ckirkendall

(use '[clojure.core.match :only [match]])

(defn evaluate [env [sym x y]]
  (match [sym]
    ['Number]   x
    ['Add]      (+ (evaluate env x) (evaluate env y))
    ['Multiply] (* (evaluate env x) (evaluate env y))
    ['Variable] (env x)))
    
(def environment {"a" 3, "b" 4, "c" 5})

oleganza

In reply to "@Vlad_Roberto: No, not a programmer. I just know there's better ways to doing anything without massive energy consumption & Banks."

The problem of blockchain synchronization is the following:

Imagine you are sitting in a bunker. You have no idea what people are out there and what are their intentions. You only receive some incoming messages from strangers that may contain anything. They can be just random garbage or deliberately crafted messages to confuse you or lie to you. You never know. You cannot trust anyone.e

The problem of "money" or any other "social contract" is that everyone should be able to know what the majority agrees to without trusting some intermediaries (otherwise they can easily obuse their special position). If everyone votes for "X", then you sitting in a bunker must somehow independently figure out that all those other people indeed voted for "X" and not for "Y" or "Z". But remember: you cannot trust anyone's message and messages are the only thing you get from the outsi

martinklepsch

(ns oxygen.client
  "A minimal Clojure client for Airtable.com's HTTP API.
   Supports retrieval of whole tables as well as individual records.
   Dependencies: [org.clojure/data.json \"0.2.6\"] [clj-http \"2.0.0\"]"
  (:require [clojure.data.json :as json]
            [clojure.string :as string]
            [clojure.set :as set]
            [clj-http.client :as client]))

(def api-base "https://api.airtable.com/v0")

smarr

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. It is the officle getting-started project: https://github.com/graalvm/simplelanguage

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

polbins

Create Android Studio Command-line Launcher

0. Open Android Studio
1. Go to: Tools > Create Command-line Launcher
2. Leave as default, Press OK

Configure Git to use Android Studio as default Diff Tool

1. Add the following lines to your .gitconfig

klaaspieter

From time to time, Musk will send out an e-mail to the entire company to enforce a new policy or let them know about something that's bothering him. One of the more famous e-mails arrived in May 2010 with the subject line: Acronyms Seriously Suck:

There is a creeping tendency to use made up acronyms at SpaceX. Excessive use of made up acronyms is a significant impediment to communication and keeping communication good as we grow is incredibly important. Individually, a few acronyms here and there may not seem so bad, but if a thousand people are making these up, over time the result will be a huge glossary that we have to issue to new employees. No one can actually remember all these acronyms and people don't want to seem dumb in a meeting, so they just sit there in ignorance. This is particularly tough on new employees.

That needs to stop immediately or I will take drastic action - I have given enough warning over the years. Unless an acronym is approved by me, it should not enter the SpaceX glossary.

bhb

Friendly

A beginner-friendly REPL that combines

• rebel-readline
• Expound
• Speculative

Usage

jdh30

type Json =
  | Null
  | Bool of bool
  | Number of float
  | String of string
  | Array of Json list
  | Object of (string * Json) list

type Bracket = Open | Close

pjstadig

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:

katox

;;
;; http://johnj.com/from-elegance-to-speed.html
;;
;; The Clojure version
;; -------------------

(ns smt
  (:require [net.cgrand.xforms :as x]
            [criterium.core :as c :refer [quick-bench]]))