split.data.table does not preserve attributes

[caneff]

data.table 1.10.5, R 3.2.2.

split.data.frame preserves attributes from the original, but split.data.table drops them.

library(data.table)
dt=data.table(x=1:10)
setattr(dt, "a", 5)
attr(split(dt,rep(1:2,each=5))[[1]],"a")
# NULL (expect 5)
attr(split.data.frame(dt,rep(1:2,each=5))[[1]],"a")
# 5

[jangorecki]

This should automatically works once #995 will be resolved.

[jangorecki]

Recent changes made by Matt in 3937881 solved this issue

library(data.table)
dt=data.table(x=1:10)
setattr(dt, "a", 5)
attr(split(dt,rep(1:2,each=5))[[1]],"a")
#[1] 5
attr(split.data.frame(dt,rep(1:2,each=5))[[1]],"a")
#[1] 5