Hi r-devel
If you define a function named `show` or attach a package with an exported
`show` function, then printing/vieweing S4 objects breaks. This is probably
because the `print` function calls `show`, which is now masked.
Example:
show <- function() {}
> setClass("Person", slots = list(name = "character"))
> tom <- new("Person", name = "Tom")
> tom # error
> methods::show(tom) # works
The error was a surprise to me because I was under the assumption that
`show` would be namespaced and therefore should not break.
I'm wondering if this is intended behaviour, or if this is a problem. My
intuition, and Hadley agreed on Twitter, is that defining a `show` method
should not have such a grave effect on printing S4 objects.
Thanks
---
http://deanattali.com
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