Tests the behaviour of a mapper function
a mapper function
a vector of character test data
This is a test function to runs a mapper function over a set of strings
and reports which strings are mapped and what they are mapped to. It's mostly useful
to ensure that any regular expressions given to
mapper (i.e. when
re=TRUE) have the
right behaviour before using the mapper function to aggregate things from your data.
What the elements of
data are mapped to, if anything
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