Proposal: improve the Data.Tree API

[Milan Straka]

Hi Daniel,

> -----Original message-----
> From: Daniel Trstenjak <daniel.trstenjak at gmail.com>
> Sent: 28 Feb 2014, 15:22
>
> > But maybe it would be better to have lookupTreeBy instead of findTree --
> > when you see lookupTree and lookupTreeBy, it is quite obvious how they
> > differ. If I saw lookupTree and findTree, I would have to see the docs
> > to find the difference.
> 
> Why then not going with the shorter 'findTree' and 'findTreeBy'?

we are using mostly lookup in containers. Also lookup would be more
consistent with Data.List.lookup (versus Data.List.find).

Cheers,
Milan