Re: [PATCH] describe-doc: clarify default length of abbreviation

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Bagas Sanjaya wrote:
> On 16/05/21 14.32, Anders Höckersten via GitGitGadget wrote:
> > @@ -139,8 +140,11 @@ at the end.
> >   
> >   The number of additional commits is the number
> >   of commits which would be displayed by "git log v1.0.4..parent".
> > -The hash suffix is "-g" + unambiguous abbreviation for the tip commit
> > -of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`).
> > +The hash suffix is "-g" + an unambigous abbreviation for the tip commit
> > +of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`). The
> > +length of the abbreviation scales as the repository grows, using the
> > +approximate number of objects in the repository and a bit of math
> > +around the birthday paradox, and defaults to a minimum of 7.
> 
> What is the birthday paradox then?

It's a probability fact that goes against common sense. In a romm with 23
people you are 50% likely to find two people with the same birthday.

https://en.wikipedia.org/wiki/Birthday_problem

-- 
Felipe Contreras



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