'R - Combine two elements within the SAME list. Preferentially a purrr solution

I am looking for a purrr solution for the following problem:

Say, we have some list:

    list(     c("Hello",      "Well",   "You"  ),
              c("again",      "done,",  "annoy"),
              c("my friend!", "boy!",   "me!"  )      )

Now, I would like to to combine the the first two elements within that list.

My desired output is:

    list(     c("Hello",      "Well",   "You"  , "again",      
               "done,",  "annoy"),
              c("again",      "done,",  "annoy"),
              c("my friend!", "boy!",   "me!"  )      )

Appreciate your help! Thanks.

r dictionary tidyverse purrr

Solution 1:^[1]

I don't think you want a purrr solution, but if you insist for some workflow reason...

x <- list(c("Hello", "Well", "You"),
          c("again", "done,", "annoy"),
          c("my friend!", "boy!", "me!"))

library(purrr)
modify_at(x, 1, ~ c(., x[[2]]))

# which can simplify to...
x %>% 
  modify_at(1, c, .[[2]])

# or with more purrr!!
x %>% 
  modify_at(1, c, pluck(., 2))

But I would just do...

x[[1]] <- c(x[[1]], x[[2]])

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Solution 1	Adam

'R - Combine two elements within the SAME list. Preferentially a purrr solution

Solution 1:[1]

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Related Questions

Solution 1:^[1]