Checking for Missing Arguments

This function is identical to hasArg, except that it accepts the argument name as a character string. This avoids to have a check NOTE about invisible binding variable.

hasArg2(name)

Arguments

name	the name of an argument as a character string.

Examples

f <- function(...){ hasArg2('abc') }
f(a=1)
#> [1] FALSE
f(abc=1)
#> [1] TRUE
f(b=1)
#> [1] FALSE