Popularity
0.6
Declining
Activity
0.0
Stable
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1
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Monthly Downloads: 2
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags:
Data
Latest version: v0.1.1.0
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Do you think we are missing an alternative of data-function-meld or a related project?
README
Data.Function.Meld
Map the arguments and return value of functions.
General use:
f $* g1 $$ g2 … $$ gn *$ h = \x1 … xn -> h (f (g1 x1) (g2 x2) … (gn xn))
Examples:
on f g = f $* g $$ g *$ idcomparing f = compare $* f $$ f *$ idf . g = f $* g *$ id
Related work:
- Semantic Editor Combinators (Conal Elliott, 2008/11/24). Introduces composable editors for function arguments and return values.
- Pointless Fun (Matt
Hellige, 2008/12/03). Derives a similar operator named
~>. This operator composes an editor which can then be applied to the subject to edit. This better agrees with Conal's concept of Semantic Editor Combinators. In contrast,$*includes the subject as part of the editor, though you can write($* g1 $$ g2 … $$ gn *$ h)for an editor independent of the subject. Also,~>is right-associative whereas$*and$$are left-associative. - TypeCompose version 0.9.11
(Conal Elliott, 2016/01/15). Package including an implementation of
~>.