Some notes on clojure

why_clojure.html

Why Clojure

Clojure Made Simple: https://www.youtube.com/watch?v=VSdnJDO-xdg
What is Clojure?

    lisp on the JVM
    REPL
    immutable data structures
    datomic
        ACID
        accumulate only (q.v. immutable data structures)
        timetravel (query database at different points in time.) 
    the problem solving idea:
        describe your problem
        create a DSL (Domain Specific Language) to describe the problem
        solve the problem 

Who uses Clojure?

    walmart labs -- now, there's no downtime on blackfridays
    IBM (reduction in java code from 50k lines -> 10k lines)
    storm was originally written in clojure
    process a large amount of data
    convenient concurrency
    gene kim: https://itrevolution.com/love-letter-to-clojure-part-1/ 

https://enterpriseclojure.com/clojure/0-introduction.html
Benefits of Clojure

    great community: https://www.clojurians-zulip.org/ (also a slack)
    access to all the Java code... without the Java code
    stable syntax (unlike java and javascript, which is adding new syntax about every 6 months, e.g. Java's project Loom, multiline strings, and JavaScript.. has a lot of churn with libraries and frameworks.
    One Ring To Rule Them All:
        access to all the python code via lib-python
        shadow-cljs for javascript (installed via npm)
        babashka or planck for scripts like you'd write with python 
    Addressing Python warts
        deployment
        GUI
        all this package updating
        no virtualenv shenanigans 

Examples

    using the repl
    creating a project
    webservice
    scraping
    plotting in nextjournal.com 

Data Science in Clojure

    burgeoning community: https://github.com/scicloj
    or tools: https://github.com/joinr/spork
    incanter: http://incanter.org/
    deep learning: https://aiprobook.com/deep-learning-for-programmers/ (no C++, just Clojure! and it's fast!) 

tutorials

http://www.unexpected-vortices.com/clojure/brief-beginners-guide/general-overview.html

Beginner's Guide to Clojure: http://www.unexpected-vortices.com/clojure/brief-beginners-guide/libs-management-and-use.html#various-java-libraries

Brave Clojure: https://www.braveclojure.com

PurelyFunctionalTv:

parsing xml: https://juxt.pro/blog/posts/xpath-in-transducers.html