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Richard Heylen on Thu, 17 Oct 2013 21:42:53 +0200
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Re: gp/pari version of the "Map" datatype and "reduce" function
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- To: pari-users@pari.math.u-bordeaux.fr
- Subject: Re: gp/pari version of the "Map" datatype and "reduce" function
- From: Richard Heylen <richardheylen@gmail.com>
- Date: Thu, 17 Oct 2013 20:42:42 +0100
- Delivery-date: Thu, 17 Oct 2013 21:42:53 +0200
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- In-reply-to: <20131017181230.GA17124@yellowpig>
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I would strongly recommend that an initial value is passed in so that
the function is called once per element. T
On 17 October 2013 19:12, Bill Allombert
<Bill.Allombert@math.u-bordeaux1.fr> wrote:
> On Thu, Oct 17, 2013 at 01:11:18PM -0400, Charles Greathouse wrote:
>> I think "fold" is good and avoids clashes.
>
> There is the question of associativity.
> I suggest we make it strictly less associative.
>
> However to answer Richard, lots of GP functions fold automatically, or
> there are variants that do:
>
> ? vecmax([1,2,3])
> %2 = 3
> ? gcd([4,6,9])
> %3 = 1
> ? factorback([1,2,3,4])
> %4 = 24
>
> Cheers,
> Bill.
>