Performant, sleek and elegant.
Some time ago I published a tiny Swift package IndexedDataStore which tackles a problem of storing data blobs on disk. It could the image data or anything else. When working with Swift packages then it is extremely easy to build and run tests on macOS but when we want to build and run tests on …
Continue reading "Running tests in Swift package with GitHub actions"
Package.swift file in Swift packages describes the package contents including other dependencies, build targets and so on. Double-clicking a Package.swift file opens Xcode with that package and one can build and run tests. When adding continues integration to a Swift package then we would like to build, test, and also create a code coverage report. …
Continue reading "Code coverage for Swift Packages with Fastlane"
ExpressibleByStringInterpolation is a protocol which makes it possible to compose strings with expressions evaluated at runtime. Interpolated strings are created with adding a \(some code) to a string. Those expressions are evaluated and a final string is created. This protocol, among other things, enables customizing strings what are created by those expressions. At the end …
WWDC'20 brought an addition to SwiftUI apps which enables to create document based applications in SwiftUI. Along with DocumentGroup API two new protocols were added: FileDocument and ReferenceFileDocument. The first one is meant for value types and the latter one for class type document types. For seeing how much effort it takes to create a …
Continue reading "Reading Fastfiles with document based SwiftUI app on macOS"
Swift Foundation contains a lot of useful functions on collection types. In the context of this blog post we are interested in map(_:) and prefix(while:). Map is used for transforming collection elements and prefix(while:) for getting a sequence containing initial elements until the predicate is true. In some cases the predicate used in the prefix(while:) …
Continue reading "Adding prefixMap for expensive operations in Swift"
Signal Path version 2.4 is out. This time it is a smaller release concentrating on optimizing file accesses when playing audio or just scrolling through the file.
In the previous blog post Reading data from a file with DispatchIO I built a small FileReader which enabled reading data from a file for random byte ranges. Signal Path uses a similar file reader but in addition it also caches read data in some interactions where there are a lot of read requests active, for …
Continue reading "Building a memory cache for a file reader in Swift"
Signal Path is an app which works with large files, even in several gigabytes. The app reads ranges from the file and visualizes the data. Signal Path heavily relies on DispatchIO for having efficient access to data in a file. The aim of the blog post is to build a FileReader class which wraps DispatchIO …
Signal Path just got a new feature which was requested by users. Happy to announce that Signal Path 2.3 includes a audio replay feature. Now users can record audio and then replay the recording. Especially useful for people who would like to see spectrums while replaying the recording with sound: for example singers or musical …
Continue reading "Signal Path 2.3 for macOS, iOS and iPadOS"
I was looking at formatters provided by Foundation framework and this time I would like to put some attention on MeasurementFormatter. Like the name says, it is used for creating localized strings of some sort of measurements. Measurements are represented by a generic struct Measurement where the generic UnitType describes the unit represented by it. …
Continue reading "Measurement, Unit, Dimension, and MeasurementFormatter on iOS"
