[R] function to compare lengths?

[Spencer Graves]

       Is there a function someplace to compare lengths?


       For example, if "longer object length is not a multiple of 
shorter object length", "a/b" issues a warning.  I'd like something with 
more flexibility in what is reported.


       Hadley Wickham's "testthat" and "assertthat" packages provide 
tools for testing and comparing objects, but I didn't see this.


       I'm starting to write "compareLengths(x, y, name.x=NULL, 
name.y=NULL, Source='', compFun=c('length', 'NROW'), 
action=c(comparable='', incomparable='warning'), maxChar=20, ...)". 
However, I'd prefer to use an existing function if I can find one that I 
feel is adequate.


       Thanks,
       Spencer