Nothing
vsetequal <-
function (x, y, multiple=TRUE) {
x <- as.vector(x)
y <- as.vector(y)
if(!multiple) {
all(c(match(x, y, 0L) > 0L, match(y, x, 0L) > 0L))
} else {
# Can get away with this 'cause set theory doesn't "allow" floats
length(x) == length(y) && identical(sort(x), sort(y))
}
}
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