No one in particular questions

No one in particular answers

• Determine points within a given radius algorithm
• Estimating the square root
• How to connect a button to a method on Mac OS X
• OpenGL ES For Iphone
• Xcode change global variable for each target
• Random crash on iPhone OpenGL app when navigating
• Getting an object from an NSSet
• Self-Learning XCode/Objective-C: 'static' doesn't seem to mean what I *think* it means