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Rewrite the function getElementAt() so that it returns the element nth in the array numbers, but only if there is an element at that...
X622: Element in Array if Exists
Rewrite the function getElementAt() so that it returns
the element nth in the array numbers, but only if there
is an element at that position (it exists). If the nth
element doesn't exist (e.g., outside of bounds), then the
function should return the third argument passed to the
method, the value in notFound.
Examples:
getElementAt({89,90,91},0,-1) -> 89
getElementAt({89,90,91},4,-99) -> -99
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