Proposal: Add these two handy functions to Data.List

Bryan O'Sullivan bos at
Fri Jul 2 17:53:09 EDT 2010

On Fri, Jul 2, 2010 at 1:59 AM, Conor McBride <conor at>wrote:

> The question for library designers is at what level to engage with
> this structure. In doing so, we should of course take care to
> protect Joe Programmer from the Screaming Heebie-Jeebies. I am not
> qualified to judge how best this is to be done, but I thought I
> might at least offer some of the raw data for that calculation.

I like Cale's proposal, and in fact it reminds me of something Duncan nudged
me on a few months ago:
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