CODEWITHSUNDEEP
arraysswifttableviewsections
Creative crypter
Creative crypter

Reputation: 1516

Swift - multidimensional array sort

In order to create table view programmatically i have a menu setup like below, it contains sections as well as cells.

var menu = [
    "section 1": [
        "point a",
        "point b",
        "point c"
    ],
    "section 2": [
        "point a",
        "point b",
        "point c",
        "point d",
        "point e"
    ],
    "section 3": [
        "point a"
    ]
]

struct Sections {
    var sectionName : String!
    var sectionObjects : [String]!
}

var sections = [Sections]()

for (key, value) in menu {
    print("\(key) -> \(value)")
    sections.append(Sections(sectionName: key, sectionObjects: value))
}

So i want it exactly inserted in this order (section 1 -> section 2 -> section 3).

But it is actually inserted in an other order(from print):

section 2 -> ["point a", "point b", "point c", "point d", "point e"]
section 1 -> ["point a", "point b", "point c"]
section 3 -> ["point a"]

I absolutely dont know why the order is changed in the menu array. Anybody can imagine why or have some suggestions?

Thanks and Greetings!

Upvotes: 1

Views: 577

Answers (2)

Code Different
Code Different

Reputation: 93191

That's because Dictionary has no order. You must sort the keys yourself before iterating over them:

for key in menu.keys.sort() {
    let value = menu[key]!
    sections.append(Sections(sectionName: key, sectionObjects: value))
}

Upvotes: 1

yesthisisjoe
yesthisisjoe

Reputation: 2035

Dictionaries in Swift don't have an order to them. So when you iterate through one, you won't necessarily encounter them in the same order that they were added.

Check out this answer for more detail: https://stackoverflow.com/a/24111700/3517395

Upvotes: 2

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