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Re:Stochastic, Nerdtastic Restaurant Bill Splitting by renwick on Wednesday July 18, 2012 @04:59AM (#4259975)
Note the dreadful UI on their app implementation! (You type something like '100:5,25,60' and invite someone to guess a number on each round)

Why wouldn't they do something like:

1. Enter the subtotal (becomes permanently printed at the top) 2. Enter successive item amounts, after each entry the app says 'pay' or 'continue'

Re:Stochastic, Nerdtastic Restaurant Bill Splitting by dreeves on Wednesday July 18, 2012 @05:16AM (#4260007)
True. The historical reason is that it was (well still is) originally a general biased coin flipper where you could enter any expression that evaluated to a probability. Then we added syntactic sugar for the case of restaurant bill splitting.

UI improvements welcome! Bethany has it on github: https://github.com/bsoule/Expectorant