Reorder array of Dictionary By swift - ios

Question

I'm working on ios app by swift!
An i need to display the data from the array of dictionary order by the price value.
How can i reorder this array
(
{
price = 269600;
userid = "facebook:851661711521620";
},
{
price = 294600;
userid = "facebook:851661711521620";
},
{
price = 1345600;
userid = "facebook:851661711521620";
},
{
price = 287600;
userid = "facebook:851661711521620";
},
{
price = 1344600;
userid = "facebook:851661711521620";
},
{
price = 1343600;
userid = "facebook:851661711521620";
},
{
price = 1333600;
userid = "facebook:851661711521620";
},
{
price = 1332600;
userid = "facebook:851661711521620";
},
{
price = 1322600;
userid = "facebook:851661711521620";
},
{
price = 322600;
userid = "facebook:851661711521620";
},
{
price = 302600;
userid = "facebook:851661711521620";
},
{
price = 300600;
userid = "facebook:851661711521620";
},
{
price = 291600;
userid = "facebook:851661711521620";
},
{
price = 282600;
userid = "facebook:851661711521620";
},
{
price = 299600;
userid = "facebook:851661711521620";
}
)
to be ordered by price from The highest to The lowest?
i need to display the data to be like this
Any ideas how can i do it Thanks!
Thanks!
Edited add some actual code.
self.currentBidDict = snapshot.value["current_bid_id"] as! NSDictionary
for(var i = 0;i <= self.currentBidDict.count - 1;i++){
self.currentBidDictReOrder.insertObject(self.currentBidDict.allValues[i], atIndex: 0)
println(self.currentBidDictReOrder)
}
Then after i printIn i got array above in the question.

Answer 1

There is a function, sort, that takes any sequence, and returns a sorted array. Since dictionaries are sequences of (key,value) pairs, you can pass the dictionary in to sort.
If what you pass in isn’t naturally sortable (i.e. the elements of the sequence are Comparable, which dictionaries aren’t), you need to also supply a closure telling sort how to order the elements. In your case, you want that closure to compare the value for a specific key in the dictionaries.
Finally, you want to sort by a value, but looking up a key in a dictionary returns an optional (because the key might not be there). But, this is fine! Because optionals have a < operator that works, so long as what the optional contains is comparable. Except, it looks like you’ve got a dictionary of Any or AnyObject (because you have both strings and integers in there), so you’ll have to covert them to something you can compare.
Put it all together and:
sorted(dict) { ($0["price"] as? Int) > ($1["price"] as? Int) }
You might want to tweak that as? a bit depending on what your dictionary actually contains. Also, I’d strongly suggest looking at creating a more strongly-typed struct and populating that with your data, rather than leaving it in dictionary form like this.

Answer 2

You can use the sort function in the following way:
var dict = [[
"price" : 1111,
"userid" : "facebook:851661711521620"
],
[
"price" : 12222,
"userid" : "facebook:851661711521620"
],
[
"price" : 144444,
"userid" : "facebook:851661711521620"
]]
// sort by price
dict.sort {
x, y in
let item1 = x["price"] as! Int
let item2 = y["price"] as! Int
return item1 > item2
}
And the output should be like this:
[[price: 144444, userid: facebook:851661711521620], [price: 12222, userid: facebook:851661711521620], [price: 1111, userid: facebook:851661711521620]]
I hope this help you.