Enumerate the unique and sorted values of a data.table
column, and
return the result as a list.
enumerate_character(table, colname)
A data.table
.
The name of a column in the table. This column should be of class character or factor.
A list with the sorted and unique values of the column; the original values of the column are the list names, and the value for each name is the number for that name (numbering starts at 1).