An online tool for learning, building, & testing regular expressions. RegExr lets you quickly create regular expressions with results updating in real-time as you type. You can roll over any match or expression for details such as range, groups and reference. Expressions can be saved & shared with others or you can search for and rate community patterns. RegExr also includes a complete regular expression reference library, cheatsheet, and several examples to help you get your patterns right.
To celebrate one of the most exciting WWDC events in recent memory, raywenderlich.com is excited to announce three brand new iOS books: SwiftUI by Tutorials, Combine: Asynchronous Programming with Swift, and Catalyst by Tutorials.
Learn how to build fluid and engaging declarative UI for your apps — using less code — with SwiftUI, how to master native asynchronous programming with Swift using the Combine framework and how to run iOS apps natively on macOS with Catalyst!
Our three new advanced iOS books are currently on sale and, when you get all three, you can save over 40% with our iOS Summer Bundle! It’s only available for a limited time, so be sure to take advantage of it before it’s gone.