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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...泄露告警或控制石油管道阀门的命令，就必须要在网络有问题的情况下也要能确保发送成功。
myriota这家提供物联网数据LEO卫星传输服务的公司，流量报价是1M字节的数据500美元/月。因此，每次传输节省几个字节也能省不少...
Biggest advantage to using ASP.Net MVC vs web forms
... there is an abundance of information with regards to questions, problems, etc. Offers more third-party control - need to consider your existing toolkits.
ASP.NET MVC:
Separation of concerns (SoC)
• From a technical standpoint, the organization of code within MVC is very clean, organized an...
How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
...3. So my production code looks like:
$i=11263;
while($i>08448){
...etc...
You can look up the blocks of Unicode by type here:
http://unicode-table.com/en/
If you know you're translating Arabic or Telegu or whatever, you can just replace those codes, not all 65,000.
You could apply this s...
How do I check if a directory exists? “is_dir”, “file_exists” or both?
...ent, but it's not a dir
//do something with file - delete, rename, etc.
unlink('file'); //for example
mkdir('file', NEEDED_ACCESS_LEVEL);
}
} else { //no file exists with this name
mkdir('file', NEEDED_ACCESS_LEVEL);
}
...
nginx - nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
...Thanks for digging into this and providing an explanation to why deleting /etc/nginx/sites-available/default helps with the above error.
– Oliver
Mar 18 '13 at 11:31
1
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Gradients in Internet Explorer 9
...he gradient, or make it more sophisticated (radial gradients, transparency etc.) but this is great for those simple (vertical) linear gradients.
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What are the best PHP input sanitizing functions?
...will be used in the header (like the From: name and email address, subect, etc)
$input = preg_replace('/\s+/', ' ', $input);
If you don't do this it's just a matter of time before the spam bots find your form and abuse it, I've learned the hard way.
...
What is a postback?
...age will be manipulated by the user (a button clicked or dropdown changed, etc), and this control will initiate a postback. The state of this control, plus all other controls on the page,(known as the View State) is Posted Back to the web server.
What happens?
Most commonly the postback causes the...
Is it a good practice to use an empty URL for a HTML form's action attribute? (action=“”)
...rted into the database
The user's identifying information (email, address, etc) has been compromised
References
Bypassing CSRF protections with ClickJacking and HTTP Parameter Pollution
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Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
...方库，或者你独立开发的，用于多个父项目的库。 现在问题来了：你想要把它们当做两个独立的项 有种情况我们经常会遇到：某个工作中的项目需要包含并使用另一个项目。 也许是第三方库，或者你独立开发的，用于多个父...