Is there a function \x -> (x, x) in standard libraries?

[Tony Morris]

I like dup and yes I have written this function hundreds of times.

dup =  join (,)

Would be good to have it in base.



On Thu, Jul 18, 2019 at 5:16 PM Henrik Nilsson <
Henrik.Nilsson at nottingham.ac.uk> wrote:

> On 07/17/2019 12:26 PM, Andreas Abel wrote:
> > On 2019-07-16 23:21, Dan Burton wrote:
> >> +1 for "dup", if it is to be included at all.
> >
> > Same here.  --Andreas
>
> And +1 from me. It's a well established name in the literature.
>
> /Henrik
>
>
>
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