#16291: Fixing associativity of FormalCompositeMap
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Reporter: sbesnier | Owner: sbesnier
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: categories | Resolution:
Keywords: associativity | Merged in:
FormalCompositeMap | Reviewers:
Authors: Sébastien Besnier | Work issues:
Report Upstream: N/A | Commit:
Branch: | 198085bda26743ebcb442f3b70698c3055395cd1
u/sbesnier/ticket/16291 | Stopgaps:
Dependencies: |
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Comment (by defeo):
> What is the reasoning behind `head()` and `tail()`?
That was my suggestion. I find ''first'' and ''second'' misleading, and
think they should be deprecated. ''head'' and ''tail'' are standard names
in functional languages, e.g. caml. Of course, this is standard
terminology for lists, where there is little ambiguity on who's the head
and who's the tail. As you point out, it is more confusing if you draw
arrows, but ''first'' and ''last'' is no less confusing than ''first'' and
''second'' in my opinion.
We could keep ''head'' and ''tail'', but reverse them to be consistent
with arrow diagrams (who says ''head'' should be first in applicative
order? We are making up the terminology, anyway). Or maybe ''head'' and
''shaft'', this is even more figurative! Or, if we want to stick with the
applicative order, what about ''first'' and ''then''? Whatever we choose,
I think we should take names that sound ridiculous enough to force the
user to read the docstring, rather than say "I know what that means".
--
Ticket URL: <http://trac.sagemath.org/ticket/16291#comment:9>
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