[Rd] all.equal.list() sometimes fails with unnamed and named components (PR#674)

[Peter Dalgaard BSA]

Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at> writes:

> Maybe we should change this as follows: if either of the two lists has
> names, work though the named components.  Warn about the ones not
> present in both.  Compare the ones present in both.  Then get rid of all
> named components and compare what is left in positional order.
> 
> As I said, I am not sure that this is really what we want.
> 
> Comments?

I think you might be right, and also that this is an easy thing to
implement. Then we'd have

all.equal(list(a=1,b=2,3,4),list(3,b=2,4,a=1)) == TRUE

Right?

However, BigBrother has

> all.equal(list(a=1,b=2,3,4),list(3,b=2,4,a=1)) 
[1] "Names: 2 string mismatches"
attr(, "continue"):
[1] T

> all.equal(list(a=1,b=2,3,4), list(a=1,b=2,4,3))
[1] T

..which does look like a "compatible bug"

Hmm. Maybe one wants positional matching in any case? But then, what
is the named-component extraction about??

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
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