Coerce a list to keyvalue object

Description

x should be a list with properties descrobed in section "Details".

Usage

## S3 method for class 'list'
as.keyvalue(x, ...)

Arguments

Details

• All names of the list elements should be unique.

• All elements of the list should be named.

• All keys should be unique (a key should only be mappad to one value).

• All elements of the list should be atomic vectors.

Value

The function returns an object of class keyvalue (and list.

See Also

as.keyvalue

Examples

ex <- list(
 fruit  = c("banana", "orange", "kiwi"),
 car    = c("SAAB", "Volvo", "taxi", "truck"),
 animal = c("elefant")
)
as.keyvalue(ex)
is.keyvalue(ex)


# An invalid list (non unique names; not because of silly classification)
ex2 <- list(
 fruit  = c("banana", "orange", "kiwi"),
 car    = c("SAAB", "Volvo", "taxi", "truck"),
 animal = c("elefant"),
 fruit  = c("President_Obama")
)
as.keyvalue(ex2)

# An invalid list (non unique keys; kiwi appear twice)
ex3 <- list(
 fruit  = c("banana", "orange", "kiwi"),
 car    = c("SAAB", "Volvo", "taxi", "truck"),
 animal = c("elefant", "kiwi")
)
as.keyvalue(ex3)