All Posts

• Mar 12th, 2019

  Swift Quiz

  Exploring tricky Swift questions, one tweet at a time.

• Mar 5th, 2019

  Swift Tip: Generics vs. Any

  What a generic type can tell you about the implementation

• Feb 26th, 2019

  Swift Tip: From Optionals to Errors

  A convenience method for Optionals

• Feb 19th, 2019

  Updating Advanced Swift

  A fourth edition, updated for Swift 5.0

• Feb 12th, 2019

  Open-Sourcing The Swift Talk Backend

  Now written in Swift. 💫

• Feb 5th, 2019

  Swift Tip: An NSScanner Alternative

  Scanning without a Scanner

• Jan 31st, 2019

  Swift Talk for Teams

  Share Swift Talk with your team with our improved team subscriptions.

• Jan 29th, 2019

  Swift Tip: Non-Empty Collections

  Even simpler non-empty optionals

• Jan 22nd, 2019

  Swift Tip: Non-Empty Optionals

  A minor cosmetic extension

• Jan 15th, 2019

  Swift Tip: Atomic Variables — Part 2

  Synchronized access to values, a simple solution

• Jan 9th, 2019

  Looking Back, Looking Forward

  Our year in review

• Dec 18th, 2018

  Swift Tip: Atomic Variables

  Providing synchronized access to values

• Dec 13th, 2018

  Swift Tip: Stable APIs on the Server

  Pinning an API's structure without changing internal structs

• Dec 11th, 2018

  Give Swift Talk as a Gift 🎁

  A perfect present for the developer in your life

• Dec 4th, 2018

  Swift Tip: Unexpected Results from a Date Formatter

  String to date conversions can return nil!

• Nov 29th, 2018

  Swift Tip: Vector Algebra with Protocols

  Defining vector operations on a protocol.

• Nov 26th, 2018

  Happy Cyber Monday! 👨🏻‍💻👨🏻‍💻

  30% off Swift Talk, for one day only

• Nov 23rd, 2018

  Happy Black Friday! 🛍

  30% off all eBooks until Monday

• Nov 20th, 2018

  Swift Tip: Local Struct Definitions

  Using structs within a function body

• Nov 13th, 2018

  Swift Tip: Custom Views Without Subclassing

  Using plain functions to compose views

• Nov 6th, 2018

  Swift Tip: Lightweight Observation

  Using didSet to observe struct properties

• Oct 30th, 2018

  Swift Tip: Auto Layout with Key Paths

  Using Swift's Key Paths to create simple Auto Layout helpers

• Oct 23rd, 2018

  Swift Tip: Custom Types for Codable Conformance

  Should you conform to framework types or create your own?

• Oct 18th, 2018

  Swift Tip: An Example Refactoring

  We look at a typical refactoring from our backend rewrite

• Oct 11th, 2018

  Swift Tip: Refactoring to Associated Values

  Using Built-in Swift Features to Simplify Your Code

• Oct 2nd, 2018

  Swift Tip: Using AppKit from the Command-line

  Enhance Swift command-line scripts with GUI elements

• Sep 18th, 2018

  Swift Tip: Mixing and Matching Imperative and Functional Code

  Expressing the same logic in imperative and functional ways

• Sep 11th, 2018

  Building a Form Library

  Design goals, features and implementation

• Sep 4th, 2018

  Swift Tip: Switching with Associated Values

  Some tips for writing concise switch statements

• Aug 28th, 2018

  Swift Tip: Testing Swift on Linux

  Using Docker for quick tests on Linux

• Jul 10th, 2018

  Swift Tip: Improving Readability

  The importance of micro-refactorings

• Jul 3rd, 2018

  Swift Tip: Notifications

  An easier way to work with associated values in notifications

• Jun 26th, 2018

  Swift Tip: Refactoring with Deprecations

  Keep your code compiling during large refactorings

• Jun 19th, 2018

  Swift Tip: Separating UI and Model Code

  Keeping view controllers clean and understandable

• Jun 14th, 2018

  Swift Tip: Quick Performance Timing

  Timing code without Instruments

• Jun 5th, 2018

  Swift Tip: Extracting Pure Functions

  Moving Pure Code Out Of A View Controller

• May 29th, 2018

  Swift Tip: Type-Safe Initialization Using Storyboards (Part 2)

  Instantiate view controllers in a robust, type-safe way

• May 22nd, 2018

  Swift Tip: Type-Safe Initialization using Storyboards (Part 1)

  Configure view controllers in a robust, type-safe way

• May 15th, 2018

  App Architecture: Our New Book is Out!

  Launching the complete edition of our new book

• May 8th, 2018

  Swift Tip: First Class Functions

  Using Functions Everywhere

• May 1st, 2018

  Swift Tip: Extracting Parameters

  Group Parameters into Separate Types

• Apr 24th, 2018

  Swift Tip: Bindings with KVO and Key Paths

  Create lightweight bindings without a reactive framework

• Apr 17th, 2018

  Swift Tip: In-Place Map

  Removing duplication in assignments

• Apr 10th, 2018

  Swift Tip: Local Computed Variables

  Removing duplicate expressions in functions

• Apr 3rd, 2018

  Swift Tip: Capture Lists

  Avoid reference cycles, capture the right references

• Mar 27th, 2018

  Swift Tip: Unwrapping Optionals

  A case for careful force unwrapping

• Mar 20th, 2018

  Swift Tip: Lazy Infinite Sequences

  Writing functional code can be natural

• Mar 13th, 2018

  Swift Tip: Enum Initializers

  Working With A Mutable Self

• Mar 6th, 2018

  Swift Tip: Without Actually Escaping

  How to Clean Up An API

• Feb 27th, 2018

  Swift Tip: Extensible Libraries with Protocols

  We use protocol composition to build an extensible Markdown library

• Feb 20th, 2018

  Swift Tip: Enums vs Classes

  The Expression Problem

• Feb 13th, 2018

  Swift Tip: String to Data and Back

  When to force-unwrap, when to check for nil

• Feb 6th, 2018

  Swift Tip: Networking with Codable

  Leveraging the Codable Protocol for JSON Parsing

• Jan 30th, 2018

  Swift Tip: OpaquePointer vs. UnsafePointer

  Dealing With Pointers Imported From C

• Jan 23rd, 2018

  Swift Tip: Codable Enums

  How to Make Any Enum Conform to Codable

• Jan 19th, 2018

  Our New Book: App Architecture (Early Access)

  New ways to think about iOS app architecture

• Jan 16th, 2018

  Swift Tip: Adding a toggle Extension on Bool

  Toggle a boolean in deeply nested structs

• Jan 9th, 2018

  Swift Tip: A Functional Interface for Imperative Code

  Implementing a justified flow layout algorithm

• Jan 2nd, 2018

  Looking Back, Looking Forward

  Our year in review

• Dec 28th, 2017

  Swift Tip: Weak Arrays

  Using Swift arrays to only hold weak references

• Dec 19th, 2017

  Swift Tip: Decomposing Emoji

  Why Swift, Objective-C, Ruby, and Python report different lengths for the same string

• Dec 12th, 2017

  Swift Tip: A Quick Tip For String Performance

  This one weird trick to make string parsing 18% faster

• Dec 5th, 2017

  Introducing Swift Talk Collections

  We're introducing Collections, a newly designed way to help you find the things you're looking for.

• Nov 23rd, 2017

  Swift 4 Book Updates + Discount!

  All our books have been updated for Swift 4, and they're off 25% this week.

• Jun 5th, 2017

  WWDC 2017 Sale

  25% off on all our eBooks during WWDC 2017!

• Jun 2nd, 2017

  Announcing: Optimizing Collections

  Our new book about writing very efficient custom collections in Swift

• Feb 21st, 2017

  Core Data Update

  We've updated our Core Data book for Swift 3 and iOS 10/macOS 10.12

• Feb 6th, 2017

  New Workshops + Early Bird Tickets

  New workshops, dates and discounts

• Oct 6th, 2016

  Advanced Swift Update

  We've updated our book for Swift 3

• Sep 23rd, 2016

  Advanced Swift Workshop in Berlin

  We're organizing a Swift workshop in Berlin. Here are the details.

• Aug 22nd, 2016

  Announcements

  Chinese Translations and Advanced Swift update

• Jun 17th, 2016

  Introducing Swift Talk

  Follow us building Swift projects in our weekly Swift Talk videos.

• Jun 13th, 2016

  Happy WWDC 2016!

  All our eBooks are 30% off during WWDC.

• May 30th, 2016

  Functional Swift in Japanese

  Our book Functional Swift has been translated to Japanese

• Apr 7th, 2016

  Functional Swift in Chinese

  Our book Functional Swift has been translated to Chinese

• Mar 22nd, 2016

  Advanced Swift, Book Bundles, and Team Licenses

  Our Advanced Swift book is out! Also, we now have bundle options and team licenses for all of our books.

• Dec 14th, 2015

  The Core Data Book Is Out!

  Available immediately as eBook and paperback.

• Oct 22nd, 2015

  In-House Workshops

  In the first half of 2016 we're available for a limited number of in-house training workshops.

• Oct 14th, 2015

  Updates on Our Books

  The update of Functional Programming in Swift for Swift 2 is in beta. Advanced Swift and Core Data are on the finishing straights.

• Jul 28th, 2015

  Core Data Early Access

  Our new Core Data book is now available in early access version. Read along and comment as it evolves!

• Jul 14th, 2015

  Advanced Swift Early Access

  We're opening the early access program for the Advanced Swift book. Read along and comment as it evolves!

• Jun 5th, 2015

  The new objc.io

  Everything is changing — new focus, new books, and a new website. Welcome back.