| nDotArgs | R Documentation | 
count the number of ... arguments passed.
nDotArgs(...)
... | 
 ... arguments or real arguments in the call to the function which calls   | 
the number of ... arguments in the call to the
function which calls nDotArgs.
nargs.
myfun <- function(..., a=4) nDotArgs(...)
myfun()                 ## returns 0 
myfun(1:3,"bear")       ## returns 2 
myfun(a=5, 1:3, "bear") ## returns 2 (excludes a)
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