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Comment by adriand | Hacker News Reader

I believe Xcode 4 does something similar to the heatmaps shown here, although it does everything vertically, in shades of gray. You can sort of see it in this screenshot - look in the left-hand margin of the code editing window. http://www.neowin.net/images/uploaded/xcode4.jpg

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I get a 403 forbidden (check your permissions maybe?)

outside referrers are blocked, copy and paste the url

When there is no redirect so you can click a link, and then just hit CR on the blocked page's URL.

Whoops! I just did a Google image search and found that image, it wasn't mine. I didn't realize it wouldn't link properly.

I tried to post a comment to this effect on stack exchange, but it wouldn't let me post images.

XCode does this in a single column using varying shades of grey:

   http://i.stack.imgur.com/frCcI.png

The grey rectangles may also be clicked on to fold text. On hover you see:

   http://i.stack.imgur.com/EzjXW.png

And after folding you see:

   http://i.stack.imgur.com/wsNRR.png

Xcode 3 does this as well.

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