Ping us on Twitter, leave your comments here, open an issue in our tracker, or drop us a message in the Gophers Slack #goland channel. That’s it for today! We would love to hear what you think about the new features. You can also generate a request in the HTTP client by pressing ⌥ ↩ ( Alt + Enter) and choosing the corresponding option from the context menu. JSON and YAML files now feature automatically inserted web references inside values that start with and You can open these links in a web browser by holding ⌘ ( Ctrl) and clicking on a link. Hopefully, this will be helpful, especially to those new to the language. Now it contains additional information about how to use iota. We’ve updated quick documentation for iota. We’ve also updated the quick documentation – now the tooltip that appears when you hover over a type lists methods on value and pointer receivers separately. As usual, you can place the cursor on the highlighted code and press ⌥ ↩ ( Alt + Enter) to change the inspection’s severity or other details. There is a new inspection in GoLand that will warn you if your type has methods on both value and pointer receivers. The Go documentation recommends that all methods on a given type should have either value or pointer receivers (for details see “ Should I define methods on values or pointers?” and “ Why do T and *T have different method sets?‘). Report methods on both value and pointer receivers Overall, we’ve fixed 290+ generics-related issues to date. For instance, GoLand doesn’t complain about using a generic callback function with several parameters anymore – this false-positive error has been fixed. This build also includes some fixes that hopefully will make working with type parameters more enjoyable. GoLand automatically inserts a type parameter’s identifier when you type a receiver while creating a method (it could be any letter, but is usually the same as in the type’s declaration). Completion for a type parameter when typing a method’s receiver This limitation was introduced by the Go team and you can read more about it here. The IDE now reports an error if you attempt to use interfaces with methods in unions. You can use the quick-fix from the popup window that appears when you hover over a type parameter or press ⌥ ↩ ( Alt + Enter) to see all available quick-fixes. There is also a quick-fix to delete such type parameters. Type parameters with an empty parameter list are now reported as errors. Quick-fix to delete a type parameter with an empty parameter list They are grayed out, and you will see a warning when hovering over them. There is a new inspection that reports unused type parameters. To be clear, I’ll provide general guidelines, not hard and fast rules. This article is about when to use generics in Go code, and when not to use them. In this article I’m not going to describe what generics are nor how to use them. You can get the EAP build via the Toolbox App, download it from our website, use a snap package (for Ubuntu), or from inside GoLand select Check IDE updates for Early Access Program in Preferences / Settings | Appearance & Behavior | System Settings | Updates. The Go 1.18 release adds a major new language feature: support for generic programming. Iterates over a collection and returns an array of all the elements the predicate function returns true for.Ĭhildren := lo.The second build of our 2022.2 Early Access Program is here. I wanted a short name, similar to "Lodash" and no Go package currently uses this name. samber/mo: Monads based on Go 1.18+ Generics (Option, Result, Either.).samber/do: A dependency injection toolkit based on Go 1.18+ Generics.I feel this library is legitimate and offers many more valuable abstractions. In the future, 5 to 10 helpers will overlap with those coming into the Go standard library (under package names slices and maps). Benchmarks also show similar performance gains compared to pure for loops. I used to code with the fantastic "go-funk" package, but "go-funk" uses reflection and therefore is not typesafe.Īs expected, benchmarks demonstrate that generics are much faster than implementations based on the "reflect" package. This project started as an experiment with the new generics implementation. ✨ samber/lo is a Lodash-style Go library based on Go 1.18+ Generics. Lo - Iterate over slices, maps, channels.
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