Ensures all column names are unique using the approach found in
tidyr 0.8.3 and earlier. Only use this function if you want to preserve
the naming strategy, otherwise you're better off adopting the new
tidyverse standard with name_repair = "universal"
tidyr_legacy(nms, prefix = "V", sep = "")prefix Prefix to use for unnamed column
Separator to use between name and unique suffix
Character vector of names
df <- tibble(x = 1:2, y = list(tibble(x = 3:5), tibble(x = 4:7)))
# Doesn't work because it would produce a data frame with two
# columns called x
if (FALSE) unnest(df, y)
# The new tidyverse standard:
unnest(df, y, names_repair = "universal")
#> New names:
#> * x -> x...1
#> * x -> x...2
#> # A tibble: 7 × 2
#> x...1 x...2
#> <int> <int>
#> 1 1 3
#> 2 1 4
#> 3 1 5
#> 4 2 4
#> 5 2 5
#> 6 2 6
#> 7 2 7
# The old tidyr approach
unnest(df, y, names_repair = tidyr_legacy)
#> # A tibble: 7 × 2
#> x x1
#> <int> <int>
#> 1 1 3
#> 2 1 4
#> 3 1 5
#> 4 2 4
#> 5 2 5
#> 6 2 6
#> 7 2 7