It never occured to me to use it for indexOf, but if it works, that's nice. I usually use a bitwise OR as a faster alternative to Math.floor:
1.324324|0 // 1
Well, it's not exactly floor, as it will just cut of everything after the dot, but if you're only dealing with positive number it does the job and has the nice side effect of converting non-numbers into 0:
I remember once when I was at Disney's Animal Kingdom and I got to dance with some of the cast members! It was so much fun! After the show my dad and I got frozen lemonade and some ice cream. It makes me feel better remembering the good things about my dad... maybe I will return to Orlando.