optional-variables Questions
2
Solved
So here I have a basic setup
var preferenceSpecification = [String : String?]()
preferenceSpecification["Key"] = "Some Key"
preferenceSpecification["Some Key"] = nil
preferenceSpecification["Defau...
Banderilla asked 18/8, 2016 at 19:39
3
Solved
I would like to traverse the view controller hierarchy in Swift and find a particular class. Here is the code:
extension UIViewController{
func traverseAndFindClass<T : UIViewController>(...
Afterburning asked 13/9, 2014 at 22:1
3
Solved
Sometimes I find myself writing swift 2 code like this:
class Test {
var optionalInt: Int?
var nonOptionalInt: Int = 0
func test() {
if let i = optionalInt {
nonOptionalInt = i
}
// do more...
Neurath asked 15/8, 2015 at 21:8
9
Solved
Given the following in Swift:
var optionalString: String?
let dict = NSDictionary()
What is the practical difference between the following two statements:
optionalString = dict.objectForKey("So...
Hierarchize asked 7/9, 2014 at 9:7
2
Solved
It's my understanding that
var perhapsInt : Int?
This is automatically set to a .None value. And the below code snippet confirms that (no compiler errors)
class MyClass {
var num1: Int = 0
v...
Connor asked 15/11, 2015 at 11:10
3
Solved
I have a case where I want to check if an optional I have is Equal to a string.
First I have to unwrap it to check if it exists, then I want to check if it is equal to another string. However that ...
Nagaland asked 20/12, 2014 at 0:21
1
I am trying to fill the empty spaces generated by the use of Optional in the SPARQL query language. Are there any ways that I can achieve this?
The use of !bound on the optional variable generate...
Termite asked 1/11, 2013 at 9:5
2
Solved
Assume that i have a function like this below
It takes 3 parameters and 2 have optional values
private void myfunc (int a, int b=2, int c=3)
{
//do some stuff here related to a,b,c
}
now i want...
Relly asked 18/7, 2013 at 16:13
4
Solved
I have many concrete-structs and I want to designate fields as optional (present or not-present). Just wondering what ideas people have for achieving this. Here is an example struct (fields can be ...
Smog asked 21/3, 2011 at 14:32
2
Solved
I have an optional POD struct that will be contained inside a union.
boost::optional<> holds its type by value, so I thought this could work:
union helper
{
int foo;
struct
{
char basic...
Tayyebeb asked 12/1, 2011 at 20:53
3
Solved
What does the following mean?
Class.Function(variable := 1 + 1)
What is this operator called, and what does it do?
Uchish asked 15/10, 2008 at 14:17
1
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