Write an object to a character string or recreate it from a character string.

Writes an ASCII text representation of an R object to a character string, or uses one to recreate the object. If applying this function to a data.frame, it will do this on each rows of given columns, and also transform columns between datetime and character.

ListUnpack(x, mutate = FALSE, vars = NULL)

ListPack(x, mutate = FALSE, vars = NULL,
  vars.time = vars(ends_with("Time")), tz = "UTC")

Arguments

x	An ojbect or a data.frame.
mutate	If TRUE, apply the function on the given columns. If FALSE, apply the function on the object.
vars, vars.time	A list of columns generated by vars(), a character vector of column names, a numeric vector of column positions, or NULL. vars.time is the columns names of datetime.
tz	a character string that specifies which time zone to parse the date with. The string must be a time zone that is recognized by the user's OS. If NULL, use the current time zone.

Value

Transformed object.

Examples

s <- flightscanner:::ListUnpack(LETTERS)
flightscanner:::ListPack(s)
#>  [1] "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" "Q" "R" "S"
#> [20] "T" "U" "V" "W" "X" "Y" "Z"
d <- flightscanner:::ListUnpack(iris, mutate = TRUE, vars = "Species")
d <- flightscanner:::ListPack(d, mutate = TRUE, vars = "Species")
d$Species <- unlist(d$Species)
head(d)
#>   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
#> 1          5.1         3.5          1.4         0.2  setosa
#> 2          4.9         3.0          1.4         0.2  setosa
#> 3          4.7         3.2          1.3         0.2  setosa
#> 4          4.6         3.1          1.5         0.2  setosa
#> 5          5.0         3.6          1.4         0.2  setosa
#> 6          5.4         3.9          1.7         0.4  setosa