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What's the meaning of exception code “EXC_I386_GPFLT”?

What's the meaning of exception code EXC_I386_GPFLT ? 12 Answers 12 ...
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Why do we check up to the square root of a prime number to determine if it is prime?

... If a number n is not a prime, it can be factored into two factors a and b: n = a * b Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the f...
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How can I use a carriage return in a HTML tooltip?

I'm currently adding verbose tooltips to our site, and I'd like (without having to resort to a whizz-bang jQuery plugin, I know there are many!) to use carriage returns to format the tooltip. ...
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Repeating characters in VIM insert mode

Is there a way of repeating a character while in Vim's insert mode? For example, say I would like to insert 80 dashes, in something like emacs I would type: ...
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Node.js app can't run on port 80 even though there's no other process blocking the port

I'm running an instance of Debian on Amazon EC2 with Node.js installed. If I run the code below: 9 Answers ...
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Bash script and /bin/bash^M: bad interpreter: No such file or directory [duplicate]

I'm learning through this tutorial to learn bash scripts to automate a few tasks for me. I'm connecting to a server using putty. ...
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How can I print literal curly-brace characters in python string and also use .format on it?

...double the {{ and }}: >>> x = " {{ Hello }} {0} " >>> print(x.format(42)) ' { Hello } 42 ' Here's the relevant part of the Python documentation for format string syntax: Format strings contain “replacement fields” surrounded by curly braces {}. Anything that is not conta...
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Centering a view in its superview using Visual Format Language

I just started learning AutoLayout for iOS and had a look at Visual Format Language. 14 Answers ...
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How to render a DateTime object in a Twig template

One of my fields in one of my entities is a "datetime" variable. 9 Answers 9 ...
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MySQL combine two columns into one column

I'm trying to find a way to combine two columns into one, but keep getting the value '0' in the column instead to the combination of the words. ...