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ungroup should do a copy but does not #54

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christophsax opened this issue Sep 12, 2017 · 0 comments
Closed

ungroup should do a copy but does not #54

christophsax opened this issue Sep 12, 2017 · 0 comments

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@christophsax
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@christophsax christophsax commented Sep 12, 2017

library(dplyr, warn.conflicts = FALSE)
library(dtplyr)
suppressPackageStartupMessages(library(data.table))

gdt <- data.table(a = 1:4, b = c(1, 1, 2, 2)) %>% 
  group_by(b)

groups(gdt)
#> [[1]]
#> b

dt <- gdt %>% ungroup()

groups(gdt)
#> NULL
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