I’d like to map a function on all keys in the dictionary. I was hoping something like the following would work, but filter cannot be applied to dictionary directly. What’s the cleanest way of achieving this? In this example, I’m trying to increment each value by 1. However this is incidental for the example – … Read more
I haven’t read too much into Swift but one thing I noticed is that there are no exceptions. So how do they do error handling in Swift? Has anyone found anything related to error-handling? 13 Answers 13
In Swift 2.0, Apple introduced a new way to handle errors (do-try-catch). And few days ago in Beta 6 an even newer keyword was introduced (try?). Also, knew that I can use try!. What’s the difference between the 3 keywords, and when to use each? 1 Answer 1
Does Swift have a #warning equivalent? It’s simply used to show a warning in Xcode’s own GUI I’m also interested in whether there’s a #error equivalent. Apple has said #pragma mark is coming soon, it could possibly be the same with this. 14 Answers 14
Is there a counterpart in Swift to flatten in Scala, Xtend, Groovy, Ruby and co? var aofa = [[1,2,3],[4],[5,6,7,8,9]] aofa.flatten() // shall deliver [1,2,3,4,5,6,7,8,9] of course i could use reduce for that but that kinda sucks var flattened = aofa.reduce(Int[]()){ a,i in var b : Int[] = a b.extend(i) return b } 14 Answers 14
How can I convert this string “2016-04-14T10:44:00+0000” into an NSDate and keep only the year, month, day, hour? The T in the middle of it really throws off what I am used to when working with dates. 18 Answers 18
I would like a for in loop to send off a bunch of network requests to firebase, then pass the data to a new view controller once the the method finishes executing. Here is my code: var datesArray = [String: AnyObject]() for key in locationsArray { let ref = Firebase(url: “http://myfirebase.com/” + “\(key.0)”) ref.observeSingleEventOfType(.Value, withBlock: … Read more
I’m trying to make a calculator of growth rate (Double) that will round the result to the nearest Integer and recalculate from there, as such: let firstUsers = 10.0 let growth = 0.1 var users = firstUsers var week = 0 while users < 14 { println(“week \(week) has \(users) users”) users += users * … Read more
I’m working on a money input screen and need to implement a custom init to set a state variable based on the initialized amount. I thought this would work, but I’m getting a compiler error of: Cannot assign value of type ‘Binding<Double>’ to type ‘Double’ struct AmountView : View { @Binding var amount: Double @State … Read more
I have an Objective-C project in Xcode 8 Beta 3. Since updating, whenever I try to build I receive the following error: “Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version … Read more
