ghoseb

;;
;; NS CHEATSHEET
;;
;; * :require makes functions available with a namespace prefix
;;  and optionally can refer functions to the current ns.
;;
;; * :import refers Java classes to the current namespace.
;;
;; * :refer-clojure affects availability of built-in (clojure.core)
;;   functions.

mmcgrana

(require '[clj-serializer.core :as serializer])
(require '[clj-json.core :as m-json])
(require '[org.danlarkin.json :as dl-json])
(require '[clojure.contrib.json.read :as cc-json-read])
(require '[clojure.contrib.json.write :as cc-json-write])

(defn nano-time []
  (System/nanoTime))

(defn timed [task]

seth

#!/usr/bin/env ruby

def find_deps(cookbook_dir)
  nel = Hash.new { |h, k| h[k] = [] }
  Dir.glob("#{cookbook_dir}/*/").each do |r|
    deps_for(r, nel)
  end
  nel
end

josevalim

# In your test_helper.rb
class ActiveRecord::Base
  mattr_accessor :shared_connection
  @@shared_connection = nil

  def self.connection
    @@shared_connection || retrieve_connection
  end
end

alandipert

(ns org.dipert.reconfig
  "Reads a file of Clojure data into *config*
   when a SIGHUP is recieved.

   Useful for  daemons that support the reloading of 
   configuration data while running."
  (:use [clojure.contrib.io :only (reader)]
        [clojure.contrib.logging :only (info warn)])
  (:import (sun.misc Signal SignalHandler)
           (java.io File PushbackReader)))

mnutt

Instrument Anything in Rails 3

With Rails 3.0 released a few weeks ago I've migrated a few apps and I'm constantly finding useful new improvements. One such improvement is the ability to log anything in the same way that Rails internally logs ActiveRecord and ActionView. By default Rails 3 logs look slightly spiffier than those produced by Rails 2.3: (notice the second line has been cleaned up)

Started GET "/" for 127.0.0.1 at Mon Sep 06 01:07:11 -0400 2010
  Processing by HomeController#index as HTML
  User Load (0.2ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1

Rendered layouts/_nav.html.erb (363.4ms)

juergenhoetzel

(defn mapmap
  "Return a new map, mapping keys to (keyfn key) and mapping values to
(valfn val)"
  ([valfn map]
     (mapmap identity valfn map))
  ([keyfn valfn map]
     (persistent! (reduce 
		   (fn [c [k v]] (assoc! c (keyfn k) (valfn v)))
		   (transient {})
		   map))))

jimweirich

# Allow RSpec assertions over the elements of a collection.  For example:
#
#   collection.should all_be > 0
#
# will specify that each element of the collection should be greater
# than zero.  Each element of the collection that fails the test will
# be reported in the error message.
#
# Examples:
#   [1,1,1].should all_be eq(1)

pjb3

require 'benchmark'

puts
puts ENV["RUBY_VERSION"]

class A
  def initialize(foo)
    @foo = foo
  end
  def foo

copiousfreetime

class A
  def implicit_block_implicit_ensure
    begin
      "block"
    ensure
      "ensure"
    end
  end

  def implicit_block_explicit_ensure