As we’ve seen in my article on Swift’s guard Statement and this article on error handling, Swift’s guard and throw statements encourage a style of programming where we return early from a given scope in case of error. In the case of the guard statement, this is due to a failing precondition and in the case of the throw statement, this is because we encountered some sort of … [Read more...]
Error Handling in Swift
Regardless of your skill, handling errors is a common task for any developer. As developers we have complete control of the code we write and features we include, but despite our best efforts, we don’t control everything. We don’t control the values our users enter or whether our applications have access to the resources they need. In this post we’re going to look at how we can … [Read more...]
Swift Type Aliases
Just a quick post today looking at type aliases in Swift. Type aliases, as the name suggests, are a way of providing an alternative name or alias for an existing Swift type. As such, type aliases provide a convenient way for referring to existing types using a name that is more appropriate to the particular context we’re working with and in doing so can make our API’s more … [Read more...]
Using Custom Types as Enumeration Case Raw Values in Swift
As mentioned in my previous post, the raw values used with enumerations in Swift are limited to either String, Character, Int, Float or Double values. In certain cases though we might want to use our own custom types. In this post I thought I'd investigate whether it was possible to use custom types of our own as raw values. Let’s start off with an example. Say we had a … [Read more...]
Swift Enumerations
In this article we’re going to continue our journey through the Swift programming language by looking at another of it’s features - enumerations. Enumerations, or ‘enums’ for short, are a common feature in many programming languages providing a convenient way of grouping a set of related values together into a single code construct. As we’ll see though, enumerations in Swift … [Read more...]