[R] Does R have a "const object"?

[Thomas Lumley]

Actually, you can do this using locked bindings.  Look at ?lockBinding

Locked bindings are how namespaces get const function definitions, and
active bindings (on the same help page) are how R CMD check notices
that you are using T and F when you mean TRUE and FALSE.

   -thomas


On Wed, Mar 16, 2011 at 1:52 PM,  <rex.dwyer at syngenta.com> wrote:
> Cheer up! R is a step closer to that concept than the old FORTRAN compilers that couldn't even guarantee that 37 was a constant if used repeatedly in a subroutine call.
>
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Uwe Ligges
> Sent: Tuesday, March 15, 2011 2:23 PM
> To: xiagao1982
> Cc: r-help
> Subject: Re: [R] Does R have a "const object"?
>
>
>
> On 15.03.2011 15:53, xiagao1982 wrote:
>> Hi, all,
>>
>> Does R have a "const object" concept like which is in C++ language? I want to set some data frames as constant to avoid being modified unintentionally. Thanks!
>
>
> Although there is almost never a "No" in R, the best short answer is: "No".
>
> Best,
> Uwe  Ligges
>
>
>>
>>
>>
>> xiagao1982
>> 2011-03-15
>>
>>       [[alternative HTML version deleted]]
>>
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>
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-- 
Thomas Lumley
Professor of Biostatistics
University of Auckland