دانلود کتاب Functional Swift

This book will teach you how to use Swift to apply functional
programming techniques to your iOS or OS X projects. These techniques
complement object-oriented programming that most Objective-C developers
will already be familiar with, providing you with a valuable new tool in
your developer’s toolbox. We will start by taking a look at Swift’s new
language features, such as higher-order functions, generics, optionals,
enumerations, and pattern matching. Mastering these new features will
enable you to write functional code effectively. After that, we will
provide several examples of how to use functional programming patterns
to solve real-world problems. These examples include a compositional and
type-safe API around Core Image, a library for diagrams built on Core
Graphics, and a small spreadsheet application built from scratch.