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Database development mistakes made by application developers [closed]
...ng appropriate indices
This is a relatively easy one but still it happens all the time. Foreign keys should have indexes on them. If you're using a field in a WHERE you should (probably) have an index on it. Such indexes should often cover multiple columns based on the queries you need to execut...
Sending emails with Javascript
...ta of your SMTP server, It's best to do it on the server side with Node or PHP, thanks equally
– jcarlosweb
Nov 26 '18 at 13:49
...
How do I prevent node.js from crashing? try-catch doesn't work
...
Other answers are really insane as you can read at Node's own documents at http://nodejs.org/docs/latest/api/process.html#process_event_uncaughtexception
If someone is using other stated answers read Node Docs:
Note that uncaughtException i...
How can I default a parameter to Guid.Empty in C#?
...id() instead
public void Problem(Guid optional = new Guid())
{
// when called without parameters this will be true
var guidIsEmpty = optional == Guid.Empty;
}
You can also use default(Guid)
default(Guid) also will work exactly as new Guid().
Because Guid is a value type not reference type, ...
How do I protect Python code? [closed]
...ecutable is well-known, and the Python byte-codes are well understood.
Usually in cases like this, you have to make a tradeoff. How important is it really to protect the code? Are there real secrets in there (such as a key for symmetric encryption of bank transfers), or are you just being paranoi...
App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...tor 2 中文网VIP会员免费享有基础版技术支持服务，有任何问题都可以在线及时得到解决，是创客学习App Inventor 2 必备之利器，欢迎体验！
来自中文网文档：https://www.fun123.cn/reference/iot/ble.html
可以获得到广播数据吗?可以获...
比尔盖茨“未来生活预言”的科技豪宅（图） - 资讯 - 清泛网 - 专注C/C++及内核技术
...、中东石油大王，俄罗斯能源寡头……只要是钱能解决的问题，以上这些人都能解决。但世界上总也一些事是无法用钱来解决的，比如说知识，比如说艺术。
比尔·盖茨最自豪的还是他的私人图书馆，这是一座圆顶建筑，...
How to disable manual input for JQuery UI Datepicker field? [duplicate]
...cking dates. Below is part of my code, and the way I integrated it into my PHP page:
2 Answers
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菜单的背景颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...运行效果如下图：
（PS：不知道大家有没有碰到过这个问题,MENUINFO结构未定义，解决的方法是进入文件选项卡（FileView),在Source File文件下的StdAfx.cpp文件里的最前面部分添加这个语句：#define WINVER 0x0501）
设计弹出式菜单
CMen...
How to force Chrome browser to reload .css file while debugging in Visual Studio?
...
Such as src="/css/styles.css?v={random number/string}"
If you're using php or another server-side language, you can do this automatically with time(). So it would be styles.css?v=<?=time();?>
This way, the query string will be new every single time. Like I said, there are much more compli...