iskm/learnxinyminutes-docs
1
0
Fork 0
mirror of https://github.com/adambard/learnxinyminutes-docs.git synced 2024-12-23 09:41:36 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Added nil-coalescing operator

Browse Source
This commit is contained in:
Kyle Rokita 2016-11-11 16:12:13 -08:00 committed by GitHub
parent d70ad72219
commit a19efad7fc
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
swift.html.markdown
View File

@ -104,6 +104,11 @@ if let someOptionalStringConstant = someOptionalString {
}
}
// The nil-coalescing operator ?? unwraps an optional if it contains a non-nil value, or returns a default value.
var someOptionalString: String?
let someString = someOptionalString ?? "abc"
print(someString) // abc
// Swift has support for storing a value of any type.
// For that purposes there is two keywords: `Any` and `AnyObject`
// `AnyObject` == `id` from Objective-C