jballanc

(ns space-age)

(defn on-earth [seconds]
  (/ seconds 31557600.0))

(def orbital-periods
  {:mercury 0.2408467
   :venus   0.61519726
   :mars    1.8808158
   :jupiter 11.862615

swannodette

(ns react-cljs.core
  (:require-macros [reactjs.macros :refer [pure]])
  (:require React [reactjs.core :as r]))

(enable-console-print!)

(declare render-ui)

(defn render-counter [id state cb]
  (pure state

allgress

(ns reagent-test.core
  (:require [reagent.core :as reagent :refer [atom]]
            [datascript :as d]
            [cljs-uuid-utils :as uuid]))

(enable-console-print!)

(defn bind
  ([conn q]
   (bind conn q (atom nil)))

jcoglan

var BVT = function(width, depth, init, elems) {
  this._width = width;
  this._depth = depth;
  this._leaf  = depth === 1;

  this._shift  = (this._depth - 1) * Math.round(Math.log(width) / Math.log(2));
  this._himask = this._width - 1;
  this._lomask = Math.pow(2, this._shift) - 1;
  this._elems  = elems;
  

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

robert-stuttaford

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Connection

(defprotocol DatomicConnection
  (as-conn [_]))

(extend-protocol DatomicConnection
  datomic.Connection
  (as-conn [c] c)
  datomic.db.Db

acolyer

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

akiatoji

Clojure on Raspberry Pi with OS X

"Clojure running on Raspberry Pi" sounded so cool that I just had to give it a try.

Install JDK

• Download ARM JDK from Oracle and instlal on Raspberry Pi
• Change visudo to contain the following

stuarthalloway

(ns user)

(def app
  "Intenal Helper"
  (fnil conj []))

(defprotocol PathSeq
  (path-seq* [form path] "Helper for path-seq"))

(extend-protocol PathSeq

favila

(ns favila.datomic-util.restore-datoms
  "A \"manual\" datomic database restore.
  
  Writes raw datoms (stored in a stream written by d/datoms) to an empty database.
  Useful for memory databases: you can write out all the datoms in it, then read
  them into another database. (Note mem dbs have no log or retractions)."
  (:require [datomic.api :as d]
            [clojure.edn :as edn]))

(defrecord datom [e a v tx added?])