Tools for accessing the fields of a record.
A rcrd behaves like a vector, so length(), names(), and $ can
not provide access to the fields of the underlying list. These helpers do:
fields() is equivalent to names(); n_fields() is equivalent to
length(); field() is equivalent to $.
fields(x) n_fields(x) field(x, i) field(x, i) <- value
x |
A rcrd, i.e. a list of equal length vectors with unique names. |
x <- new_rcrd(list(x = 1:3, y = 3:1, z = letters[1:3])) n_fields(x) fields(x) field(x, "y") field(x, "y") <- runif(3) field(x, "y")
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