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What is the email subject length limit?

How many characters are allowed to be in the subject line of Internet email? I had a scan of The RFC for email but could not see specifically how long it was allowed to be. I have a colleague that wants to programmatically validate for it. ...
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1030 Got error 28 from storage engine

I am working on a project where i need to create a database with 300 tables for each user who wants to see the demo application. it was working fine but today when i was testing with a new user to see a demo it showed me this error message ...
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Rotating a point about another point (2D)

I'm trying to make a card game where the cards fan out. Right now to display it Im using the Allegro API which has a function: ...
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What does FrameLayout do?

I'm new to programming. I was using Graphical Layout then when I was reading xml file, I saw FrameLayout. Then I searched, but I couldn't find something useful. What is FrameLayout and what does it do? ...
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How do I find numeric columns in Pandas?

Let's say df is a pandas DataFrame. I would like to find all columns of numeric type. Something like: 11 Answers ...
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Can I define a class name on paragraph using Markdown?

Can I define a class name on paragraph using Markdown? If so, how? 10 Answers 10 ...
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How to URL encode a string in Ruby

How do I URI::encode a string like: 8 Answers 8 ...
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How to center a button within a div?

I have a div that's width is 100%. 14 Answers 14 ...
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Programmatically saving image to Django ImageField

Ok, I've tried about near everything and I cannot get this to work. 17 Answers 17 ...
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Make a DIV fill an entire table cell

I've seen this question and googled a bit , but nothing so far has worked. I figure it's 2010 now (those questions/answers are old and, well, unanswered) and we have CSS3! Is there any way to get a div to fill an entire table cell's width and height using CSS? ...