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Add ClojureScript (WIP) #2

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44 changes: 44 additions & 0 deletions clojurescript.md
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# ClojureScript

Official website: https://github.com/clojure/clojurescript

## The answers

1. What does the type system look like? **Dynamic**

Derived from Clojure but with a few differences. Supports immutable, persistent
collections.
[[1]](https://github.com/clojure/clojurescript/wiki/Differences-from-Clojure#data-structures)

2. Is there a stable version? **Sort of**

1.8.40 is described as a "stable release" but it's nothing more than the latest
cut from master. The numbering aligns with the Clojure version.

3. Is it under active development? **Yes**

The latest version was released in March 2016. The number of commits has
dropped in recent months.
[[2]](https://github.com/clojure/clojurescript/releases)
[[3]](https://github.com/clojure/clojurescript/graphs/contributors)

4. What is its [bus factor](https://en.wikipedia.org/wiki/Bus_factor)? **Small**

Development relies pretty heavily on the work of
[David Nolen](https://github.com/swannodette) but it was originally created
by Rich Hickey and is supported by the Clojure/core team.
[[4]](https://github.com/clojure/clojurescript/graphs/contributors)
[[5]](http://clojure.com/blog/2011/07/22/introducing-clojurescript.html)

5. Does it support Dead Code Elimination? **Yes**

Through Google's Closure library.
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I'd make it clear that Dead Code Elimination is done through the Closure Closure compiler, and on top of that ClojureScript tries to leverage it as much as possible by using the Closure library for DOM operations, XHR and whatnot.

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macro can do a great work in detect Dead Code Elimination. This is an example that actually work in clojure but don't in clojurescript.
http://blog.venanti.us/yagni/

This issue explain the problems with clojurescript
venantius/yagni#26

[[6]](http://swannodette.github.io/2015/01/06/the-false-promise-of-javascript-microlibs/)

6. How many libraries have been written or ported to it?
7. What is the size of the runtime?
8. Is it easy to integrate with the front-end toolchain (webpack, browserify, etc...)?
9. Is it easy to integrate with JS libraries (ffi, definition file, etc...)?
10. Is the language consistent?
11. Is the output readable?
12. How difficult is to hire a developer?