Explanation: Total number of unique elements are 3, i.e[1,2,3] and Therefore return 3 after assigning [1,2,3] in the beginning of the array. Explanation: Total number of unique elements are 4, i.e[1,2 ...

Sareena was a senior editor for CNET covering the mobile beat, including device reviews. She is a seasoned multimedia journalist with more than a decade's worth of experience producing stories for ...

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You could have dozens of copies of the same images in your Photos library, taking up space on your phone and in your iCloud account. Luckily, Apple offers an easy-to-use little tool that lets you find ...

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