russ

token whitespace = /[ \n\t]+/ [ skip ];
token true = /true/;
token false = /false/;
token and = /and/;
token or = /or/;

rule S = expr;
rule expr = tkn | expr and tkn | expr or tkn;
rule tkn = true | false;

russ

docker run -it homebrew/brew                                          Unable to find image 'homebrew/brew:latest' locally
latest: Pulling from homebrew/brew                                      e92ed755c008: Pull complete 
b9fd7cb1ff8f: Pull complete 
ee690f2d57a1: Pull complete 
53e3366ec435: Pull complete 
5ab15df03195: Pull complete 
10ac880b02d1: Pull complete 
bddb162b792c: Pull complete 
Digest: sha256:fc1a1df1056c47660b0bc23e690cd2f9d6d2c3176513fea7d40d669ad2823dd1
Status: Downloaded newer image for homebrew/brew:latest                 root@816c4762d86c:/home/linuxbrew# brew install crystal

russ

#!/usr/bin/bash

pegasus < parser.grammar > parser.json
pegasus-crystalsem -l parser.json -a parser.sem -s parser.cr

crystal test.cr

russ

DROP TABLE videos;
DROP TABLE video_releases;
DROP TABLE actors;
DROP TABLE performances;

CREATE TABLE videos (
    id            integer NOT NULL,
    title         varchar(40) NOT NULL
);

russ

class Seller < ActiveRecord::Base
  has_one :business


  accepts_nested_attributes_for :business

  devise :database_authenticatable, :registerable, :token_authenticatable,
         :lockable, :timeoutable, :recoverable, :rememberable, :trackable, :validatable

  attr_accessible :email, :password, :last_name, :first_name, :remember_me, :business_attributes

russ

class Seller < ActiveRecord::Base
  has_one :business


  accepts_nested_attributes_for :business

  devise :database_authenticatable, :registerable, :token_authenticatable,
         :lockable, :timeoutable, :recoverable, :rememberable, :trackable, :validatable

  attr_accessible :email, :password, :last_name, :first_name, :remember_me, :business_attributes

russ

  namespace :sync do
    desc "Backs up heroku database and restores it locally"
    task production: :environment do
      Bundler.with_clean_env do
        system("heroku pgbackups:capture --expire --remote production")
        timestamp = Time.now.utc.strftime("%Y%m%d%H%M%S")
        system("curl -o ../pgbackups/production_#{timestamp}.dump --create-dirs `heroku pgbackups:url --remote production`")
        last_backup = Dir.entries("../pgbackups").last
        database = Rails.configuration.database_configuration[Rails.env]['database']
        system("pg_restore --verbose --clean --no-acl --no-owner -d #{database} ../pgbackups/#{last_backup}")

russ

require 'lastfm'

API_KEY = 'XXX'
API_SECRET = 'XXX'

lastfm = Lastfm.new(API_KEY, API_SECRET)
# token = lastfm.auth.get_token
token = '435708b60cde32b6df36b8585fe75725'

# open http://www.last.fm/api/auth/?api_key=XXXX&token=token

russ

require 'lastfm'

API_KEY = 'XXX'
API_SECRET = 'XXX'

lastfm = Lastfm.new(API_KEY, API_SECRET)
# token = lastfm.auth.get_token
token = '435708b60cde32b6df36b8585fe75725'

# open http://www.last.fm/api/auth/?api_key=XXXX&token=token

russ

{"details":"Ambiguous oauth credentials provided","problem":"You are not authorized to make that request","code":"ambiguous_credentials"}