Nothing
#########################################################################################
## returns all the positions in a where b is found.
#########################################################################################
vecIn <- function(a, b)UseMethod("vecIn")
vecIn.default <- function(a, b)
{
which(Reduce('+', lapply(seq_along(y <- lapply(b, '==', a)), function(x){y[[x]][x:(length(a)-length(b)+x)]})) == length(b))
}
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