[Solved] Why can’t I sort AND deduplicate my Array?

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Shouldn’t ‘if’ allow me to remove duplicates?

No, sorting will not remove elements ever. It just changes the order.

Calling map(…) or forEach(…) will do the same: 1 to 1 in respect to the array’s elements.

Only filter(…) and reduce(…) will iterate and modify the number of items in the returned array.

BTW here’s your filter function:

function unique (value, index, self) { 
    return self.indexOf(value) === index;
}

myArray.sort(sortFunction).filter(unique)

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solved Why can’t I sort AND deduplicate my Array?