
Returns number of rows affected by last :=
or set()
.
.Last.updated
Integer.
Be aware that in the case of duplicate indices, multiple updates occur (duplicates are overwritten);
.Last.updated
will include all of the
updates performed, including duplicated ones. See examples.
# NOT RUN {
d = data.table(a=1:4, b=2:5)
d[2:3, z:=5L]
.Last.updated
# updated count takes duplicates into account #2837
DT = data.table(a = 1L)
DT[c(1L, 1L), a := 2:3]
.Last.updated
# }
Run the code above in your browser using DataLab