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iOS

Dictionary

Hello guys.

Firstly I would like to thank you for such a great opportunity to study with you.

I have some questions regarding Dictionaries material. Before asking this question I've read official swift guide at https://developer.apple.com and some additional resources.

Here is my question. What is the difference between these two empty dictionaries:

let test : [[ String:String ]] = [] and let test : [Dictionary<String, Any>] = []

Why in the first case they use double [[ ]] and in the second case the characters are mostly different? And why in the second example they added Dictionary word?

So, what I would like to see from you.

1) I would appreciate if you use human language) 2) Explain the difference between those 2 examples 3) Explain when each should be used 4) Provide your own examples with short explanations

A huge thank you in advance. I know I may sound silly, but I could not find the answer. Thank you again