Set Default XCode

Context:
XCode 4.3
XCode 4.5

Problem:
I want to keep XCode 4.3 and default to XCode 4.5.  I want to switch between the two.

Solution:
At command line,

xcode-select --print-path to show the current path
sudo xcode-select -switch /Applications/XCode4.5/Xcode.app