Sort array of dictionary by date swift 4
Sort array of dictionary by date swift 4. The job is to find the index of the first dictionary that contains a specific key and value pair. The latest solution that I found after lots of digging throughout Stack Overflow is: //This block of code used to convert object models to json string. Please keep in mind that Swift’s dictionary data structure can not be stored sorted by keys in memory. If you wanted the indices of the three things themselves, it would be something like enumerate(ans["dinner"]), or, if you wanted to access via the indices, you could do it like: ans["dinner"]?[0], which would return you the first element of the array stored You can create an array of tuples from your dictionary sorting it by its values as follow: Xcode 9 • Swift 4 or Xcode 8 • Swift 3. 2. Hot Network Questions Nov 6, 2020 · struct DateStruct { let date: Date let values: [Double] } var dateStructsArray: [DateStruct] = [] //Populate your array in whatever way makes sense Then sorting it is as simple as using a single call to sorted() Your code might look like this: let sortedDateStructs = dateStructsArray. [self. checking such that dicArray. Feb 20, 2018 · How to sort an array of dictionary in swift 4. @Dschee flatMap will either flatten a 2D array into a 1D array or remove nil values, not both. Jun 21, 2019 · You have to sort your array before calling configureCell. Use this when the order of the items is important. Then sort on whatever property you want. } /*. 1 } Sort Array of Feb 11, 2015 · return n1 < n2. But returns unsorted Dictionary. rank } If for whatever reason you do need arrays with the Jan 3, 2021 · Text(item. I am trying to sort an array based on date and time , I can successfully sort the array based on date both time is coming as another value in dictionary. That's not to say that you can't get an array of keys from the dictionary and then sort that array so you can access the values in a specific order, but that's very different from worrying about trying to sort an unordered collection. keys() to get an array of keys and then sort the array based on the values. This is my array of dictionary from which I have to sort array according to dictionary postTime value. We can do that by: otpInputView. 2 Examples. yyyy" format. 2)second step: I want to split this dictionary in two array, one for value and one for keys thanks. Time value comes in key "starts" as string '"HH:mm"' format. First, make a new array of strings called keysArray. start > p2. reduce(). Now keysArray should be an array of the keys. Dec 31, 2016 · As @Alexander writes, use a struct: if the keys are not static, the sorting above is very fragile w. Here's an example: let levelNames = [Int:String](uniqueKeysWithValues:levels. Hot Network Questions Aug 22, 2018 · The method Dictionary. You can sort by keys in the closure, then simply map over the resulting tuples to get the values only. Second, loop over your array of dictionaries and add all the keys to the newly created array. 0 For Raspberry Pi Zero/1/2/3 Apr 2019 A Big Update on Swift 4. first! } This sorts the keys by lexicographical order. Follow asked Dec 8, 2016 at 19:44. Ask Question Asked 5 years, 10 months ago. let sortedDictKeys = dict. Using append() The append() method adds an element at the end of the array. – Hamish. The time and space complexity of the sort cannot be guaranteed as Nov 19, 2023 · Query sorting can be done in two ways: a simple option that allows just one sort field, and a more advanced version that allows an array of a new type called SortDescriptor. let index = myDictionary. name. Dec 9, 2016 · arrays; swift; sorting; date; Share. let fruitsDict = ["apple": 5 Aug 10, 2016 · I have the following code which sort the array of dictionary alphabetically in ascending order. JavaScript Nov 20, 2015 · 1. Mar 7, 2015 · 5. Swift - Sort different arrays accordingly to date Dec 18, 2023 · 1. Swift Array provides different methods to add elements to an array. We can simplify this by defining a type alias for the elements of the array. What you probably want to use is sorted(), which does not modify the original array and returns a new sorted array: let aRes = aSoundTracks_Filtered. Then: Convert it to an array. 2 Using the map () method. Aug 12, 2013 · 1. – Joakim Danielson Apr 13, 2022 at 15:34 Nov 4, 2017 · Also you can sort your dictionary the same way you would sort an array with . October 4, 2017. sorted {. Code : Apr 19, 2023 · 1 The Fundamentals. MM. [[Int?]]) it'll choose to flatten it to 1D (e. Hot Network Questions Jan 4, 2015 · 4. It is discussed in this question. sort { $0. toSorted() with a custom sorting (which compares two elements of the array and returns a negative number if the first element should come before the second, a positive number if the second element should come before the first, or zero if they are equal. 3,938 3 33 53. We assign an empty array, an array of dictionaries, to users. Here is a function which returns a case-insensitive sorted array of keys (or any String values). May 17, 2020 · Also it seems like you are trying to group your dictionary's data by date. let jsonData = try JSONEncoder(). 0) == . As you may notice, I usually prefer to use safe code vs. 2 and Swift 5: let sortedByValueDictionary = myDictionary. The notation $0. It determines which to do based on if the 1st-level array's Element is an array or optional— so if you pass it a 2D array of optionals (e. sort(by: {(p1: Datas, p2: Datas) -> Bool in return p1. title, comment: "Sample Item title") static var previews: some View {. The data model is of type [Date : [CalendarEvent]], where CalendarEvent is a NSManagedObject subclass that I sort into a dictionary grouped on the events associated date attribute. Aug 25, 2022 · and I want to sort and has as first item of the array always the group with name Famiglia I have try like that but give me error: For-in loop requires 'GroupModel' to conform to 'Sequence' Aug 6, 2021 · The gist of the answers given above: You can iterate over a Dictionary in key order, and you can use that iteration order to read the keys and values into order-preserving data structures like Arrays or an OrderedDictionary. Now loop through your array that has the desired order in it. punteggio, order: . But I don't know why sortedArrayUsingComparator is not sorting the array and I am getting the older array back itself. You use Swifts Dictionary(grouping:by:) to achieve this. (elem1:(key: String, val: Int), elem2:(key: String, val: Int))->Bool in. How to Sort an array of dictionary arrays. You could use the . O(n log n), where n is the length of the sequence. Many attempts I have seen are with two. struct Player : Decodable {. 4 Example 4: Filtering out users below a certain age from an array of custom objects. Nate Cook. key }) { print("\(entry. Use a compactMap to return only the first time for each user (Because of the sorting you know that the first time for each user is their fastest) Sort the "first times" array by time. keys[index] Another possible solution would be to initialize an array with Sep 8, 2016 · Sorting arrays of dates. Something like: let sortedGroupedDictionary = Dictionary(grouping: dict) { getMonth(of Sep 21, 2015 · $0. st > $1. So when you write: a. So, the sorting actually has to be done on the basis of dates. compare($1. Here you Apr 26, 2023 · Swift’s built-in sorting functions, along with custom sorting closures and sort descriptors, provide a powerful set of tools for sorting arrays of numbers, strings, objects, and dictionaries. The very first thing you should do create a model type (w/ displayName, postedTime & message properties), then unpack your array of dictionaries into an array of that model type (while parsing those string dates into actual Date s). date < $1. e. 0. sorted(by: { $0. A dictionary is an unordered collection of keys and values. public mutating func sort(by areInIncreasingOrder: (Element, Element) -> Bool) Apr 4, 2024 · The custom function uses Object. Example let age = ["Ranjit": 1930, "Sabby": 2008 ] // sort dictionary by key in ascending order let sortAge = age. You have to use compare method: let results = Array(data). If the compiler complains about the types because it doesn't know that the value for this key is a String, you can cast like this (as said by Dec 11, 2018 · I am curious how to sort dates in form of Strings in an array. first! }) // this will give you a dictionary. sorted { $0["Score"]! < $1["Score"]! The most recommended solution is to decode the JSON directly into a custom struct. We will use the firstIndex(where:) method in this case: May 5, 2023 · This practical, straight-to-the-point article will walk you through some different ways to compute the number of times each element appears in a given array. So yes, you can sort it by keys but if you print it for example then the key order is again random. date property and we are arranging the objects to be in descending order using the . Dictionary already has a sorted method that takes a closure that defines the sorting function. The elements the array holds are of type [String:String]. So: First: Group dictionary values. for entry in Temps. OrderedAscending }) This extension can be used to make NSDate conform to Comparable: Nov 7, 2017 · These values are added from the sorted Array of objects into Dictionary using append method. Operations like grouping, filtering, and transforming values can now be performed in a single step, letting you write more Jul 10, 2015 · How can I sort a dictionary in Swift? My Dictionary declaration: var colorDictionary = Dictionary<Pixel, Int>() //pixel class stores RGB values of a pixel, Int stores the appearing times of the same color showing on the same image. <5 or let value = array[j-1]. category. Oct 31, 2020 · If you can not change the property type you would need to create a custom DateFormatter to parse your date strings and sort the resulting dates: extension Formatter {. //You need a Localizable. The closure should return true if $0 is ordered before $1, or false if it comes after. map {. public func sorted(by areInIncreasingOrder: (Element, Element) -> Bool) -> [Element] or. sorted(by: #05: Sorting Array and Dictionaries in Swift Sorting collections in Swift is straightforward thanks to the sorted(by:) function available in every object implementing Collection or Sequence . values) For a list of objects to be grouped by one of their properties: let objectGroups = Array(Dictionary(grouping:objects){$0. sort the array by userid and time. values) A Long Overdue Update on Swift 5. rank < $1. Jan 1, 2015 · The idea here is to use list of tuples of (key, value) pairs as dictionary has no scope for ordering while OrderedDict preserves the entry order. But I need to sort json data in ascending order(or descending order). items sortUsingComparator:^NSComparisonResult(id obj1, id obj2){. Mar 20, 2015 · I have an NSMutableArray than contains dictionary of string like this [[link: myurl, title:My title, pubDate: Wed, 11 Mar 2015 07:00:00 PDT], [link: my link, title: my title2 , pubDate: Fri, 20 Mar 2015 01:00:00 PDT]] I need to sort this array on pubDate key so the Latest event should come on top. count. Nov 4, 2018 · I wrote a test command line tool that uses both array-based matching of items (as per @Carpsen90's first solution) and my/Sweeper's dictionary-based matching, and found that the array-based version takes about 5x as long on a 1,000,000 element array of weekday names. How to sort an array dates in swift 4. map(\. A stable sort preserves the relative order of elements for which are In Increasing Order does not establish an order. Nov 3, 2017 · @Zord Sorry but your last statement isn't clear. static let date: DateFormatter = {. iosnewcareer iosnewcareer. Oct 5, 2016 · How to sort an array of dictionary in swift 4. sort({$0["lastModified"] > $1["lastModified"]}) Xcode says "could not find member subscript". Nov 28, 2017 · case sunday = 0, monday, tuesday, wednesday, thursday, friday, saturday. Each element of the array is a tuple composed of the key, value pair from the dictionary. init(grouping: array) {$0["groupID"]!} The result is a dictionary keyed by the value of the groupIDs: Apr 12, 2021 · typealias SomeDataArray = [[String: SomeData]] In chat it was explained what within the "last" element for each of these dictionaries can be defined as the one with the largest timeStamp value. strings file in your project that contains all your `title`. Viewed 4k times Jun 29, 2016 · Use the zip() function to combine the array of history objects and the array of date objects into an array of tuples. Also we must convert the keys to actual datetime object for the sort to work perfectly otherwise sorting on string based fields happen alphabetically. By default NSDate does not conform to Comparable protocol. Table Of Contents. init(identifier: "en_US_POSIX") formatter. st } The above code is for Swift 1. Jul 21, 2020 · 5. first! < $1. super. 2 Example 2: Filtering out empty strings from an array of strings. Aug 12, 2015 · 5. orderedDescending case. sort(using: [. Nov 4, 2017 · Also you can sort your dictionary the same way you would sort an array with . ex. var localizedTitle: String{. May 26, 2015 · Then, to sort, you use the sort () closure, which sorts an Array in place. So date comes as a string in format "yyyy-MM-dd" and time comes in as a string in format "HH:mm". Take a look at the code snippet below: let groupByCategory = Dictionary(grouping: deviceArray) { (device) -> String in return device. 3. Your problem is array subscripts are zero-based. runtime safety, and it should be verified that all dictionaries in the arrays of dictionaries indeed does contain the key "last", e. A common way dictionaries work under the hood is using hashing to get the values of keys meaning order doesn’t matter in terms of retrieval. – What you probably want to use is sorted(), which does not modify the original array and returns a new sorted array: let aRes = aSoundTracks_Filtered. index(myDictionary. The above implementation sorts the array in place, placing items not having the numero key at the end - if you want the opposite case, just Apr 10, 2015 · For example, using functional programming in Swift, you could do something like the following, which uses sorted to convert the dictionary to an array and then sort using the closure and then using DateFormatter to convert the strings to dates: let dictionary = [. let users: [[String:String]] = [] The type of the array is [[String:String]]. Dec 4, 2018 · Introduction. A good example for a type that doesn’t confirm to the Comparable protocol is Date. val < elem2. sort({ $0. May 15, 2018 · Here's a simple one-liner approach that might get you started: let d = Dictionary. But I got the sorted small letter key value after capital letters. 1 < $1. Swift sort an array of mixed object types according to date. I had seen several answers on SO but they did in a single dictionary I want to do that from different dictionary. There are three types of collections in Swift (and Objective-C) An array is an ordered list of items. Also, they weren't the right time format so I want to know how to sort it with the "dd. unsafe - that's the reason why the code checks for existance of the numero key on both dictionaries. ) In our example: The comparison function checks if the country value Feb 1, 2017 · 0. But Dictionarys aren't order-preserving, so don't use one if you care about the order. Aug 9, 2014 · Unlike ObjC, in Swift you have sorted() (and sort()) method that takes a closure that you supply that returns a Boolean value to indicate whether one element should be before (true) or after (false) another element. return true. The correct way is: var persons = [Dictionary<String, String>]() which is equivalent to: var persons = [[String : String]]() What your code does instead is to create an array filled in with an instance of Dictionary<String, String>, whereas I presume you want an empty instance of the array containing elements of Dictionary<String, String Add Elements to an Array. Nov 2, 2016 · I am trying sort an array of dictionaries according to a key which has date. So if we want to sort an array of Date, then we can use. filesAndProperties. 0 returning a sorted array is called "sort" again, but it is a (protocol extension) method now instead of a global function. The values are categorized into keys based on the first letter of object property. Sort a dictionary contained in an array. Loop through the dictionaries in your source array, and add each entry to your new dictionary, using your sort key as the dictionary key, and put the array entry as the value. $0. return NSLocalizedString(self. date]; }]; But this does assume that the date is stored as a NSDate rather a NString, which should be no problem to make/do. Sep 30, 2016 · let a5 = A(name: "Tim") let array = [a1, a2, a3, a4, a5] Let's say you want to create a Dictionary by grouping all the names by their first letter. I would make a Video class with properties videoID, rank, title, description, and image. Apr 18, 2023 · The last index where the score is less than 70 is 4 Dealing with deeply nested arrays. How do I sort an array of such dictionaries by values in a specific key? Apr 22, 2017 · I have an array called myArray in which dictionaries are added I want that dictionary to be sorted by time which is a key in dictionary. start }) After this you are good to go. get{. 3 Using a for loop. 0. var json = [[String:String]]() Then you can sort the array with. Third, sort sortedKeysArray as follow. r. sorted { $0. call it sortedArray. 0 means that you got the first dictionary field (in your case it's a name), while $0. There is no need for anyone to care about the order of a dictionary. Finally, we will construct the dictionary using Array. You will need to use a different data structure like an array to sort something. } Make sure you create dictionary using this type as a key for day value. dict in dict. let name : String. Most likely with only the last two numbers of the year. localizedTitle) var id: UUID = UUID() let title: String. Swift - need to sort an array of string days of week. return false. if key has values like "Jast", Apr 25, 2018 · If all values are String declare your array as. import Foundation. return [obj2. date compare:obj1. This function can sort, using insertion sort , any sequence of elements that conforms to the Comparable protocol and when no optional sorting function is Jul 6, 2014 · var filesAndProperties:Dictionary<String, Any>[]=[] //we fill the array later When I try sorting the array using. May 5, 2015 · Sort keys case-insensitive in Swift 2. Feb 15, 2020 · If you want a "sorted dictionary" (in quotes because, again, there's no such thing) you have to get the dictionary keys into an array, then sort that array, then iterate through the sorted keys pulling values from the dictionary into another array of values that are sorted by key. locale = . Jan 30, 2019 · You can group your objects first sorting them by date, then you can use collection's method reduce (into:) and check if the last array last element date property is in same day as the current element date. But if you want to do it anyways, Swift 4's new Dictionary initializers can help. Remember to follow best practices for array sorting, and don’t be afraid to experiment with different techniques to find the best solution for your Apr 13, 2022 · Iterate over the array instead of the dictionary when needed and use the array element to access the dictionary in the "right" order. The date format of time is "yyyy/MM/dd HH:mm:ss" Jun 6, 2014 · Just one line code to sort dictionary by Values in Swift 4, 4. Oct 22, 2017 · Working with arrays of dictionaries directly is going to be a type casting nightmare. Feb 25, 2016 · I want to sort that array according to latest post which is known by the post time. Jun 14, 2018 · var dates = [CustomDate]() I am getting the data from json in a dictionary in 6 key value pairs what I want is as you can see the photo below is printing the date and month. In the following example, we will work with an array whose elements are dictionaries. debugPrint("\(offset) : \(element)") that would assign an offset to each element which you can print out or use otherwise, in my example the output on the console would look like this: Oct 4, 2017 · Dictionary and Set Improvements in Swift 4. The dictionaries are declared: var namesDic = [String: [Name]]() var filteredNames = [String: [Name]]() Jul 6, 2019 · Sorting array of Dictionary by weekday name swift3. 1 means it's the second dictionary field (an array). Create a new, empty array of dictionaries for your sorted results. append(42) println(a[i]) you will get a runtime error, because first time around the loop you are subscripting a[1] when there is only an a[0]. So in your viewDidLoad method you should use something like this. let formatter = DateFormatter() formatter. the value. Unfortunately sorting a dictionary is harder to achieve. Jan 12, 2016 · Probably something like this, using sort: let sortedArray = itemsArray. sorted(by:) returns the keys and values of your original dictionary as an array of key-value pairs, sorted by the predicate you pass as an argument. sortedArrayUsingDescriptors( sortDescriptors ) The other key must be ordered in particular order specified by an array: let rarity = ["Special Dec 25, 2014 · Array(d) creates an array out of the dictionary. key < $1. KeyPathComparator(\. var isFavorite: Bool. For example, Mar 15, 2024 · The sort() method of Array instances sorts the elements of an array in place and returns the reference to the same array, now sorted. I did something like that but I want to split in two arrays now. In your code, you either need to do for j in 0. utf8)! You can’t sort a dictionary in any language. All in one it would give. g. Without any further ado; let’s get started. How can I do that here is my code. t. 1. 17 3 3 Sorting of array of dictionary with date Swift 3. If you had Feb 7, 2018 · How to sort an array dates in swift 4. 1 Example 1: Filtering out negative numbers from an array of integers. The result of the sort is still an array of tuples which can then be Dec 11, 2023 · Using Array "operations" you would need to: filter the array to include only the required distances. Jan 20, 2021 · Now we have the dictionaries $0 and $1, and we want to compare their single key (assuming all dictionaries have exactly one key). Complexity. If this is the case, and if you want them to Jan 4, 2015 · 4. Most likely I would leave them in the same array and sort them the right way. let sortedArray = json. After the customObjects array is sorted, each object is then printed out using a for loop to display the finished result! The sorted() method sorts a dictionary by key or value in a specific order (ascending or descending). Example: The below example uses the Custom Sort Function to sort a Dictionary by Value in JavaScript. I'm creating a calendar app and I'm in need of managing of a date array in order to provide data for a UITableView. The default sort order is ascending, built upon converting the elements into strings, then comparing their sequences of UTF-16 code units values. Sort dictionary by value in swift. value) edited Jul 21, 2020 at 15:58. answered Jul 21, 2020 at 12:37. 1 Using the reduce () method. Modified 5 years, 10 months ago. My target: I need the elements in the dictionary sorted by value (appearing times of colors) from high to low. sorted { (element0, element1) -> Bool in. startIndex, offsetBy: intIndex) myDictionary. date } Feb 17, 2017 · Call it sourceItemsDict. contains("last") }) is not true. To do this, you've got to cast an awful lot: //myArray starts as: [. 3 Example 3: Filtering out odd numbers from an array using a custom function. Map the array of tuples back to an array of history objects. sorted(by: ). contains(where: { !$0. map{($0["Id"]! as! Int, $0["Name"] as! Nov 30, 2015 · 10. Simply give the following code to print sorted keys. Given that you have everything set up properly, you should be able to get sorted array like this: let sortedArray = initialArray. The closure you supply takes two arguments (named $0 and $1), and returns a Bool. You may also use something like the following: //Sort the array of items by date. forward)]) Sep 15, 2016 · You just have to sort your dictionary keys and append each value (array) sorted to the resulting array 2D: Your final table view should look like this: var musicalGroups: [[String]] = [] var musicalTitles: [String] = [] override func viewDidLoad() {. It essentially says to sort the tuples according to the 2nd item, i. dates. property}. The keys appear to all be numbers. let dictionary = Dictionary(grouping: array, by: { $0. viewDidLoad() May 30, 2019 · if you need only to add the index, call the enumerated() method on an array, like e. Mar 13, 2024 · I'd like then to use this data into a List object, but I would like to have them ordered by "punteggio" so that the first item shown is "Spina". The code to do that might look something like this: Version 1 Jul 4, 2015 · So if you want, say the three "dinner" values in your dictionary, you would go dict[key], (in my first example it would be ans["dinner"]). Jul 23, 2016 · [EDIT2] Swift 4 added an initializer to Dictionary that will do this more efficiently: let numberGroups = Array(Dictionary(grouping:numbers){$0}. Jun 30, 2020 · To group all Device objects by category, we can initialize a dictionary by giving its initializer the source array and a closure that returns the grouping key. . 2, for Swift 2. Using the simple version, we might ask for our books to be provided in alphabetical order based on their title: @Query(sort: \Book. Nov 10, 2015 · 1) this is first step : I'm asking how to make this dictionary in order by value. sorted{ $0. And that time is in String. . if elem1. val {. sort { $0["itemName"] < $1["itemName"] } where "$0" and "$1" represent respectively, in the array, each dictionary and its successor. Jan 7, 2018 · In this case we are sorting by the . Thank Aug 29, 2015 · You cannot sort dictionaries as they do not have order, so I use array in my answer instead. As has already been answered, the point of a dictionary is that it is not sorted. Then: Sort the array. 2 For Raspberry Pi Zero/1/2/3 Jun 2018 A Small Update on Swift For Raspberry Pi Zero/1/2/3 Sep 2017 All about Concurrency in Swift - Part 2: The Future Jul 2017 All about Concurrency in Swift - Part 1: The Present May 2017 The sorting algorithm is guaranteed to be stable. let (offset, element) = arg0. value)") } Now since you want to sort by month as they are sorted in the year, you will need to tell your code what it means. 1 allows reference within the tuple. Note that steps 2 & 3 can be used together by calling sorted directly on the groupedDictionary. [Int?] One way to handle this is to advance the dictionary's startIndex by the integer that you wanted to subscript by, for example: let intIndex = 1 // where intIndex < myDictionary. title) var books: [Book] Dec 21, 2017 · Sort array of custom objects by date swift. You're going to have a hard time keeping all of those arrays in sync. dateFormat = "dd-MM-yyyy-HH:mm". Based on that you will append the object to the last collection of the result of you will append a new array with that element: struct Obj Sep 18, 2014 · The second sort is easy, so I can use the sort descriptor way, which works fine: let costSort = NSSortDescriptor( key: "cmc", ascending: false ) let sortDescriptors = [costSort] let sortedCards = cards. Jul 16, 2009 · 17. If it's rank, it'd look like this: let sortedVideos = videos. keys. I'm trying to use the sorting in the following way: var squadreSort = squadre. key }). "04-09-2015": 4, Jun 16, 2018 · How to sort an array dates in swift 4. The values are all coming correctly in the objects (obj1, obj2) though. 1. Context. Given that this will give this solution (retaining the keys) let results = testData. Is there any smart way to do it in swift. In the latest release of Swift, dictionaries and sets gain a number of new methods and initializers that make common tasks easier than ever. encode(requestData) let jsonString = String(data: jsonData, encoding: . key) \(entry. Swift - Sort different arrays accordingly to date array. Share Improve this answer Jun 26, 2017 · Gagan_iOS. Sort the array of tuples. That means that the first element of each tuple is the key you're looking for. enteredValues. jl dl fk cy ap ge yj wq gb ga