大约有 14,000 项符合查询结果(耗时:0.0258秒) [XML]

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怎么解决MQTT连接掉线,自动连接问题,同时解决,反复断开连接,断开连接问...

...接,还有切换页面的时候返回也是同样的问题,还有连接一个服务器,需要每个页面单独设置MQTT连接吗,是不是可以统一设置一个?https://www.fun123.cn/reference/iot/MQTT.html 文档正在翻译进度过半。 试了,切走页面,又切回...
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输入-选项索引值-查看下拉框的选项内容 - App Inventor 2 文网 - ...

...加了1个下拉框,并用字符串输入了20个选择项(数字),一个按纽健,一个文本输入框(用于输入选择项的索引值),一个标签(用于显示输入的索引值对应的选择项内容,网上查看了下编码过程,但文字叙述还是一头雾水没理...
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Ruby on Rails Server options [closed]

...he hybrid I/O model in Phusion Passenger Enterprise 4 or later makes it an excellent choice for these kinds of workloads. Other app servers require the user to run at least one instance per application. By contrast, Phusion Passenger supports multiple applications in a single instance. This greatl...
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What modern C++ libraries should be in my toolbox? [closed]

... @OliverStutz I've added some XML libraries. Credit goes to this excellent answer which contains an analysis of which one to use. – JBentley Dec 1 '13 at 20:32 ...
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Fluent Validation vs. Data Annotations [closed]

...view models Unit testing is far easier compared to Data Annotations It has excellent client side validation support for most standard validation rules share | improve this answer | ...
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How do I specify a pointer to an overloaded function?

... Hurray for lambdas! Indeed, an excellent solution to the overload resolution problem. (I thought of this also, but decided to leave it out of my answer so as not to muddy the waters.) – aldo Feb 17 '14 at 21:20 ...
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boost自定义composite_key_compare比较函数 - C/C++ - 清泛网 - 专注C/C++及内核技术

...,当然我们也可以自定义比较函数。另外,如果调试过程遇到很奇怪的问题,可以在自定义比较函数下断点进行调试。 // boost_demo.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include "boost/shared_ptr.hpp" #include "...
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CListCtrl指定行并发送LVN_ITEMCHANGED消息 - C/C++ - 清泛网 - 专注C/C++及内核技术

CListCtrl指定行并发送LVN_ITEMCHANGED消息在使用CListCtrl列表控件的程序,当我们修改了CListCtrl后需要要定位到已修改的行,可以使用下面的函数实现: 定位并使指定行选m_list...在使用CListCtrl列表控件的程序,当我们修改...
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MFC 修改对话框图标 - C/C++ - 清泛网 - 专注C/C++及内核技术

MFC 修改对话框图标在对应对话框的初始化函数OnInitDialog(),添加以下代码:HICON m_hIcon;m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 主框架的...在对应对话框的初始化函数OnInitDialog(),添加以下代码: HICON m_hIcon; m_hIcon = AfxGetApp()->...
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截图软件截图区域以外背景变灰的实现--AlphaBlend - C/C++ - 清泛网 - 专注...

...图软件截图区域以外背景变灰的实现--AlphaBlendOnPaint()方法: ------------画黑色背景---------------- COLORREF bgColor =...OnPaint()方法: // ------------画黑色背景---------------- COLORREF bgColor = RGB(0, 0, 0); char alpha = (255 * ...