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How do you determine what technology a website is built on? [closed]

Quite often I come across a nice looking or functional website, and wonder what technology was used to create it. What techniques are available to figure out what a particular website was built with? ...
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Javascript/jQuery: Set Values (Selection) in a multiple Select

I have a multiple select: 8 Answers 8 ...
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Does “git fetch --tags” include “git fetch”?

A nice and simple question - is the function of "git fetch" a strict sub-set of git fetch --tags ? 6 Answers ...
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Hidden features of Eclipse [closed]

Alright it can be a lame question, but everybody uses these things differently. What's some of the best time savers out there for this IDE. Tom ...
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Make .git directory web inaccessible

I have a website that I use github (closed source) to track changes and update site. The only problem is, it appears the .git directory is accessible via the web. How can I stop this and still be able to use git? ...
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How can I check if a program exists from a Bash script?

How would I validate that a program exists, in a way that will either return an error and exit, or continue with the script? ...
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How does an underscore in front of a variable in a cocoa objective-c class work?

I've seen in a few iPhone examples that attributes have used an underscore _ in front of the variable. Does anyone know what this means? Or how it works? ...
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Simple state machine example in C#?

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Indent multiple lines quickly in vi

It should be trivial, and it might even be in the help, but I can't figure out how to navigate it. How do I indent multiple lines quickly in vi? ...
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Is Big O(logn) log base e?

For binary search tree type of data structures, I see the Big O notation is typically noted as O(logn). With a lowercase 'l' in log, does this imply log base e (n) as described by the natural logarithm? Sorry for the simple question but I've always had trouble distinguishing between the different...