On Aug 20, 2013, at 14:41, ivo welch <ivo.we...@anderson.ucla.edu> wrote:
> A second enhancement would be a "smart string", which knows that
> everything inside {{...}} should be evaluated.
I think one the HTML templating libraries (whisker or mustache or some such)
provides something not unlike this. Perhaps take a look.
>
> stopifnot( is.matrix(m), "m is not a matrix, but a {{class(m)}}" )
>
>
> my own programming variant looks even nicer,
>
> is.matrix(m) %or% "m is not a matrix but a {{class(m)}}"
>
> but requesting base R to add the %and% and %or% (or, better yet, 'and'
> and 'or') operators by default would be pushing my luck.
Does %or% throw an error or is this wrapped in something else?
The former seems rather perl-ish, but the latter might suggest you look into
the || and && operators if you only know their single counterparts.
Michael
>
> /iaw
>
>
> ----
> Ivo Welch (ivo.we...@gmail.com)
>
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