Swift access fields in nested dictionary

Question

I've got to deal with a Dictionary like this, or more nested. How can I access fields like "twotwo" ? Or is there any better possibility to model such structure?

let nestedDict = [
    "fieldOne": "name",
    "fieldTwo": "name",
    "fieldThree":
        [
            [
            "twoOne": "some text",
            "twoTwo": true,
            "twoThree": 1e-40
            ],
            [
            "twoOne": "some text",
            "twoTwo": true,
            "twoThree": 1e-40
            ]
        ]
]

There are some arrays in between an nestedDict["fieldThree"][0][0]["twoTwo"] will fail — SnowMax
– SnowMax, Commented Oct 21, 2015 at 12:45

vadian · Accepted Answer · 2018-07-29 14:59:51Z

3

nestedDict is a Dictionary, you get fieldThree with

let fieldThree = nestedDict["fieldThree"] as! [[String:Any]] // [[String:AnyObject]] in Swift 2 and lower.

fieldThree is an Arrayof [String:AnyObject] dictionaries, you get the value of twoTwo of the first array item with

let twoTwo = fieldThree[0]["twoTwo"] as! Bool

You can even retrieve all values of key twoTwo in the array

let allTwoTwo = fieldThree.map { $0["twoTwo"] as! Bool }

edited Jul 29, 2018 at 14:59

answered Oct 21, 2015 at 12:47

vadian

286k32 gold badges378 silver badges379 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Swift access fields in nested dictionary

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related