list-transpose.md
In purrr: Functional Programming Tools

integer template requires exact length of list() simplify etc

Code
  list_transpose(x, ptype = list())
Condition
  Error in `list_transpose()`:
  ! Can't convert `result[[1]][[1]]` <double> to <list>.

Code
  list_transpose(x, ptype = list(integer()))
Condition
  Error in `list_transpose()`:
  ! Length of `ptype` (1) and `template` (2) must be the same when transposing by position.

simplification fails silently unless requested

Code
  list_transpose(list(list(x = 1), list(x = "b")), simplify = TRUE)
Condition
  Error in `list_transpose()`:
  ! Can't combine `result$x[[1]]` <double> and `result$x[[2]]` <character>.
Code
  list_transpose(list(list(x = 1), list(x = 2:3)), simplify = TRUE)
Condition
  Error in `list_transpose()`:
  ! `result$x[[2]]` must have size 1, not size 2.

can supply `simplify` globally or individually

Code
  list_transpose(x, simplify = list(c = FALSE))
Condition
  Error in `list_transpose()`:
  ! `simplify` contains unknown names: "c".

can supply `ptype` globally or individually

Code
  list_transpose(x, ptype = list(c = integer()))
Condition
  Error in `list_transpose()`:
  ! `ptype` contains unknown names: "c".

can supply `default` globally or individually

Code
  list_transpose(x, default = list(c = NA))
Condition
  Error in `list_transpose()`:
  ! `default` contains unknown names: "c".

validates inputs

Code
  list_transpose(10)
Condition
  Error in `list_transpose()`:
  ! `x` must be a list, not the number 10.
Code
  list_transpose(list(1), template = mean)
Condition
  Error in `list_transpose()`:
  ! `template` must be a character or numeric vector, not a function.