bind_rows and list names

[bramtayl]

It seems like, at the moment, bind_rows, when applied to a list, disregards name information. I've been doing things like this:

test = list(source_1 = data_frame(a = 1), 
            source_2 = data_frame(a = 1) )

1:length(test) %>%
  lapply(function(i)
  test[[i]] %>%
    mutate(name = names(test)[i]) ) %>%
  bind_rows

It seems like a straightforward solution would be to have extra argument which specifies the name of a column to contain list name information.

[hadley]

See also #825

[bramtayl]

A similar strategy might be used also be used for row names. Although list names might be more important because they often contain important information for joins etc.

[bramtayl]

Note also this was at one point a feature of rbindlist from data.table (idcol = TRUE)

[hadley]

Dplyr will always discard row names because I think they're a bad idea