Functions return [String:Any] and [AnyHashable:Any] , consumed in for-in loop, String conversions

gistfile1.txt

// Wrote this to test out how Arrays of Dictionaries are handled
// was surprised to see they become tuples in a for-in
// also some unintuitive string conversions

import Cocoa



func c() -> [String:Any]  {
    print ( "ok" )
    var keys = ["automaticDashSubstitutionEnabled": false, "automaticDataDetectionEnabled": false, "automaticQuoteSubstitutionEnabled": false, "automaticSpellingCorrectionEnabled": false, "automaticTextReplacementEnabled": false, "continuousSpellCheckingEnabled": false, "enabledTextCheckingTypes": "abc", "grammarCheckingEnabled": false] as [String : Any]?

    return keys!
    
}


// x is a [String:Array]
let x = c()

// but d is a tuple
for d in c() {
    // it comes in as a TUPLE
    let dict = d.0 as String
    
}


func f() -> [AnyHashable:Any]  {
    print ( "ok" )
    let keys = ["automaticDashSubstitutionEnabled": false, "automaticDataDetectionEnabled": false, "automaticQuoteSubstitutionEnabled": false, "automaticSpellingCorrectionEnabled": false, "automaticTextReplacementEnabled": false, "continuousSpellCheckingEnabled": false, "enabledTextCheckingTypes": "abc", "grammarCheckingEnabled": false] as [String : Any]?
    
    return keys!
    
}

var y = f()

for e in f() {
    // it comes in as a TUPLE
    let dict = e.0 as! String
    
}


func g() -> [AnyHashable:Any]  {
    print ( "ok" )
    let keys : [AnyHashable:Any]? = ["automaticDashSubstitutionEnabled": false, "automaticDataDetectionEnabled": false, "automaticQuoteSubstitutionEnabled": false, "automaticSpellingCorrectionEnabled": false, "automaticTextReplacementEnabled": false, "continuousSpellCheckingEnabled": false, "enabledTextCheckingTypes": "abc", "grammarCheckingEnabled": false]
    
    return keys!
    
}

var j = g()


for k in g() {
    // it comes in as a TUPLE
    let dict = k.0 //AnyHashable not convertible to String
    
}

// this gives us what we need
// g returns [AnyHashable: Any]
// from stackoverflow
var m = g() as NSDictionary as! [String: AnyObject]  as! [String : NSObject]

for s in m {
    // it comes in as a TUPLE
    let key = s.0
    print ("key \(key)")
    
}

//===================
var n = g() as NSDictionary as! [String: AnyObject]

for s in n {
    // it comes in as a TUPLE
    let key = s.0
    print ("key \(key)")
    
}

//===================
var o = g() as NSDictionary
print ("o is \(o)")

for s in o {
    // it comes in as a TUPLE
    let key = s.0
    print ("key \(key)")
    
}

//===================
var p = g() as Dictionary


for s in p {
    // it comes in as a TUPLE
    let key = s.0
    print ("key \(key)")
    
}

//===================

var q = g() as Dictionary as! [String: AnyObject]


for s in q {
    // it comes in as a TUPLE
    let key = s.0
    print ("key \(key)")

}

//====================

var t = g() as Dictionary

for s in t {
    // it comes in as a TUPLE
    let key = s.0
    print ("key \(key)")
    
}