[R] Re: assigning with operator '='.

Thomas Lumley tlumley at u.washington.edu
Wed May 22 17:44:02 CEST 2002

On Wed, 22 May 2002, Rolf Turner wrote:

> I've just checked out Jens Oehlschlgel's posting as regards assigning
> with the ``='' operator.  Yep, the phenomenon described really does
> happen.  And yep, it sure seems ***very*** dangerous to me.

Yes. It's a bug, as I said yesterday. It happened with <- in previous
versions of R.  It only happens under fairly unusual circumstances, which
is why it wasn't fixed earlier.

> Mind you, using ``='' as the assignment operator strikes me as being
> dangerous anyhow.  Bad design decision by the S people (by John
> Chambers?) and R should ***not*** have followed suit, compatibility
> or no compatibility.

It's actually pretty harmless, since = is forbidden in most of the cases
where it would be ambiguous.


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