multiple condition in r

is there a better way to have multiple condition in order to simplify my code. here is an example of what I'm talking about.

library(data.table)
test <- data.table(dx1 <- c("a", "b", "c"),
                   dx2 <- c("b", "c", "d"),
                   dx3 <- c("a", "f", "g"))

condition <- c("a", "b")

# This is what I want to simplify
test[,dx4 := ifelse(dx1 %in% condition|
                    dx2 %in% condition |
                    dx3 %in% condition, 1, 0)]

Thank you