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mqtt协议一般最大支持订阅几个主题？ - 创客硬件开发 - 清泛IT社区，为创新赋能！
主要取决于MQTT的服务器端，一般几十到几百。以下来自AI的回答。
这是一个非常好的问题，但它没有一个简单的固定数字作为答案。MQTT协议规范本身并没有硬性规定一个客户端可以订阅主题的最大数量。这个限制主要取决于...
【解决】ble蓝牙 RequestMTU 请求没有反应？设置没有生效？ - 创客硬件开发...
...ble4.2 及以上才支持MTU设置，否则设置无效。
（可以问 AI 确定硬件的BLE版本）[/hide]
List Git aliases
...to yield lines starting with alias in case some configurations somehow contains keyword alias: git config --list | grep -E '^alias'
– MasterMind
Feb 2 '18 at 10:19
add a comme...
REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...可以不安装或在安装完 pdksh 以后再安装。
将pdksh 程序包下载到本地。 Pdksh安装包需要在网上下载光盘里没有
# rpm -ivh pdksh-5.2.14-37.el5_8.1.x86_64.rpm
注意：如果提示该程序包与 ksh冲突，如果已经安装 ksh，建议使用命令 rpm -e ksh...
AppInventor2中的二进制数据以什么样的形式传递？字节列表、字节数组是什么...
...p; public void PublishByteArray(String Topic, Object ByteArray, boolean RetainFlag, int QoS) {
final String funcName = "PublishByteArray";
resetErrorInfo(funcName);
if (...
Get MIME type from filename extension
...emoved, so you should be extra cautious and add double checks and provide fail safe action for every step.
MimeMapping._mappingDictionary.AddMapping(string fileExtension, string mimeType)
share
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vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...
【二、Boost库的编译】
【Setp1 准备工作】：
（1）Boost 下载可以到官方网站下载：
http://www.boost.org/
（2）安装VS2008 IDE
【Setp2 编译Boost】
1.打开Visual Studio 2008 命令提示窗口
2.进入D:\05_Computer\04_3rdPatry\02Boost\boost_1_44_0\boost...
Is there a MySQL option/feature to track history of changes to records?
...in a MySQL database. So when a field has been changed, the old vs new is available and the date this took place. Is there a feature or common technique to do this?
...
Find a Git branch containing changes to a given file
I have 57 local branches. I know I made a change to a certain file in one of them, but I'm not sure which one. Is there some kind of command I can run to find which branches contain changes to a certain file?
...
Working with select using AngularJS's ng-options
...ect controls, and not just primitive types. For example:
app.controller('MainCtrl', function($scope) {
$scope.items = [
{ id: 1, name: 'foo' },
{ id: 2, name: 'bar' },
{ id: 3, name: 'blah' }
];
});
<div ng-controller="MainCtrl">
<select ng-model="selectedItem" ng...