Thomas Fuchs
Hi, I'm Thomas Fuchs. I'm the author of Zepto.js, of script.aculo.us, and I'm a Ruby on Rails core alumnus. With Amy Hoy I'm building cheerful software, like Noko Time Tracking and Every Time Zone and write books like Retinafy.me.
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Valid JavaScript or not?

May 28th, 2010 
1 + + 1              // => 2
1 + - + 1            // => 0
1 + - + - + 1        // => 2
1 + - + - + - + 1    // => 0
1 + - + + + - + 1    // => 2
1 + / + + + / + 1    // => 1/ + + + /1

Sure, but what about this?

1 + / + / + / + 1    // => ?