Swift Programming Language Part 8 (Subscripts)

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This is another quick one. It moves quickly so make sure pause and take time to understand it. Review it a couple of times. Voice any questions in the comments below.
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Nice presentation keep up the good work!!!

yonasaddis
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Hey skip,
I am trying to get into coding and after this 8th tutorial I thought id ask, a lot of functions and built in operators throughout this course dont work in my playground. For example, I cant import Cocoa, or use functions like "mutating" is this just because the language is changing? or may it have to do with the fact that I am in IOS apps so it imports "UIkit" right off the bat instead of Cocoa?
Also, If these videos are outdated do you have/ know of anymore more recenttutorial courses I can watch?
thanks, really enjoying your tutorials.

chrismoore
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Hey, thanks for the tutorials, one question though... why does it loop all over again every time you try to access a specific index in the array, aren't the values already in the array, why does it call the randomizer and execute it all over again each time? thanx 

ritaamro
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bad teaching by pulling in not only advance swift writings but OJ C stuff into subscript explanation

chanuka
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