Ais ich dieses Buch im Jahre 1920 zum ersten lYIale herausgab, folgte ich vielfach geapBerten Wiinschen, die von mir fiir die Firma Siemens & Halske geschriebenen Technischen Anweisungen iiber Wechselstrom-Leistungsmessungen weitesten Kreisen in geschlossener Form zuganglich zu machen. Bei dieser Entwicklung konnten naturgemaB nur Siemens-Apparate in dem Buch be schrieben werden. Da diese jedoch nur als Ausfiihrungsbeispiele fiir den im iibrigen allgemein behandelten Stoff dienen und sich die Fabrikate anderer Firmen von den beschriebenen nicht prin zipiell, sondern nur in konstruktiven Einzelheiten unterscheiden, ist die Beschrankung auf ein Fabrikat belanglos. Diese Behand lungsweise bietet vielmehr den Vorteil, daB das ganze Gebiet an einer einheitlich durchgebildeten Reihe von MeBgeraten be sprochen werden kann und daB statt allgemeiner Angaben iiberall festliegende Zahlen gebracht werden konnen. Um den hierdurch gegebenen Gebrauchswert des Buches zu erhalten, sind auch in der zweiten und in der vorliegenden dritten Auflage als Aus fiihrungsbeispiele im allgemeinen nur Siemens-MeBgerate gebracht. Im iibrigen ist jedoch das Buch seit dem ersten Erscheinen voll standig umgearbeitet worden. In der vorliegenden drittw Auflage ist der Stoff nach allgemein giiltigen Gesichtspunkten neu aufgebaut und gegliedert worden. Hierdurch ergab sich die Moglichkeit, das Gemeinsame der ver schiedenen MeBgerate zusammenzufassen und einheitlich zu be handeIn. So wird beispielsweise erst die Bauart der verschiedenen MeBwerke der Leistungsmesser geschlossen behandelt, dann werden die Ausfiihrungsmoglichkeiten der Innenschaltung und endlich die fiir die Messungen erforderliche Berechnung der Kon stanten in allgemein geltender Form gebracht."

A comprehensive guide for programming enthusiasts who wish to gain a firm command of the fundamentals and advanced Swift concepts Key Features Sixth edition of this bestselling book, improved and updated to cover the latest version of the Swift 5.3 programming language Get to grips with popular and modern design techniques to write easy-to-manage Swift code Use core Swift features such as concurrency, generics, and copy-on-write in your code Book DescriptionOver the years, Mastering Swift has proven itself among developers as a popular choice for an in-depth and practical guide to the Swift programming language. This sixth edition comes with the latest features, an overall revision to align with Swift 5.3, and two new chapters on building swift from source and advanced operators. From the basics of the language to popular features such as concurrency, generics, and memory management, this in-depth guide will help you develop your expertise and mastery of the language. As you progress, you will gain practical insights into some of the most sophisticated elements in Swift development, including protocol extensions, error handling, and closures. The book will also show you how to use and apply them in your own projects. In later chapters, you will understand how to use the power of protocol-oriented programming to write flexible and easier-to-manage code in Swift. Finally, you will learn how to add the copy-on-write feature to your custom value types, along with understanding how to avoid memory management issues caused by strong reference cycles. By the end of this Swift book, you will have mastered the Swift 5.3 language and developed the skills you need to effectively use its features to build robust applications. What you will learn Understand core Swift components, such as operators, collections, control flows, and functions Identify how and when to use classes, structures, and enumerations Use protocol-oriented design with extensions to write easy-to-manage code Leverage design patterns with Swift to solve commonly occurring design problems Apply copy-on-write for your custom value types to improve performance Add concurrency to your applications using Grand Central Dispatch and operation queues Implement generics to write flexible and reusable code Who this book is forThis book is for beginners with a basic understanding of programming and experienced developers looking to learn Swift programming. Familiarity with Apple's tools will be beneficial but not mandatory. All examples should also work on the Linux and Windows platforms

Embrace the Protocol-Oriented Programming paradigm, for better code maintainability and increased performance, with Swift programming. Key Features Leverage the power of Protocol-Oriented Programming in your applications Leverage generics to create very flexible frameworks Learn how to implement common design patterns in a protocol-oriented way Book DescriptionProtocol-oriented programming is an incredibly powerful concept at the heart of Swift's design. Swift's standard library was developed using POP techniques, generics, and first-class value semantics; therefore, it is important for every Swift developer to understand these core concepts and take advantage of them. The fourth edition of this book is improved and updated to the latest version of the Swift programming language. This book will help you understand what protocol-oriented programming is all about and how it is different from other programming paradigms such as object-oriented programming. This book covers topics such as generics, Copy-On-Write, extensions, and of course protocols. It also demonstrates how to use protocol-oriented programming techniques via real-world use cases. By the end of this book, you will know how to use protocol-oriented programming techniques to build powerful and practical applications. What you will learn Learn the differences between object-oriented programming and protocol-oriented programming Understand why value types should be prioritized over reference types Delve into protocols, protocol inheritance, protocol composition, and protocol extensions Learn how to implement COW (Copy-On-Write) within your custom value types Understand how memory management works in Swift and how to avoid common pitfalls Design applications by starting with the protocol rather than the implementation Who this book is forThis book is intended for Swift developers who have, at minimum an introductory knowledge of the Swift programming language and would like to understand how they can use Protocol-Oriented Programming techniques in their applications.