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SQL keys, MUL vs PRI vs UNI
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For Mul, this was also helpful documentation to me - http://grokbase.com/t/mysql/mysql/9987k2ew41/key-field-mul-newbie-question
"MUL means that the key allows multiple rows to have the same value.
That is, it's not a UNIque key."
For example, let's say you have two models, Po...
What is the maximum length of a Push Notification alert text?
...inary interface, maximum payload size is 2KB (2048 bytes).
When using the HTTP/2 provider API, maximum payload size is 4KB (4096 bytes).
For Voice over Internet Protocol (VoIP) notifications, the maximum size is 5KB (5120 bytes)
OLD ANSWER:
According to the apple doc the payload for iOS 8 is 2 kil...
Quick and easy file dialog in Python?
...For example search for "activetcl pricing" will lead you to this web page: https://reviews.financesonline.com/p/activetcl/)
So tkinter library will cost money for any application wanting to embedd python.
I by myself managed to find pythonnet library:
Overview here: http://pythonnet.github.io/
S...
How to overlay one div over another div
...div id="navi">a</div>
<div id="infoi">
<img src="https://appharbor.com/assets/images/stackoverflow-logo.png" height="20" width="32" />b
</div>
</div>
I would suggest learning about position: relative and child elements with position: absolute.
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Can I use if (pointer) instead of if (pointer != NULL)?
Is it safe to check a pointer to not being NULL by writing simply if(pointer) or do I have to use if(pointer != NULL) ?
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Show control hierarchy in the WinForms designer
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How do browser cookie domains work?
...suffix domains. I've written an article explaining the current situation - http://bayou.io/draft/cookie.domain.html
To summarize, rules to follow regarding cookie domain:
The origin domain of a cookie is the domain of the originating request.
If the origin domain is an IP, the cookie's domain att...
When is TCP option SO_LINGER (0) required?
...uld be a connection pool, as seen in every heavy-duty TCP API, for example HTTP 1.1.
– Marquis of Lorne
Aug 24 '14 at 10:12
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Do I need to explicitly call the base virtual destructor?
When overriding a class in C++ (with a virtual destructor) I am implementing the destructor again as virtual on the inheriting class, but do I need to call the base destructor?
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I want to delete all bin and obj folders to force all projects to rebuild everything
I work with multiple projects, and I want to recursively delete all folders with the name 'bin' or 'obj' that way I am sure that all projects will rebuild everything (sometimes it's the only way to force Visual Studio to forget all about previous builds).
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