Not only are optionals safer and more expressive than nil pointers in Objective-C, they are at the heart of many of Swift’s most powerful features. Using optionals is similar to using nil with pointers in Objective-C, but they work for any type, not just classes. Optionals say either “there is a value, and it equals x” or “there isn’t a value at all”. Swift also introduces optional types, which handle the absence of a value. You can use a tuple to return multiple values from a function as a single compound value. Tuples enable you to create and pass around groupings of values. In addition to familiar types, Swift introduces advanced types not found in Objective-C, such as tuples. Swift also provides powerful versions of the three primary collection types, Array, Set, and Dictionary. Swift provides its own versions of all fundamental C and Objective-C types, including Int for integers, Double and Float for floating-point values, Bool for Boolean values, and String for textual data. However, the retain cycle memory leaks prevail in Swift. That is why the extensive leaks of memory when iOS development by means of this language are impossible. In Swift, this can be done in a single line: print("Hello, world!")Įxecute this program using Swift IBM Sandbox on any OS (Windows, macOS, Linux or even in Android). Swift, if compared to Objective-C, is more unified so that its ARC is complete for such code paths as procedural and object-oriented. Tradition suggests that the first program in a new language should print the words "Hello, world!" on the screen. Swift does not need a separate library import to support functionalities like input/output or string handling.Swift unifies the procedural and object-oriented portions of the language.Swift provides seamless access to existing Cocoa frameworks.Swift is a fantastic way to write iOS and OS X apps.Swift provides Objective-C like syntax.Swift provides modern programming features. ![]() Swift makes use of safe programming patterns.Swift’s clean slate, backed by the mature and much-loved Cocoa and Cocoa Touch frameworks, is an opportunity to reimagine how software development works. Swift adopts safe programming patterns and adds modern features to make programming easier, more flexible, and more fun. IBM announced its Swift Sandbox website, which allows developers to write Swift code in one pane and display output in another. Initially a proprietary language, version 2.2 was made open source and made available under the Apache License 2.0 on December 3, 2015, for Apple's platforms and Linux. It underwent an upgrade to version 1.2 during 2014 and a more major upgrade to Swift 2 at WWDC 2015. Swift was introduced at Apple's 2014 Worldwide Developers Conference (WWDC). Swift took language ideas "from Objective-C, Rust, Haskell, Ruby, Python, C#, CLU, and far too many others to list". Swift is a new programming language for iOS, OS X, watchOS, and tvOS apps that builds on the best of C and Objective-C, without the constraints of C compatibility.ĭevelopment on Swift was begun in July 2010 by Chris Lattner, with the eventual collaboration of many other programmers at Apple.
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