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def isSorted[A](as: Array[A], gt: (A,A) => Boolean): Boolean = {
def loop(n:Int) : Boolean =
if (n >= as.length - 1) true
else if (gt(as(n), as(n+1))) loop(n+1)
else false
println(isSorted[Int](Array(1,2,3), _<_))
println(isSorted[Int](Array(3,1,2), _<_))
println(isSorted[Int](Array(), _<_))
println(isSorted[Int](Array(1), _<_))
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