Convert Model to dictionary (even model have a model in it)

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let cancelAction = UIAlertAction(title: &lt;#T##String?#&gt;, style: .cancel, handler: nil)

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alertController.addAction(cancelAction)
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@IBAction func doSomething()
@IBAction func doSomething(sender: UIButton)
@IBAction func doSomething(sender: UIButton, forEvent event: UIEvent)

[[NSProcessInfo processInfo] operatingSystemVersion]

import 'package:flutter/material.dart';

void main() {
  runApp(
    new MaterialApp(
      title: 'Hello World App',
      home: new myApp(),
    )
  );
}

class myApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Hello World App'),
      ),
      body: new Center(
        child: new Text(
          'Hello, world!'
        ),
      ),
    );
  }
}

keys, values)) # {'a': 2, 'c': 4, 'b': 3}
 
 
#make a function: def is the keyword for the function:
def to_dictionary(keys, values):
 
 
#return is the keyword that tells program that function has to return value   
return dict(zip(keys, values))
 
  
 
# keys and values are the lists:
 
keys = ["a", "b", "c"]   
 
values = [2, 3, 4]
                                
                                

 
def merge_two_dicts(a, b):
 
 
   c = a.copy()   # make a copy of a
 
   c.update(b)    # modify keys and values of a with the ones from b
 
   return c
 
 
 
 
 
a = { 'x': 1, 'y': 2}
 
b = { 'y': 3, 'z': 4}
 
 
print(merge_two_dicts(a, b)) # {'y': 3, 'x': 1, 'z': 4}
 
 

override func viewDidLoad() {
    super.viewDidLoad()
    // Swift block syntax (iOS 10+)
    let timer = Timer(timeInterval: 0.4, repeats: true) { _ in print("Done!") }
    // Swift >=3 selector syntax
    let timer = Timer.scheduledTimer(timeInterval: 0.4, target: self, selector: #selector(self.update), userInfo: nil, repeats: true)
    // Swift 2.2 selector syntax
    let timer = NSTimer.scheduledTimerWithTimeInterval(0.4, target: self, selector: #selector(MyClass.update), userInfo: nil, repeats: true)
    // Swift <2.2 selector syntax
    let timer = NSTimer.scheduledTimerWithTimeInterval(0.4, target: self, selector: "update", userInfo: nil, repeats: true)
}

// must be internal or public. 
@objc func update() {
    // Something cool
}

struct Person : Encodable {
    var name: String
    var age: Int
    var address: String?
}
    
    
let person = Person(name: "John Smith", age: 30, address: nil)
let dictionary = person.toDictionary()
print(dictionary) // Output: ["name": "John Smith", "age": 30]
    
    
    extension Encodable {
    func toDictionary() -> [String: Any]? {
        let mirror = Mirror(reflecting: self)
        var dictionary = [String: Any]()
        for child in mirror.children {
            guard let label = child.label else {
                continue
            }
            dictionary[label] = child.value
        }
        return dictionary
    }
}

Make sure to add encodable like this 

struct modelName : Encodsble

let categories = categoriesArray.map{ $0.toDictionary()  }

extension Encodable {
    func toDictionary() -> [String: Any] {
        let mirror = Mirror(reflecting: self)
        var dictionary = [String: Any]()
        for child in mirror.children {
            guard let label = child.label else {
                continue
            }
            dictionary[label] = child.value
        }
        return dictionary
    }
}

extension Encodable {
    func toDictionary() -> [String: Any]? {
        do {
            let encoder = JSONEncoder()
            let data = try encoder.encode(self)
            let dictionary = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any]
            return dictionary
        } catch {
            print("Error converting to dictionary:", error)
            return nil
        }
    }
}

month_conversion = {
“Jan” = “January”
“Feb” = “February”
“Mar” = “March”
“Apr” = “April”
“Jun” = “June”
}
# keys must be unique:
print(month_conversion[“Mar”])


Output”
           March

for (int i = 0; i < n; i++)
{
    if (valCount.ContainsKey(x))
        valCount[x]++;
    else
        valCount[x] = 1;
}

>>> stuff = {‘name’ : ‘Zed’, ‘age’ : 39, ‘height’ : 6 * 12 +1}
>>. print(stuff [‘name’])
Zed
>>> print(stuff [‘age’])
39
>>> print(stuff [‘height’])
74
>>> stuff [‘city’] = “SF”
>>. print(stuff[‘city’])
SF
                                
                                

def minus_key(key, dictionary):

shallow_copy = dict(dictionary)

del shallow_copy[key]

return shallow_copy