How to quickly fix (or avoid) the n-gons caused by boolean operation? I'm trying to model a pistol slide with grooves in it which is supposed to look like this:



What I did was creating an array of cubes and subtracting it from the slide with boolean modifier. This precedure ended up with multiple n-gons:



I thought those n-gons might cause some trouble later on, so I used the knife tool to manually cut all the faces into quads.



As there were only 7 grooves in the mesh, I didn't spend too much time doing this. But I wonder if there is a easier or better way to get the same result, in case the object is much more complex than the one I'm making.
Select the N-gons with Shift+G
CTRL+T
Alt+J


This is the fast and easy way. The minus is that it's not always all quads. And avoid Boolean if you can as corrections are required if you use it

OR, easier yet



Use CTRL+R once on the pointed edge and snap it to vertices before you OK it.

Btw. okaying answers gives you +2 reputation.