Learning objectives
Write code that finds the sum, average, maximum or minimum of the values in an array, guarding against an array with no elements
Write code that decides whether at least one element or every element has a property, counts the elements that have it, or returns the index of the first or last such element
Write code that examines every pair of neighboring elements, or that uses a nested traversal to detect duplicate values
Write code that shifts, rotates or reverses the elements of an array in place, using a temporary variable so that no value is lost
Write code that builds a new array from selected or rearranged elements of an existing one, or that traverses two arrays in step
Choose between an indexed loop and an enhanced for loop for a stated array task, and justify the choice from what the algorithm must do
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