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Given a non-empty array of type int, return a new array containing the elements from the original array that came before thefirst 4 in...
X101: pre4
Given a non-empty array of type int, return a new array
containing the elements from the original array that came before
thefirst 4 in the original array. The original array will contain
at the least one 4. Note that it is valid in Java to create an array of
length 0.
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