Needs more test cases, having arrays with more than 4 elements.
This is definitely cheating.
I couldn't resist... :o) Sorry!!!
In an act of protest, this answer includes the oxford comma. ;)
Hear, hear, the only way to prevent lexical ambiguity is the Oxford comma. As proof, I submit a friendly panda (eats, shoots and leaves) versus an unfriendly guest (eats, shoot, and leaves).
Return a list sorted by number of occurrences
It dseon't mettar waht oedrr the lrettes in a wrod are.
Symmetry of vector
The sum of the numbers in the vector
Create different color vectors.
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