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Linux 生产环境定位C++内存异常问题的思路 - 调试技术 - 清泛IT社区，为创新赋能！
1、首先，调查内存相关问题 asan 肯定是首选，不光是内存泄漏，内存越界、内存非法访问等内存异常问题。
2、开发环境可以直接套上 asan，编译时加上 -fsanitize=address，链接时加上 -lasan ，程序优雅退出即可。
3、生产环境一般...
App Inventor 2 代码调试方式：App调试、问题排查方法 · App Inventor 2 中文网
... App Inventor 2 代码调试方式：App调试、问题排查方法
App Inventor 2 调试方式
“标签”调试法
”预览代码块“调试功能
adb 调试：万能利器，调试拓展、查App崩溃
...
问题分析记录：Attempt to get item number 7 of a list of length 6 - App...
根据报错，很明显就是列表访问越界了，加一个保护就可以了，伪代码参考如下：
另外，用户遇到了其他问题，比如ClientSocketAI2Ext拓展发送数据截断问题等等，只要细心去排除，逐步定位问题点，都是能够解决的：
App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
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HC05 简单介绍
基本接入代码参考
常见问题解决
Error 515: Not connected to a Bluetooth device.
Error 507: unable to connect. is the device turned on?
乱码问题排查思路
参与讨论
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经典蓝...
MySQL vs MongoDB 1000 reads
...
man,,, the answer is that you're basically testing PHP and not a database.
don't bother iterating the results, whether commenting out the print or not. there's a chunk of time.
foreach ($cursor as $obj)
{
//echo $obj["thread_title"] . "<br><Br>";
...
企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...位读者在评论中提出了如果整个过程速度比较慢登陆会有问题这样一条评论...在之前的一篇文章《放好你的密码 - 从芝麻金融被攻破说起》中，一位读者在评论中提出了“如果整个过程速度比较慢登陆会有问题”这样一条评论。...
How can I sanitize user input with PHP?
...
It's a common misconception that user input can be filtered. PHP even has a (now deprecated) "feature", called magic-quotes, that builds on this idea. It's nonsense. Forget about filtering (or cleaning, or whatever people call it).
What you should do, to avoid problems, is quite simpl...
Detect when browser receives file download
...expireCookie( "downloadToken" );
attempts = 30;
}
Example server code (PHP):
$TOKEN = "downloadToken";
// Sets a cookie so that when the download begins the browser can
// unblock the submit button (thus helping to prevent multiple clicks).
// The false parameter allows the cookie to be expose...
CDN（内容分发网络）技术原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...务提供商这一角色。但是，IDC并不能解决内容的有效发布问题。内容位于网络的中心并不能解决骨干带宽的占用和建立IP网络上的流量秩序。因此将内容推到网络的边缘，为用户提供就近性的边缘服务，从而保证服务的质量和整...
Multiple inputs with same name through POST in php
... to get multiple inputs of the same name to post and then access them from PHP? The idea is this: I have a form that allows the entry of an indefinite number of physical addresses along with other information. If I simply gave each of those fields the same name across several entries and submitted...