'after' the calendar has loaded completely

由 痞子三分冷 提交于 2020-01-02 01:30:07
问题 Is there a callback in Adam Shaw's jquery full calendar which is called after the calendar has rendered completely?? I want to call the clientEvents function in that call back to get all the events on the client side. I tried doing this in viewDisplay, but it is called before the events are rendered and the clientEvents returns 0 events. 回答1: Actually you can add it by yourself. Update the function render in the fullcalendar.js like this function render(inc) { if (!content) { initialRender();

how to execute an action if the before_action returns false

由 痴心易碎 提交于 2020-01-02 00:55:08
问题 I know that with the following code: before_action :signed_in?, only: [:new] the action new will be executed if the signed_in? returns true, but instead if I want the new action to be executed when signed_in? returns false what do I have to do? Do I have to create a new method called, for instance, not_signed_in? ? Here it is my signed_in? method def signed_in? !@current_user.nil? end 回答1: before_action doesn't work as you think - it doesn't prevent action to be executed if callback returns

How to make a dynamic body static in Cocos2d v3.0 with Chipmunk

由 左心房为你撑大大i 提交于 2020-01-02 00:18:13
问题 I’m using Cocos2d v3 and want to change a body from dynamic to static after colliding with another body. At the moment I’ve got: -(void)ccPhysicsCollisionPostSolve:(CCPhysicsCollisionPair *)pair static:(CCNode *)nodeA wildcard:(CCNode *)nodeB { _player.physicsBody.type = CCPhysicsBodyTypeStatic; } or -(BOOL)ccPhysicsCollisionPreSolve:(CCPhysicsCollisionPair *)pair static:(CCNode *)nodeA wildcard:(CCNode *)nodeB { _player.physicsBody.type = CCPhysicsBodyTypeStatic; return YES; } but neither

How to wrap C library callbacks in C++/CLI

由 ぐ巨炮叔叔 提交于 2020-01-01 17:13:50
问题 Given the following C library with a callback event that ask to set a buffer, how to write a proper C++/CLI wrapper in a type safe manner? // The callback signature typedef void (__cdecl *BUFFERALLOCATOR)(void *opaque, void **buffer); // A struct that contains the context of the library struct lib_context_base_s { // The stored callback function pointer BUFFERALLOCATOR buffer_allocator; // Opaque pointer that contain the local context. Needed in C because // C doesn't have closures (functions

Pass Data between two view controllers using 'Delegation' : Objective-C

由 妖精的绣舞 提交于 2020-01-01 17:09:37
问题 I am implementing an library(.a), and I want to send notification count from library to app so they can show in their UI, notification count. I want them to implement the only method like, -(void)updateCount:(int)count{ NSLog(@"count *d", count); } How can I send the count from my library continuously so they can use it in updateCount method to show. I searched and come to know about call back functions. I have no idea how to implement them. Is there any other way to do this. 回答1: You have 3

Arguments to callback function in mongoose, express and node.js

由 有些话、适合烂在心里 提交于 2020-01-01 16:24:08
问题 I follow a MCV approach to develop my application. I encounter a problem that I dont know how the arguments are passed to the callback function. animal.js (model) var mongoose = require('mongoose') , Schema = mongoose.Schema var animalSchema = new Schema({ name: String, type: String }); animalSchema.statics = { list: function(cb) { this.find().exec(cb) } } mongoose.model('Animal', animalSchema) animals.js (controller) var mongoose = require('mongoose') , Animal = mongoose.model('Animal')
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