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When to Use Combine's TryMap Instead of Map

Combine Essentials

In an earlier installment of Combine Essentials, you learned about Combine's map operator, one of the most commonly used operators. The map operator has one important limitation. The closure you pass to the map operator can't be throwing. Don't worry, though. Combine's tryMap operator addresses this shortcoming.

in Combine

Merging Publishers With Combine's Merge Operator

Combine Essentials

This episode of Combine Essentials zooms in on Combine's merge operator. As the name suggests, the merge operator merges two or more upstream publishers into a single publisher. Even though the merge operator isn't difficult to use, there are a few pitfalls to watch out for.

in Combine

When to Use Combine's Filter and CompactMap Operators

Combine Essentials

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.

in Combine

How to Use Combine's Map and CompactMap Operators

Combine Essentials

In this episode of Combine Essentials, we take a look at two of Combine's most commonly used operators, map and compactMap.

in Combine

How to Implement Basic Authentication in Swift

Networking Essentials

In this episode, you learn how to authenticate a user using basic authentication, or basic auth for short, in Swift. We use the URLSession API in this episode, but the concepts we discuss apply to any networking library or framework that can send requests over HTTP(S).

in Networking

Formatting a Time Interval in Swift

Formatting a time interval in Swift is trivial thanks to Foundation's DateComponentsFormatter class. While it can do more than formatting time intervals this episode shows you how to use the DateComponentsFormatter class to convert a TimeInterval object to a String object.

in Foundation

Fetching Data from a Persistent Store

Adding Core Data to an Existing Swift Project

In the previous episode of Adding Core Data to an Existing Swift Project, we saved data to the persistent store, a SQLite database. In this episode, we fetch the books stored in the persistent store and update the label of the books view controller.

in Core Data

Saving Data to a Persistent Store

Adding Core Data to an Existing Swift Project

In the previous episode of Adding Core Data to an Existing Swift Project, we added a data model to the project and set up the Core Data stack, using the NSPersistentContainer class. In this episode, you learn how to save data to a persistent store.

in Core Data

Setting Up the Core Data Stack

Adding Core Data to an Existing Swift Project

Core Data is Apple's widely used persistence framework. It has been around for more than a decade and has earned its stripes. Getting stared with Core Data isn't as difficult as many developers make you believe as long as you take the time to learn the basics. In this episode, I show you how to add Core Data to an existing Swift project.

in Core Data

Ship, Ship, Ship

Steve Jobs famously said "Real artists ship." He meant that putting your work out in the world is an essential aspect of every creative, and that includes developers. Creatives that only work in isolation and never ship anything may not be that real after all.

in Opinion

Protect Your Productivity

How productive you are as a developer isn't only the result of your habits, your talents, and your experience. Your environment plays a key role, especially if you work in a team, a company, or a shared workspace.

in Opinion

Open Source

The concept of open source has been around for decades, but platforms like GitHub have accelerated the growth of open source initiatives. Most of us can't imagine a world without open source software.

in Opinion