drop_cols: Drop columns in 'data.table' by reference or returning a...
In m-dz/mdmisc:

Drop columns in data.table by reference or returning a copy.

1	drop_cols(dt, cols, modify = FALSE)

`dt`	`data.table` to process
`cols`	Column names to drop, vector of strings
`modify`	Boolean, indicating whether columns should be dropped by reference of a copy should be returned

require(data.table)
dt <- data.table(V1 = 1, V2 = 2, V3 = 3)
print(dt)
dt_dropped <- drop_cols(dt, c("V1", "V2"), modify = FALSE)
print(dt)
print(dt_dropped)
drop_cols(dt, c("V1", "V2"), modify = TRUE)
print(dt)