cappuccino/cappuccino — comment on commit 1c2a304ee54054f8d53597043102737666b16eb1
File: AppKit/CPTableView.j line 686
By tolmasky:

I added the +'s during a fit of defensive programming. I still contend that this is the right way to go. It goes beyond just protecting against ===, It defends against all sorts of problems when sending non numbers down the line. As klaas mentioned, perhaps someday we will have a parser that automatically generates x = +x whenever x has a Number parameter type, but until then I think its the right thing to do as it best approximates the user having done [object blah:Number(actualValue)];