Copied to clipboard. The code you are editing can be run interactively, right in the same spot as you are doing the editing, with a full text editor at your disposal, with the same definitions all in scope, without needing to switch to a separate tool. That is why I was surprised by the refactoring capacity of this new programming language called Unison. Introduction to the Unison programming language Unison is a new purely functional programming language, currently under development. The source for this document is on GitHub. (We don't have a redo yet, though). There's one more ingredient that makes this work effectively, and that's functional programming. ☝️ Using alias.term instead of move.term introduces a new name for a definition without removing the old name(s). Question: do we really want to reevaluate all watch expressions on every file save? But let's be honest that it's a compromise, and not forget to improve things later. Unison syntax highlighting for VS Code. We can discover the stars in the sky and pick different names for these stars, but the stars exist independently of what we choose to call them. If a result for a hash is in the cache, Unison returns that instead of evaluating the expression again. Unison will have a uniform feel in accordance with the community's overall opinions. Unison is a typed language largely influenced by Haskell, Erlang and a research language called Frank. No more running the same tests over and over again! There is a lot of complexity in how currently Internet services are being build, which can disappear via a decentralised Unison language runtime. 52.7k members in the ProgrammingLanguages community. It's not arbitrary or strange, but a logical and sensible choice with tremendous practical benefits. *, ++, or foo. Let's introduce some Unison syntax: Try doing view base.List.foldl if you're curious to see how it's defined. We'll do that shortly, but first, let's try calling our function right in the scratch.u file, just by starting a line with >: That 6 | is the line number from the file. We will introduce bits and pieces of the core Unison language and its syntax as we go. For example, x -> x + 1 (a definition) as opposed to Nat.increment (a name we associate with it for the purposes of writing and reading other code that references it). Try typing view square or view square.tests.prop1. A friendly programming language from the future. A friendly programming language from the future.. Unisonweb.org : visit the most interesting Unison Web pages, well-liked by users from Ukraine, or check the rest of unisonweb.org data below. When an expression has no side effects, its result is deterministic and you can cache it as long as you have a good key to use for the cache, like the Unison content-based hash. Haskell, Erlang, and Frank walk into a bar – and begin new project to work in Unison . While you can use functional programming paradigms in the language, you can just as easily use an object-oriented approach. Before getting going writing Unison code, you can configure UCM to set author and license information. V Programming Language vs Unison: What are the differences? Is it really feasible, though, to build a programming language around this idea? More Info. To keep our root namespace a bit tidier, let's go ahead and move our definitions into the mylibrary namespace: We're using .square to refer to the square definition directly under the root, and then moving it to the relative name square. When we added square, we were at the root, so square and its tests are directly under the root. But the longer you spend with the odd idea of content-addressed code, the more it starts to take hold of you. Unison Runtime. It's a generator of natural numbers. !nat generates one of these numbers. We will often do use .base at the top of our file to refer to all the basic functions and types in .base without a fully qualified name. This is the Unison Codebase Manager starting up and initializing a fresh codebase. Developers describe V Programming Language as "A compiled language for developing maintainable software". It's similar to Go and is also influenced by Oberon, Rust, Swift. The dependency tracking for determining whether a test needs rerunning is 100% accurate and is tracked at the level of individual definitions. Deployment can be done in a similar way to Nix too. This is the basis for some serious improvements to the programmer experience: it eliminates builds and most dependency conflicts, allows for easy dynamic deployment of code, typed durable storage, and lots more. Haskell, Elm, and Clojure are probably your best bets out of the 27 options considered. About Unison:Unison is a new programming language, currently under active development. All the tests had been run previously and cached according to their Unison hash. We're used to thinking about our codebase as a bag of text files that's mutated as we make changes to our code, but in Unison the codebase is represented as a collection of serialized syntax trees, identified by a hash of their content and stored in a collection of files inside of that .unison/v1 directory.