In this podcast, the hosts discuss the changes in Go 1.22, including improvements in looping, the range fog experiment, and the use of the embed package in Go. They also talk about the drawbacks of using nullable strings in databases and express frustration with the lack of basic devices and unnecessary features in technology.
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Quick takeaways
Go 1.22 fixes a bug with loop variables, ensuring they work as expected.
Go 1.22 introduces the ability to range over functions, simplifying the creation of iterators.
The Go server router in Go 1.22 provides basic utilities and fixes issues, eliminating the need for third-party routers.
Deep dives
New Go release cycle and predictable releases
The Go language follows a predictable release cycle, with a new version released every six months. This regular schedule allows users to anticipate updates and plan accordingly. The releases include new features and improvements to the language, ensuring that users have access to the latest advancements.
Changes to for loops in Go 1.22
Go 1.22 introduces a change to for loops, fixing a common bug with loop variables. Previously, if a loop variable was not properly handled, it could result in unexpected behavior, where the value of the variable was reused and only the last value was seen. This change ensures that loop variables work as expected, eliminating the need for additional code to handle this issue.
Range over functions as iterators in Go 1.22
In Go 1.22, a new feature allows range over functions, enabling the creation of iterators. With this change, developers can easily write iterators for various data structures and use them in range loops. This feature leverages the function type in Go, providing a convenient way to iterate over different types of data, which was previously challenging.
Improvements in the Go Server Router
The Go team has recognized the popularity of third-party routers like Gorilla Mux and has made improvements to the Go server router to provide basic utilities that developers need. The updated router allows for easier route registration based on methods and can also capture different parts of the address. Additionally, it fixes an issue where registering a route on the homepage would become the default route for sub-pages, causing confusion. This improvement is expected to be beneficial for education purposes, as it simplifies the process for developers without the need to rely on third-party routers.
Contributions to Go 1.22
The contributor, Carlana, worked on three features for Go 1.22. The first is the addition of reflect.Type4, a utility that simplifies building a reflect type using generics. Reflect.Type4 resolves issues where the interface type could be lost when passing an error type. The second contribution is slices.Concat, which provides an easy way to combine multiple slices. This addition is significant for developers who often needed to concatenate slices and addresses certain pitfalls related to concurrent modifications. Finally, the CMP.Or function was added, which allows programmers to return the first non-zero value, similar to a proposed question mark operator. These contributions have improved the standard library and provide convenient solutions for common use cases.
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