fct_c() should not require a list as an argument

[AmeliaMN]

Related to this issue.

If you have the following data,

ds <- factor(c(rep("Male", times=2), rep("Female", times=4), rep("Gender non-conforming", times=2)))
test <- ds[1:4]
train <- ds[5:8]

The base c() does not work as expected:

c(test, train)
[1] 3 3 1 1 1 1 2 2

but you can list() and unlist()

unlist(list(test, train))
[1] Male                  Male                  Female                Female                Female                Female               
[7] Gender non-conforming Gender non-conforming
Levels: Female Gender non-conforming Male

That's annoying! I like fct_c() better because then I don't have to type unlist(), but I still have to give a list.

fct_c(list(test, train))
[1] Male                  Male                  Female                Female                Female                Female               
[7] Gender non-conforming Gender non-conforming
Levels: Female Gender non-conforming Male

I wish I could just fct_c(test, train).