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- null nil in Swift - Stack Overflow
8 Swift’s nil is not the same as nil in Objective-C In Objective-C, nil is a pointer to a non-existent object In Swift, nil is not a pointer—it is the absence of a value of a certain type Optionals of any type can be set to nil, not just object types NULL has no equivalent in Swift nil is also called nil in Swift Nil has no equivalent
- How do I concatenate strings in Swift? - Stack Overflow
How to concatenate string in Swift? In Objective-C we do like NSString *string = @"Swift"; NSString *resultStr = [string stringByAppendingString:@" is a new Programming Language"]; or NSString *
- How does one declare optional methods in a Swift protocol?
415 In Swift 2 and onwards it's possible to add default implementations of a protocol This creates a new way of optional methods in protocols
- swift - How to get the current time as datetime - Stack Overflow
With Swift 5, Foundation offers many ways to get the hour value from a Date object According to your needs, you may choose one of the four following Playground code snippets
- swift2 - Swift: guard let vs if let - Stack Overflow
The Swift Docs on Control Flow explain the idea behind that: Using a guard statement for requirements improves the readability of your code, compared to doing the same check with an if statement
- How do I check if a string contains another string in Swift?
Swift’s String type is bridged seamlessly to Foundation’s NSString class If you are working with the Foundation framework in Cocoa or Cocoa Touch, the entire NSString API is available to call on any String value you create, in addition to the String features described in this chapter
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