Javascript returns non-repeated elements in the array.

This is part of the implementation structure pseudo-class type-of-type Code : <textarea id="runcode55343"></textarea>
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If the effect is not high, ask for help from the carefree experts. The following are the results of Customer Service (strong regular expression replacement ):
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Abcdreamer implementation (this implementation can filter duplicates in non-pure string arrays, I prefer ):
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Which of the following experts has a better implementation? Please let me know!
It seems that some people do not understand the difference between the norepeat function and the unique function. norepeat is to remove repeated elements in the array. If there are two A elements in the array, remove the two, and unique will remove one of them. The following is the implementation of the unique function:
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