Example Analysis of Swift and Fedora

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Swift is a general programming language that uses modern methods to build security, performance, and software design patterns. It aims to be the best language for a variety of programming projects, from system programming to desktop applications, and to cloud services. Read on to learn about it and how to try it in Fedora.

Safe, fast and expressive

Like many modern programming languages, Swift is designed to be more secure than C-based languages. For example, variables are always initialized before they are used. Check whether arrays and integers overflow. Automatic memory management.

Swift puts the intention in the syntax. To declare a variable, use the var keyword. To declare a constant, use let.

Swift also guarantees that the object will never be nil. In fact, trying to use an object known as nil will result in a compile-time error. When using the nil value, it supports a mechanism called optional. Optional may contain nil, but use? Operator can be unpacked safely.

More features include:

Closure unified with function pointer

Tuples and multiple return values

Generics

To iterate quickly and succinctly over a range or collection

Structures that support methods, extensions, and protocols

Functional programming modes, such as map and filter

Built-in powerful error handling

Advanced control with do, guard, defer and repeat keywords

Try Swift

Swift is available in Fedora 28, and the package name is swift-lang. After the installation is complete, run swift and start the REPL console.

SwiftWelcome to Swift version 4.2 (swift-4.2-RELEASE). Type: help for assistance.1 > let greeting= "Hello world!" greeting: String = "Hello world!" 2 > print (greeting) Hello worldview 3 > greeting= "Hello universe!" error: repl.swift:3:10: error: cannot assign to value: 'greeting' is a' let' constantgreeting = "Hello universe!" ~ ^

Swift has a growing community, and in particular, a working group is working to make it an efficient and powerful server-side programming language.

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