How to Append to complex dictionary types in swift 3

Question

How to append some empty array values to the below dictionary.

var results:Dictionary<String, Array<Dictionary<String, Any>> = [:]

results["key"] = nil doesn't work for me.

I want to have a dictionary like

{
"key1" : [],
"key2" : [],
"key3" : []
}

And should be possible to add Dictionary<String, Any> later in the place of ()

Answer 1

First of all, your first line is illegal. It won't even compile. Please try always to show real code. So, your declaration might look like this:

var results : Dictionary<String, Array<Dictionary<String, Any>>> = [:]

Then to add an empty array to the dictionary, you would say:

results["key"] = []