Latest developer tech news from the world.

Trigger a GitHub Actions workflow when a folder changes

Join me as I look at how you can trigger when a GitHub Actions workflow runs.

Using NGINX’s X-Accel with Remote URLs

Ewen explains how to tackle serving up remote files from an S3 bucket to permitted users via a Django app using NGINX.

Tether elements to each other with CSS anchor positioning

A new API is coming to the web platform to help you position elements in an adaptive way with no tricks.

Faster StoreKit testing by syncing in-app purchase products

StoreKit testing in the Simulator allows you to speed up testing in-app purchases for your app. You can test in-app purchases in Xcode by generating a StoreKit configuration file containing the available products for your app. You’ll be able to purchase products without connecting to App Store servers, without an internet connection, and you’ll be … →

The definitive guide to docker's default-address-pools option

What the default pools are, why you can't make more than 31 bridge networks, & how to fix that.

Core Data Aggregate Functions

Learn from a Google Developer Expert: Core Data is a beautifully designed object mapping and persistence framework -- big kudos to the Apple engineers.

What Is a Core Data Fault

This tutorial zooms in on an important topic for anyone working with Core Data, faulting. Faulting is a concept that often confuses developer new to Core Data. Before I explain what faulting is, I want to show it to you.

What Are Core Data Query Generations

Earlier this month, I wrote about Core Data faults. Faulting is a key concept of the Core Data framework. It is because of faulting that Core Data is as performant as it is and it ensures Core Data's memory footprint remains at an acceptable level.

Code generation using Swift Package Plugins

How to build a Swift Package Plugin to automatically generate unit tests from input Swift files.

When to Use Combine's Filter and CompactMap Operators

Combine's filter and compactMap operators share a few similarities and it is possible to use them interchangeably in some scenarios. That said, there are a number of key differences we discuss in today's episode of Combine Essentials.

iCloud Key-Value Store with NSUbiquitousKeyValueStore

Ubi–what!? The NSUbiquitousKeyValueStore syncs key-value store data across iOS and Mac devices via iCloud. Let's find out how you can use it with Swift!