Say I have two lists:

list.a <- as.list(c("a", "b", "c"))

list.b <- as.list(c("d", "e", "f"))

I would like to combine these lists recursively, such that the result would be a list of combined elements as a vector like the following:

[[1]]
[1] a d

[[2]]
[1] a e

[[3]]
[1] a f

[[4]]
[1] b d

and so on. I feel like I'm missing something relatively simple here. Any help?

Cheers.

r elementwise-operations
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