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al_m473 says

what is going on when you see something like this coded?

prototype.js?20090805060458

why are the numbers added to the end of the item? and what effect do they have?

Al

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jremick Staff says

It’s probably for file versioning for stuff like CDN ’s. That’s what I do for my WP blog’s JS files.

In this case it looks like they just added the exact time at the end.

2009 (yr) – 08 (mo) – 05 (day) – 06 (hr) – 04 (min) – 58 (sec)

The reason you do this with CDN ’s is because, like Amazon’s CloudFront, the requested file isn’t updated if the file’s name doesn’t change. Instead of changing the actual file name, you can add a version at the end. Then the new file is requested and cached.

Hope that helps. ;-)

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Ivor Reviewer says

Damn! What a good explanation! I didn’t knew that. Thank al_m473 for bringing this up!

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CreativeMilk says

I have learned something new today ;)

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