Hi Martin,
On 5/26/20 06:24, Martin Maechler wrote:
...
What about remaining back-compatible, not only to R 3.y.z with
default recycle0=FALSE, but also to R 4.0.0 with recycle0=TRUE
What back-compatibility with R 4.0.0 are we talking about? The
'recycle0' arg was added **after** the R 4.0.0 release and has never
been part of an official release yet. This is the time to fix it.
*and* add a new option for the Suharto-Bill-Hervé-Gabe behavior,
e.g., recycle0="sep.only" or just recycle0="sep" ?
OMG!
As (for back-compatibility reasons) you have to specify
'recycle0 = ..' anyway, you would get what makes most sense to
you by using such a third option.
? (WDYT ?)
Don't bother. I'd rather use
paste(paste(x, y, z, sep="#", recycle0=TRUE), collapse=",")
i.e. explicitly break down the 2 operations (sep and collapse). Might be
slightly less efficient but I find it way more readable than
paste(x, y, z, sep="#", collapse=",", recycle0="sep.only")
BTW I appreciate you trying to accomodate everybody's taste. That
doesn't sound like an easy task ;-)
I'll just reiterate my earlier comment that controlling the collapse
operation via an argument named 'recycle0' doesn't make sense (collapse
involves NO recycling). So I don't know if the current 'recyle0=TRUE'
behavior is "the correct one" but at the very least the name of the
argument is a misnomer and misleading.
More generally speaking using the same argument to control 2 distinct
operations is not good API design. A better design is to use 2
arguments. Then the 2 arguments can generally be made orthogonal (like
in this case) i.e. all possible combinations are valid (4 combinations
in this case).
Thanks,
H.
Martin
> Switching to scheme (3) or to a new custom scheme
> would be a completely different proposal.
>>
>> At least I'm consistent right?
> Yes :-)
> Anyway discussing recycling schemes is interesting but not directly
> related with what the OP brought up (behavior of the 'collapse'
operation).
> Cheers,
> H.
>>
>> ~G
--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M1-B514
P.O. Box 19024
Seattle, WA 98109-1024
E-mail: hpa...@fredhutch.org
Phone: (206) 667-5791
Fax: (206) 667-1319
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