I tried looking for the ternary operator in the NSExpression documentation, but I couldn't find anything. I ended up finding an obscure reference in a 3rd party website to a TERNARY function, so I tried it out and sure enough, it worked.
Had I not found this reference and tried the function myself, I would have believed that NSExpression simply doesn't support this function.
To prevent something like that from happening again in the future with a different function, is there any way to find out the exhaustive list of functions / operators / syntax that NSExpression (and NSPredicate) supports so that I can learn about its full functionality?