There are multiple ways to store data in your iOS app but one of the best way is to use core data . also allows you to store your data within app bundle and your data to be retained on app launches.
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In this blog post, I will introduce some of useful tips and techniques of using swift mapping and flat mapping, you might already experienced the basic usage of swift map and flat map but in this blog we can see some additional benefits and areas where we can use the map and flat map to gain full advantage of swift higher order function efficiently.
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End of this blog you will be able to understand the Access control specifiers open, public,internal,file-private and private in swift 3.
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