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Empty set literal?

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Installing Apple's Network Link Conditioner Tool

I have installed xcode 4.3.1 on my machine running Lion. 6 Answers 6 ...
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How to draw a custom UIView that is just a circle - iPhone app

How would I go about drawing a custom UIView that is literally just a ball (a 2D circle)? Would I just override the drawRect method? And can someone show me the code for drawing a blue circle? ...
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How can I handle R CMD check “no visible binding for global variable” notes when my ggplot2 syntax i

EDIT: Hadley Wickham points out that I misspoke. R CMD check is throwing NOTES, not Warnings. I'm terribly sorry for the confusion. It was my oversight. ...
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Scroll to bottom of div?

I am creating a chat using Ajax requests and I'm trying to get messages div to scroll to the bottom without much luck. 28 A...
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nginx error “conflicting server name” ignored [closed]

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ffmpeg - Converting MOV files to MP4 [closed]

I have just installed ffmpeg and I am trying to encode all my uploaded videos to .mp4 file. Most of the users currently upload .mov and I want to convert every video to .mp4. ...
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What is Model in ModelAndView from Spring MVC?

Having this basic function 7 Answers 7 ...
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Should I use past or present tense in git commit messages? [closed]

I read once that git commit messages should be in the imperative present tense, e.g. "Add tests for x". I always find myself using the past tense, e.g. "Added tests for x" though, which feels a lot more natural to me. ...
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Test a weekly cron job [closed]

I have a #!/bin/bash file in cron.week directory. 11 Answers 11 ...