|Bill Allombert on Fri, 08 Mar 2013 15:20:19 +0100|
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|Re: PARI 2.6 syntax 2: [f(x)|x<-a,b(x)]|
On Fri, Mar 08, 2013 at 10:03:48AM +0000, Phil Carmody wrote: > --- On Fri, 3/8/13, Andreas Enge <firstname.lastname@example.org> wrote: > > On Fri, Mar 08, 2013 at 08:01:25AM +0100, Pascal Molin wrote: > > > Well @ is still available, no ? The email analogy is OK : "in the following > > > domain" > > > > Magma uses the keyword "in", which is quite reasonable. > > If we're brainstorming, \in springs to mind. \ is already an infix operator, and a \in b would read as a\inb, i.e. a division. > If we're on the topic of that operator, is there any reason it doesn't act as a predicate? > > ? excludes=[2,3,5] > %1 = [2, 3, 5] > ? [x^2|x <- [1..100],!x <- excludes] > *** at top-level: [x^2|x<-[1..100],!x<-excludes] The intent is for <- to be a generator not a predicate. Cheers, Bill.