Use double loops to iterate through the array, comparing each element with other elements, and remove one if they are the same.
Use an auxiliary array to iterate through the original array and store unique elements in the auxiliary array.
Sort the array first, then go through the array and remove any duplicate elements.
Store the elements from an array in a hash table, iterate through the array to store unique elements in the hash table, and then return the elements from the hash table back into the array.
By employing the two-pointer method, one pointer traverses the array while the other pointer indicates the position of the current unique element. When encountering a duplicate element, it is skipped, and when encountering a unique element, it is placed in the designated position.
By using a flag array, loop through the original array. If the element is not flagged, add it to a new array and flag that element. Finally, return the new array.
