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Introductory Material

• Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/

• The SimpleLanguage, an example of using Truffle with great JavaDocs https://github.com/graalvm/simplelanguage

• Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides

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;; Count a sequence
(fn [coll] 
  (reduce (fn [c _] (inc c)) 0 coll))

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(fn [coll] 
  (reduce conj '() coll))

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(partial reduce +)

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(fn [num]
  (take num (map first (iterate (fn [[a b]] [b (+' a b)]) [1 1]))))  
  

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(fn [input]
  (if (coll? input)
    (= input (reverse input))
    (= input (clojure.string/join "" (reverse input)))))

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The Pledge

One thing that always made me a little sad about transducers was how map lost its ability to iterate multiple collections in parallel. This is actually my favorite feature of map. For example:

(map + (range 5) (range 5 10))
=> (5 7 9 11 13)

One somewhat practical use of this is if you want to compare two sequences, pairwise, using a comparator. Though I wish that every? took multiple collections, this is an adequate substitute:

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==== Testing JVM version
==== Testing JVM version

lein test clj-kondo.analysis-test

lein test clj-kondo.compojure-test

lein test clj-kondo.core-test

lein test :only clj-kondo.core-test/run!-test

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# Check your changes compared to master with clj-kondo:
git diff  `git merge-base origin/master HEAD` --name-only |grep -e '.clj$' | (cd `git root`; xargs clj-kondo --lint)

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class Clojure < Formula
  desc "The Clojure Programming Language"
  homepage "https://clojure.org"
  url "https://download.clojure.org/install/clojure-tools-1.10.1.510.tar.gz"
  sha256 "c6e003f612bdd7f9a9baa6d86deafb2d51b411310077c83c9ed13bc649c13b18"
  revision 1

  bottle :unneeded

  depends_on "rlwrap"