handler | 易学教程

knockout.js - modify DOM in current item in list (expand list item subsection) using templates

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问题 In this example I want to use knockout.js to allow the "Expand" link to be clicked and have its text changed to "Collapse". I also want to set the make the jobDetails section visible. This is a very general question of how to get knockout.js to specifically modify the DOM of the "current" item in a list using a click handler. <script type="text/html" id="job-template"> <div class="jobContainer"> <label data-bind="text: JobTitle"></label> <label data-bind="text: CompanyName"></label> <div

Swift 2 to Swift 3: Cannot convert value of type '(Data?, NSError?) -> Void' to to expected argument type 'GTMSessionFetcherCompletionHandler?'

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问题 I just updated a working Swift 2 to Swift 3 program, and I am getting the error, Cannot convert value of type '(Data?, NSError?) -> Void' to expected argument type 'GTMSessionFetcherCompletionHandler?' Here are the relevant details (I hope): let fetcher = GTMSessionFetcher(urlString:url) fetcher.authorizer = parentController.service.authorizer fetcher.beginFetch(completionHandler: handleDownload(studentNum)) ^^^^ causing the error The function for the completionHandler: func handleDownload(_

Perl - How to use a process Handle created in a Module in another Perl Script

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问题 Ultimately, what I want to do is to start a process in a module and parse the output in real time in another script. What I want to do : Open a process Handler (IPC) Use this attribute outside of the Module How I'm trying to do it and fail : Open the process handler Save the handler in a module's attribute Use the attribute outside the module. Code example : #module.pm $self->{PROCESS_HANDLER}; sub doSomething{ ... open( $self->{PROCESS_HANDLER}, "run a .jar 2>&1 |" ); ... } #perlScript.pl my

handler.removecallbacks not working

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问题 public class MainActivity extends AppCompatActivity { int total = 0,k=0,j=0,i; public EditText editText; private int mInterval = 1000; Handler mHandler = new Handler(); String formula_value,url_value; TextView textView,textView1; ArrayList<Integer> list; JSONArray m_jArry,m_jArry1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar

springmvc register过程

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 首先在AbstractHandlerMethodMapping中，在afterPropertiesSet这个钩子函数中，先初始化handlerMethods。在detectHandlerMethods中，获取如下map // key值为method value为 RequestMappingInfo 这个类标明了该方法的条件包括url以及http方法等等信息 Map<Method, T> methods = MethodIntrospector.selectMethods(userType, (MethodIntrospector.MetadataLookup<T>) method -> { try { return getMappingForMethod(method, userType); } catch (Throwable ex) { throw new IllegalStateException("Invalid mapping on handler class [" + userType.getName() + "]: " + method, ex); } }); 注册的过程在方法中进行 // mapping 的信息 handler为该方法的bean的name method为方法 public

面试过程中，你知道这些小知识，将事半功倍

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在平时我们面试的过程总总会遇到一些面试官问一些平时我们不怎么注意的问题，当问出来的时候，面试者通常都是一脸懵逼，这和我想象中的不一样阿，怎么不按照套路出牌，当然一些小知识更能体现出你的细心和好学，以下分析20个面试中的小知识，共勉~.· 整理的这份PDF有从基础到进阶。含有BATJ.字节跳动面试专题，算法专题，高端技术专题，混合开发专题，java面试专题，Android,Java小知识，到性能优化.线程.View.OpenCV.NDK等应有尽有。还有辅之相关的视频+学习笔记 (更多完整项目下载。未完待续。源码。图文知识后续上传github。) 可以点击关于我联系我获取完整PDF和面试准备路线 ( VX：mm14525201314 ) Android 面试帮助篇 1 、要做一个尽可能流畅的 ListView ，你平时在工作中如何进行优化的？ ①Item 布局，层级越少越好，使用 hierarchyview 工具查看优化。 ②复用 convertView ③使用 ViewHolder ④item 中有图片时，异步加载 ⑤快速滑动时，不加载图片 ⑥item 中有图片时，应对图片进行适当压缩 ⑦实现数据的分页加载 2 、对于 Android的安全问题 ①错误导出组件 ② 参数校验不严 ③WebView 引入各种安全问题,webview 中的 js 注入 ④不混淆、不防二次打包

Call asynctask in handler

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问题 I am trying to call AsyncTask inside handler every 1 second but I keep getting RuntimeException.Anybody knows how this could be fixed? Below is my code: package com.example.whatsapp; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.ActionBar; import android.support.v4.app.Fragment; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.view.LayoutInflater; import android.view.Menu; import

How do I “create”/“assign” a logging handler for Google Cloud Pubsub?

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问题 Development from the previous thread found that the assumptions when asking the question were off-topic (subprocess was actually not causing the problems), so I'm making a more focused post. My error message: No handlers could be found for logger "google.cloud.pubsub_v1.subscriber._protocol.streaming_pull_manager" My intent: Pass on Google PubSub message attributes as Python variables for re-use in later code. My code: import time import logging from google.cloud import pubsub_v1 project_id =

Can't call handler in an AsyncTask?

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问题 I want to create a background thread (execute even if my activity dies) that update my data location et send it to my server with an http resquest. But it occurs an exception: 02-01 07:50:18.172: ERROR/Exception1(277): Can't create handler inside thread that has not called Looper.prepare() My code: public class Messagerie extends Activity { private LocationManager locationManager; private String locationProvider = LocationManager.NETWORK_PROVIDER; public void onCreate(Bundle

Android - how to run a task via “handler” periodically within a service-intent (worker-thread)

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问题 My question is Android related: How do I run a task every 20 seconds within an intentservice ? Problem is, I have to init some classes which will be used in the Handler "run" process. It works one time - but then the service stops & the application crashes when the handler-loop starts again after 20 seconds (probably because of the classes that got eliminated when the service stopped?). So maybe the solution is to get the service to stay running as long as the Handler runs or to throw away