dazld

;; After connecting an nrepl client repl to an nrepl server, some
;; output will still appear on stdout from the server.

;; Try these snippets - they will both produce output on the nrepl server
;; Java libraries commonly do both these things.

(.println System/out "Hello stdout.")
(.start (Thread. #(println "Hello from a new thread.")))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

dazld

(def tx-fns
  [{:db/ident :db.fn/reset-attribute-values
    :db/doc "Transaction function which accepts an entity identifier, attribute identifier
 and set of values and expands to any additions and retractions necessary to
 make the final post-transaction value of the attribute match the provided
 values. Attribute values must be scalars.
 
 If multiple values are provided on a cardinality-one attribute you will get a
 datom conflict exception at transaction time."
    :db/fn    (d/function

dazld

;; Datomic example code

;; demonstrates various update scenarios, using a news database
;; that contains stories, users, and upvotes

;; grab an in memory database
(use '[datomic.api :only (q db) :as d])
(def uri "datomic:mem://foo")
(d/create-database uri)
(def conn (d/connect uri))

dazld

// by dave @ beesandbombs.tumblr.com >:)

void setup() {
  setup_();
  result = new int[width*height][3];
  result_ = new int[width*height][3];
}

int[][] result, result_;
float time;

dazld

fireplace

• cpr => (require ... :reload)
• cpR => (require ... :reload-all)

Evaluation

• :Eval (clojure code) => runs (clojure code) in repl
• cpp => evaluate inn-most expessions under cursor
• cp\<movement> => evaluate text described by <movement>
• cqp => opens quasi-repl
• cqc => quasi-repl command line window

dazld

[ 
  {"name": "Afghanistan", "code": "AF"}, 
  {"name": "Åland Islands", "code": "AX"}, 
  {"name": "Albania", "code": "AL"}, 
  {"name": "Algeria", "code": "DZ"}, 
  {"name": "American Samoa", "code": "AS"}, 
  {"name": "AndorrA", "code": "AD"}, 
  {"name": "Angola", "code": "AO"}, 
  {"name": "Anguilla", "code": "AI"}, 
  {"name": "Antarctica", "code": "AQ"}, 

dazld

'use strict';

var assert = require('assert'),
    director = require('director'),
    EventEmitter = require('events').EventEmitter,
    ns = require('continuation-local-storage').createNamespace('testing'),
    express = require('express'),
    app = express();

dazld

var local = require('./namespace-module');
var http = require('http');
var uuid = require('uuid').v4;


http.createServer(function(req, res) {
    req._id = uuid();
    local.run(function() {
        local.set('id', req._id);
        next(req, res);

dazld

Working with domains

dazld

// In this example we'd like to have a factory that works per request and allows to keep track of created Models
// We create a factory per request and pass it around to the parts of the code that need access
// This can quickly lead to hard to messy code 

// factory.js
// 
// Basically a factory for factories
// For every request we create a new one

var Model = require('backbone').Model;