Convert a data frame to a list suitable for JSON serialization

Converts a data frame into the two-part list structure that rdesk.js expects: a rows component (list of per-row named lists) and a cols component (character vector of column names). Empty or NULL data frames return empty containers rather than an error.

Usage

rdesk_df_to_list(df)

Arguments

df

A data frame to convert. NULL or zero-row data frames are handled gracefully.

Value

A list with two elements:

rows

A list of named lists, one per row.

cols

A character vector of column names.

See also

rdesk_plot_to_base64() for converting plot output.

Examples

result <- rdesk_df_to_list(head(mtcars, 3))
stopifnot(length(result$rows) == 3)
stopifnot("mpg" %in% result$cols)

# NULL input returns empty containers
empty <- rdesk_df_to_list(NULL)
stopifnot(length(empty$rows) == 0)