[Haskell-cafe] Re: [Haskell] Re: Trying to install binary-0.4

[Simon Marlow]

Bayley, Alistair wrote:
>> From: Simon Marlow [mailto:simonmarhaskell at gmail.com] 
>>
>> The lexicographical ordering would make 10.0 > 9.3.  In 
>> general, A.B > C.D 
>> iff A > C or A == C && B > D.  When we say the "latest" 
>> version we mean 
>> "greatest", implying that version numbers increase with time. 
>>  Does that help?
> 
> 
> Sort of. It's what I'd expect from a sensible version comparison. It's
> just not something I'd ever choose to call lexicographic ordering. IMO,
> lexicographgic ordering is a basic string comparision so e.g.
> 
> max "10.0" "9.3" = "9.3"
> 
> I'd call what you're doing numeric ordering. Does it have a better name,
> like version-number-ordering, or section-number-ordering (e.g. Section
> 3.2.5, Section 3.2.6)?

I've heard it called lexicographical ordering before, but I'm happy to call 
it by whatever name induces the least confusion!

Cheers,
	Simon