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| author | chenbridge <chenbridge@Bridge-Mac.local> | 2016-02-23 15:06:40 +0800 |
|---|---|---|
| committer | chenbridge <chenbridge@Bridge-Mac.local> | 2016-02-23 15:06:40 +0800 |
| commit | 29555c9b70dbf5d6b2967215651d90c179c2466f (patch) | |
| tree | c0554f3a4c6eb8790322bab03fbfd697dd15ae20 /swift.html.markdown | |
| parent | 3453e953557a68eb752e8098ff90c255188b5668 (diff) | |
| parent | 54e95ab837454e35b80b2a1bd7a37d4ba4626946 (diff) | |
Merge remote-tracking branch 'adambard/master'
Diffstat (limited to 'swift.html.markdown')
| -rw-r--r-- | swift.html.markdown | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/swift.html.markdown b/swift.html.markdown index 46768375..e921e7ea 100644 --- a/swift.html.markdown +++ b/swift.html.markdown @@ -94,6 +94,8 @@ var unwrappedString: String! = "Value is expected." // same as above, but ! is a postfix operator (more syntax candy) var unwrappedString2: ImplicitlyUnwrappedOptional<String> = "Value is expected." +// If let structure - +// If let is a special structure in Swift that allows you to check if an Optional rhs holds a value, and in case it does - unwraps and assigns it to the lhs. if let someOptionalStringConstant = someOptionalString { // has `Some` value, non-nil if !someOptionalStringConstant.hasPrefix("ok") { |