Swift2 Questions

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Extracting text from a string

Hi i have this error i keep coming up with that says value of type '[string]' has no member 'characters' here is my code:
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Using Realm with swift

I'm quite familiar with sqlite, but decided to try using realm for my next project. i'm having trouble with reading data from the db and deleting
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Swift - How is Instagram doing this?

I'm trying to achieve something similar to what instagram does when you click on 3 dots on the right of the screen under the picture. here's what
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