It has been brought to my attention that there are a number of the
functions that were added as part of the "iteration in the puppet language"
work that there isn't any kind of general agreement on their value.

I think the list of functions in question is:

  * map
  * reduce
  * filter
  * slice

The use cases for each of these come down to various forms of data
manipulation. Map, for instance, can be used to place a prefix or suffix on
some, or all of the elements of a list. Filter is used when only a subset
of elements is wanted. Slice is to produce groupings of elements in a list.
Reduce is the oddest one of the bunch, it is the actual "foreach" loop that
everyone is familiar with from languages with mutable variables, but in a
very different form.

Are these functions too much? Should they be left out?

-- 
Andrew Parker
[email protected]
Freenode: zaphod42
Twitter: @aparker42
Software Developer

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