609Hide/Show Files in the Mac OSX GUI

Hiding files and folders from the Finder:
chflags hidden filename
And show them again:
chflags nohidden filename

590Adding an UIAlertView

Unlike other UIViews, UIAlertView does not need to be added to another view via addSubView. [myAlertView show] takes care of that. Trivial, maybe. But I wasn’t aware of it.

139QC Show/Hide Private Patches

Run from Terminal: defaults write -g QCShowPrivatePatches 1 defaults write -g QCShowPrivatePatches 0