What exactly is still up in the air, but perhaps something like a[5] == 5[a], More Magic, or 0x5f3759d5."
I get that "More Magic" is from this story (http://catb.org/esr/jargon/html/magic-story.html) and that "0x5f3759d5" is from Quake's Fast Inverse Square Root code (http://betterexplained.com/articles/understanding-quakes-fas...).
I think a Steve Yegge post mentioned the equivalence of the a[5] == 5[a] principle but I can't seem to find any reference online expanding on this - anyone care to elaborate on this principle and/or possibly link the post if it actually exists?