A list containing data.table, data.frame or list objects. At least one of the inputs should have column names set. ... is the same but you pass the objects by name separately.
use.names
If TRUE items will be bound by matching column names. By default FALSE for rbindlist (for backwards compatibility) and TRUE for rbind (consistency with base). Columns with duplicate names are bound in the order of occurrence, similar to base. When TRUE, at least one item of the input list has to have non-null column names.
fill
If TRUE fills missing columns with NAs. By default FALSE. When TRUE, use.names has to be TRUE, and all items of the input list has to have non-null column names.