VictorTaelin

Make Ethereum massively scalable today with delayed computations

Suppose you're writing a contract which involves a huge amount of participants. As an example, think of an online, blockchain-based Trading-Card Game with tournaments. How would you program a playCard function? You might be thinking of something like this:

function playCard(uint player, uint card){
    ...
    else if (card == PROFESSOR_OAK){
        // shuffles the player's hand on his deck
 shuffleHand(player)

gfredericks

#!/usr/bin/env bash

#! top-of-file comments can be written using more #! lines, which 
#! is a valid comment in both clojure and bash

":";# alternately this works too

#! The construction below uses cross-language syntactic hackery to
#! specify the -Sdeps arg in a part of the file that's interpreted
#! by clojure as clojure syntax (i.e., not a line comment), so it 

xfthhxk

(ns js-fetch
  (:require [promesa.core :as p]
            [clojure.string :as str])

(defn serialize
  [content-type data]
  (pr-str data))

(defn deserialize
  [content-type text]

retrogradeorbit

#!/usr/bin/env spire

;; spin up a digital ocean droplet
;; build latest acmetool
;; patch and update debian package
;; download acmetool binary and new package
;; destroy droplet

;; requirements:
;; spire 0.1.0-alpha.15 or above

rgkirch

current re-frame app state as a fold over events

https://day8.github.io/re-frame/EffectfulHandlers/

at any one time, the value in app-db is the result of performing a reduce over the entire collection of events dispatched in the app up until that time. The combining function for this reduce is the set of registered event handlers.

alandipert

ClojureScript macros: kinda, sorta, not really.

ClojureScript does not have a standalone macro system. To write ClojureScript macros, one must write them in Clojure and then refer to them in ClojureScript code. This situation is workable, but at a minimum it forces one to keep ClojureScript code and the macros it invokes in separate files. I miss the locality of regular Clojure macros, so I wrote something called maptemplate that gives me back some of what I miss. The technique may be useful in other scenarios.

Problem

Suppose you're wrapping functionality in another namespace or package so that you can have your own namespace of identically named but otherwise decorated functions:

ClojureScript:

simonw

# Fetch latest configuration:
*/5 * * * * cd /home/ubuntu/dogsheep-config && python3 git_pull_and_run_scripts.py . && sudo python3 ensure_symlinks.py files-to-symlink

# Goodreads
46 * * * * cd /home/ubuntu && /home/ubuntu/datasette-venv/bin/goodreads-to-sqlite books goodreads.db -a auth.json

# Twitter
1,11,21,31,41,51 * * * * /home/ubuntu/datasette-venv/bin/twitter-to-sqlite user-timeline /home/ubuntu/twitter.db -a /home/ubuntu/auth.json --since
2,7,12,17,22,27,32,37,42,47,52,57 * * * * run-one /home/ubuntu/datasette-venv/bin/twitter-to-sqlite home-timeline /home/ubuntu/timeline.db -a /home/ubuntu/auth.json --since
4,14,24,34,44,54 * * * * run-one /home/ubuntu/datasette-venv/bin/twitter-to-sqlite mentions-timeline /home/ubuntu/twitter.db -a /home/ubuntu/auth.json --since

jackrusher

Meld

A minimal example of creating a (mostly) working FUSE filesystem using Clojure. NOTE: I have only tested this with OSX, and it assumes you have already installed libfuse.

Trying it out

Create an empty directory at /tmp/meld to serve as your mount point, put these files in a directory called meld, then:

bhb

Friendly

A beginner-friendly REPL that combines

• rebel-readline
• Expound
• Speculative

Usage

richhickey

(require '[clojure.core.async :as a])

(def xform (comp (map inc)
              (filter even?)
              (dedupe)
              (flatmap range)
              (partition-all 3)
              (partition-by #(< (apply + %) 7))
              (flatmap flatten)
              (random-sample 1.0)