finding position number of an object within a list

Question

I have a list as follows:

list(c(TRUE, FALSE), TRUE, FALSE)

The list contains only one object with TRUE, all others are a mix of TRUE and FALSE. I want to work out the position number of the TRUE only object, in this case the answer is 2.

It sounds simple but I've failed so far.

Any ideas to solve this?

Answer 1

Use Position like this:

L <- list(c(TRUE, FALSE), TRUE, FALSE) # test data
Position(isTRUE, L)
## [1] 2