[R] hashing using named lists
Prof Brian Ripley
ripley at stats.ox.ac.uk
Thu Nov 18 18:50:40 CET 2004
On Thu, 18 Nov 2004, ulas karaoz wrote:
> hi all,
> I am trying to use named list to hash a bunch of vector by name, for
> test = list()
> test$name = c(1,2,3)
> the problem is that when i try to get the values back by using the name, the
> matching isn't done in an exact way, so
> test$na is not NULL.
> is there a way around this?
?match on the names
> Why by default all.equal.list doesnt require an exact match?
What do you mean by that? It (by default or not) tests all the
attributes, including the names:
test <- list(name=1:3)
test2 <- list(na=1:3)
 "Names: 1 string mismatches"
Now, all.equal does not require an exact match, deliberately: that is what
identical() is for:
> How can I do hashing in R?
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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