All Questions
52 questions
0
votes
2
answers
74
views
func argument with an Array of mixed types (protocol), then call a static method of the protocol
Here are my structures (I can have lot more, that why I need a generic way to do with MyProtocol):
protocol MyCustomCodable {
static func buildQuery()
}
struct A: MyCustomCodable {
...
}
...
0
votes
0
answers
30
views
How to cast KeyPath<CNContact, Array<CNLabeledValue>> to KeyPath<CNContact, Any>
I need to put KeyPath values in an array of type Array<KeyPath<CNContact,Any>>. However, \CNContact.phoneNumbers fails to cast to KeyPath<CNContact,Any>.
Here is my test code:
let ...
- 946
0
votes
1
answer
162
views
Swift 5: Merging Two Generic Functions with <T: BinaryInteger> & <T:BinaryFloatingPoint> with Output Type Specified
What I want to Work
My end goal is to have Array Data such as [Int], [UInt], [Float] passed through a generic function that converts any of these types and outputs the [UInt8] 0-255 values for pixel ...
0
votes
0
answers
399
views
The best way to convert Array<Int32> to Array<Int> in Swift
I have Array<Int32> with large size and I want to convert it into Array<Int>.
Then, I am using map function like this;
let int32array = Array<Int32>(0..<1000000)
let intarray = ...
- 91
1
vote
1
answer
185
views
C-style pointer/array casting in Swift?
Is there any way I can cast an array of different integer sizes to another array type?
For example, in C, I can do:
unsigned char byteArray[] = { 0x1, 0x5, 0xF, 0x3, 0xA5, 0x3, 0x8, 0x8, 0xAB };
...
- 190
0
votes
1
answer
853
views
Swift type-variable to generic-type-variable
The error I get is unsurprising, but how would I accomplish something like this in Swift?
let stringType = String.self
let stringArrayType = Array<String>.self
let stringArrayTypeFromVariable = ...
- 512
1
vote
1
answer
121
views
Swift: typecast output array in Collection where Iterator.Element == Foo
I have the following function, it iterates over an array of Foo, and creates a new array using the items in the original array, but with different colors:
extension Collection where Iterator.Element =...
- 5,707
0
votes
1
answer
42
views
How does Swift Array support valid Element subtype assignment?
I want to cast or assign a custom Swift Container Type to a "compatible" declared variable container-type like native Swift Array supports. The code below is a complete example with the problem ...
- 81
-1
votes
1
answer
214
views
Errors trying to convert type [Any] to JSON with Swift
I'm trying to convert an object type [Any] to a JSON or something I can use to access the attributes.
Steps:
I call a function from a library to connect to a bluetooth device and retrieve data from ...
2
votes
0
answers
98
views
Bridging between incompatible types in Swift using memory rebind
I have been trying to solve a problem in my app. I get an NSArray from an Objective-C API and need to read it as an array of double values in the Swift app.
So the bridging needed is between NSArray ...
0
votes
3
answers
107
views
convert value of type 'Result?' to type 'String'
I have problems to cast my array of type 'result' to an array of string. This is what I already tried:
EDIT:
I need the information as String type since I want to use the URL as image source.
swift4
...
- 536
1
vote
1
answer
137
views
How can I make an array that holds types?
I am trying to create an array that holds the class of the custom collectionView cell I would like to deque. Below I have provided an example of how I would like to use this array. cellType is a ...
user9226105
1
vote
2
answers
3k
views
Swift - How to cast Any to Array \ Dictionary?
I'm trying to parse a json which has an array with Strings, Ints and Arrays
So I'm to iterate on the json {["item1", 2, ["subItem1", "subitem2"] ]} members in the array:
func parse(json : [Any])
...
- 13.6k
-3
votes
2
answers
834
views
Swift: how to convert a [String:Any] array to a specific array
I have this simple Struct:
protocol DocumentSerializable {
init?(dictionary:[String:Any])
}
struct Item {
var title:String
var text:String?
var dictionary:[String:Any] {
...
- 1,934
0
votes
1
answer
64
views
Cast a [[[Double]]] back to [Double]
I have a downloaded JSON file. Within it, there are repeating objects that are either 1 of 2 types - either a [Double] or a [[[Double]]].
I am trying to use a Codable protocol for a custom struct to ...
- 529