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Resumable downloads when using PHP to send the file?

...tent. Then, if request with a Range: bytes=x-y header is received (with x and y being numbers) you parse the range the client is requesting, open the file as usual, seek x bytes ahead and send the next y - x bytes. Also set the response to HTTP/1.0 206 Partial Content. Without having tested anythi...
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difference between use and require

Can anyone explain the difference between use and require , both when used directly and as :use and :require in the ns macro? ...
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How to count number of files in each directory?

... Assuming you have GNU find, let it find the directories and let bash do the rest: find . -type d -print0 | while read -d '' -r dir; do files=("$dir"/*) printf "%5d files in directory %s\n" "${#files[@]}" "$dir" done ...
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Wildcards in a Windows hosts file

..., I can just add vhosts to Apache called site1.local , site2.local etc, and have them all resolve to localhost , while Apache serves a different site accordingly. ...
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Converting RGB to grayscale/intensity

... from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140. ...
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Invoking JavaScript code in an iframe from the parent page

Basically, I have an iframe embedded in a page and the iframe has some JavaScript routines I need to invoke from the parent page. ...
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How do you make an element “flash” in jQuery

I'm brand new to jQuery and have some experience using Prototype. In Prototype, there is a method to "flash" an element — ie. briefly highlight it in another color and have it fade back to normal so that the user's eye is drawn to it. Is there such a method in jQuery? I see fadeIn, fadeOut, and an...
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How can I make grep print the lines below and above each matching line? [duplicate]

I have to parse a very large file and I want to use the command grep (or any other tool). 3 Answers ...
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How to minify php page html output?

... CSS and Javascript Consider the following link to minify Javascript/CSS files: https://github.com/mrclay/minify HTML Tell Apache to deliver HTML with GZip - this generally reduces the response size by about 70%. (If you use Apach...
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Compare a string using sh shell

I am using SH shell and I am trying to compare a string with a variable's value but the if condition is always execute to true. Why? ...