@hackage matchable0.2

matchable

This package defines a type class Matchable, which provides zipMatch operation for zipping two values of a container type.

The zipMatch operation can fail. It returns the zipped value wrapped in Maybe. Specifically, zipMatch returns zipped value if and only if two arguments have the exactly same shape.

Example

>>> zipMatch [1,2] ['a','b']
Just [(1,'a'), (2,'b')]
>>> zipMatch [1,2,3] ['a','b']
Nothing

See examples also.