clojurescript

I'd like to implement a Foxx service using ClojureScript. I've read that one can use Typescript and Coffeescript by running the transpiler during each development step; Can I do similar for ClojureScript ? As far as we know, it is not possible to write ClojureScript applications in such a way that they could run in ArangoDB/Foxx. Unlike TypeScript and CoffeeScript, ClojureScript is not just a language but an application runtime. It's better to think of it not as an alternative syntax for JavaScript but as a way to write applications that happen to be executed on a JavaScript engine. In other

This may actually be a bit of an XY-problem , so I'll try to explain what the goal is first. I'm building a ClojureScript application which is composed of a set of Reagent components. It provides a user interface where you can dynamically add or remove UI elements. These UI elements (components) have a certain type. For example a Markdown component is-a Text component. Whenever the user is presented with the option to add Text we list all the components that match the type+ descendants (in this case Markdown, there could be others). The way I've coded it up is as follows. Each component is in

Using cljsbuild, I can compile all my .cljs files to one file. However, I wish to be able to pick a directory for output and have each .cljs file compile into its own .js file. How can this be specified? You can use 'multiple build configurations': cljsbuild accepts a vector of configurations for :builds key, each element of which defines rules for compiling separate .js file (more info could be found in lein-cljsbuild README ). Simple example: :cljsbuild {:builds [;; Config for first .js file {:source-paths ["dir-with-cljs-for-first-js"] :compiler {:output-to "dir-for-js/first.js"} ;; Config

I'm trying to add some functionality to an existing JavaScript system. To be then used from JavaScript again (as opposed to within the ClojureScript namespace). Perhaps this isn't possible? Here's a simplification of what I want to do: // JavaScript String.prototype.foo = function() { return "bar"; } # CoffeeScript String::foo = -> "bar" I want to be able to run my script above, and then call it from elsewhere in the code. I've tried messing with extend-type and defprotocol , along with export , but nothing seemed to expose my foo function. It's possible that this was a design decision and

In Clojure to address concurrency issues we can use an atom to write: user=> (def my-atom (atom 0)) #'user/my-atom user=> @my-atom 0 user=> (swap! my-atom inc) 1 user=> @my-atom 1 user=> (swap! my-atom (fn [n] (* (+ n n) 2))) 4 We know that this (in the Clojure implementation) is a wrapper around the Java Atomic object . Interestingly enough, Atoms are replicated in ClojureScript , at a Syntactic level - even though JavaScript runtimes don't have an Atomic reference. My question is, How are Atoms implemented in Clojurescript? Are they just an object Wrapper? llj098 It just returns and assigns

I have a ClojureScript program that mainly performs math calculations on collections. It was developed in idiomatic, host-independent Clojure, so it's easy to benchmark it. To my surprise (and contrary to what the answers would suggest to Which is faster, Clojure or ClojureScript (and why)? ), the same code in ClojureScript runs 5-10 times slower than its Clojure equivalent. Here is what I did. I opened a lein repl and a browser repl at http://clojurescript.net/ . Then I tried these snippets in both REPLs. (time (dotimes [x 1000000] (+ 2 8))) (let [coll (list 1 2 3)] (time (dotimes [x 1000000]