Posts tagged “swift”

Swift Blog Carnival Roundup: Tiny Languages

Recap of the very first Swift Blog Carnival on the topic of Tiny Languages: six posts on task runners, DSLs, parsers, symbolic math, and grammar tools.

Swift Blog Carnival: Tiny Languages

The Swift Blog Carnival topic for April is open; it is about Tiny Languages. Read what a blog carnival is, why you should care, and how to participate!

Zettelkasten for Programmers: Documenting Confusing with Swift.SendableMetatype

I got terribly confused reading the API docs on th SendableMetatype protocol. Because I do not yet know the solution, I want to share how I store this in my Zettelkasten for future problem-solving and discussions.

Use clang API notes to Annotate C Header Files for Swifty Module Imports

Doug Gregor shows how to use clang to import a C library with header files that you don’t own in a way that produces very ergonomic Swift APIs with annotations in YAML files.

Clickable Swift Testing Failure Messages in Emacs compile-mode

The swift test command-line invokation does not print unambiguous filenames for test failures, so we need to attempt to patch this from the console output ourselves like true hackers.

Getting Over Frustratingly New Topics (Swift Concurrency) with a Zettelkasten

I am learning to speak a new language: Swift Concurrency. It is densely packed with familiar-sounding concepts and details I am not aware of (yet). This is how I tackle it.

Variadic Types in Swift and How to Count Them

Exploring parameter packs (the repeat-each stuff) in Swift to count how many types are in the generic argument clause, or if that’s empty.

Calling Swift Library Functions from C

A quick recipe on how to emit a binary from Swift that you can use from a C program.

The Limits of swift-markdown Customization

So I’ve tried to create a processing pipeline with the Markdown package published by the Swift Team. It does a couple of really nice things, but it is also very locked-down in its functionality.

Working with Process Pipe and Its 64KiB Limit

Piping data from your Swift program to another program, or receiving large amounts of data from standard input, can be prone to errors, freezing your program. Here is how to do it safely.

Alex Ozun: Type-Driven Design with Swift (SwiftCraft 2024)

The talk “Type-Driven Design with Swift” by Alex Ozun covers interesting topics and presents type-based solutions to software development problems in an easy-to-grasp way.

Typed Filters and callAsFunction

Combining three Swift features for the sake of expressivitiy: sum types aka enums, callAsFunction to introduce “callable” semantics, and type extensions to beautify call sites.

Negate KeyPath<T, Bool> Values with not()

Here is a simple free function to invert boolean values for all you Swift KeyPath fans out there.

UserDefaults.register(defaults:) Is a Bit Like Nil-Coalescing

Mental model: registering fallback values for UserDefaults is like Optional coalescing in Swift.

The Missing Array.appending(contentsOf:)

There is no immutable append variant to concatenate two Arrays, or Strings, or other collections in the Swift standard library. Here is one.

Swift Pattern Matching with Extra Conditions, and the Value of Syntax Summaries

Natalia Panferova of nilcoalescing.com posted “Swift enum pattern matching with extra conditions”: I believe there’s value in reviewing summaries like these for advanced Swift programmers!

The Difference between Entity and Value Object, and How They Relate to Swift's Identifiable and Equatable Protocols

Mutating Struct and State Observers: How the Latter Will Be Notified Even for 'No-Ops'

Weak Self -- Closure Rules of Thumb

Swift Pattern Matching Operator: Compiler Error when Specifying Enum Type and Case Name?

The Beauty of Hacking Swift: Make Union of Set Algebra Types More Obvious

XCTestExpectation via NSPredicate Is On a Slow Interval, Use This Instead

Demonstrate Swift's Lazy Initialization of Static Attributes Even when Using a Property Wrapper

Swift API Docs for String.index(_:offsetBy:limitedBy:) Is Still Misleading

Win32 API Programming With Swift

Find Swift Classes from Objective-C Tests

How to Fix fileReferenceURL() to Work with NSURL in Swift 3 and Swift 4

Exposing the MultiMarkdown 6 Library to Swift, Part 1: Swifty Enums

Dependency Injection via the Recent "Cake Pattern in Swift" Pattern is Useless in Practice

How to Use NSGlyph in Swift

Adding last(where:) in Swift

Non-Obvious Swift: Defer

Express Either–Or-Relationships as Enums

Core Data is Invasive. You Can Hide It, Or You Can Embrace It

Better Swift FileManager File Existence Checks

Shopify's Ruby on Rails app statistics

Resolving NSTreeController's "Ambiguous use of 'children'" in Swift 3

Breaking NSLocale API Changes Revisited

Swift 2.3 NSLocale UIKit API Changes Break iOS 8 Compatibility

Assertions in Swift Kill Your Code

Implementing CollectionType in Swift 2.x

I love Swift's Expressiveness

objc.io Books 30% Off

Configuration Objects and the Then Microframework

Principles of Object-Oriented Design in Swift 2.2

Custom Enumerated Sequences in Just 1 Line of Code

Swift Depends on Objective-C

How to Get Started with Swift: Write New Tests in Swift

Replacing Loops with Mapped Ranges

The Power of Guard

Currying and Treating Instance Methods as Curried Functions

The Swift Developer's Cookbook Review

Swift Selector Syntax Sugar

Creating a Cheap Protocol-Oriented Copy of SequenceType (with a Twist!)

Import Parts of a Module

rethrows in Swift

Inline Blocks as Result-Producing Helpers

Use and Misuse of Helper Functions

I'll be writing a Word Counter Swift module fully East-Oriented

Swift OS X Programming for Absolute Beginners Review

Optional Protocol Methods in Swift using Closures and No Protocol, Actually

Achieve More with a Variety of Value Objects in Swift

Put Usage of a CoreDataFetchRequest out of Your Code and Into ... Where Exactly?

Swift Protocol Extensions as Mixins – And How Do You Test That?

Testing Shorthand: Use a Subclass of the Real Object Under Test

Using Guard in Unit Tests

Save Yourself Casting Headaches with a Generic Fetch Request Object

Weird EXC_BAD_ACCESS in Swift 1.2 Was Due to A Compiler Bug

Refactoring Legacy Code: Replace Free Function in Tests, Even Swift's Own Functions

Library for Providing Static UITableView Contents in Swift

Using Blocks to Realize the Strategy Pattern

Protocol Madness: Comparing Apples to Oranges from the Vantage Point of Fruit

How to Write Unit Tests for Storyboard-based Buttons in Swift

Using Swift Enums to deal with Storyboard Segues

Be Cautious with Try-Catch for error handling in Swift 2.0

Test doubles for Core Data managed objects might not work as expected

State of Mocking in Swift Tests

This is probably the nicest Swift Result enum ever

Observing Enums in Swift 1.2 with KVO

Swift Extensions and Information Hiding

Return Types can Capture Async Processes and Failures

Functional Programming in Swift (YouTube Videos)

Going Beyond Guard Clauses in Swift

Plug-in a UITextView Placeholder Label Extension

Functional Error Handling in Swift Without Exceptions

Thinking in Terms of Functional Programming Encourages Clean Factoring of Code