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class PdfMerger
  
  def merge(pdf_paths, destination)
    
    first_pdf_path = pdf_paths.delete_at(0)
    
    Prawn::Document.generate(destination, :template => first_pdf_path) do |pdf|
      
      pdf_paths.each do |pdf_path|
        pdf.go_to_page(pdf.page_count)

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def positional_arguments(arg1, arg2, arg3)
  puts [arg1, arg2, arg3].join(' ')
end

positional_arguments('Hello', 'Jean Luc', 'Picard')

def positional_with_hash(arg, opts = {})
  puts [arg, opts[:firstname], opts[:lastname]].join(' ')
end

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FROM httpd:2.4.23

# autoconf - needed for building debugger
# curl - useful tool for debugging in the container
# mysql-client - because we're using MySQL 5.7 on a different container
# libmysqlclient-dev - needed for mysql_config, option needed to get MYSQLI driver in compile
# gcc, make - need a C compiler to build PHP
# libxml2-dev - dependency for compiling PHP
RUN apt-get update && apt-get install -y \
    autoconf \

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# app/lib/market_data_pull/tdameritrade/api_operation.rb
# Include this module inside of a class and then to use it, call
# 
# perform_request { |client| client.<operation method> }
#
module MarketDataPull; module TDAmeritrade
  module APIOperation
    module_function

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# docker-compose.yml
version: '3'

services:
  web:
    build: ./
    command: 'rails server -b 0.0.0.0 -p 3000'
    ports:
      - 4000:3000

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module IndentUtil
  INDENT_SIZE = 2

  def indent_chars(indent_level)
    ' ' * INDENT_SIZE * indent_level
  end
end

class PrettifyObject
  MAX_LINE_SIZE = 120

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/ views/refinery/_header.html.slim

nav#logo.navbar.navbar-light.navbar-expand(itemtype = "http://schema.org/Organization")
  = link_to(Refinery::Core.site_name, refinery.root_path, class: 'navbar-brand', itemprop: 'url')

  = cache [I18n.locale, 'main_menu', @page, Refinery::Page.fast_menu.map(&:updated_at).max] do
    = bootstrap_main_menu(refinery_menu_pages, self).to_html

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# Here's a contrived example of a LEFT JOIN using ARel. This is an example of
# the mechanics, not a real-world use case.

# NOTE: In the gist comments, @ozydingo linked their general-purpose ActiveRecord
# extension that works for any named association. That's what I really wanted!
# Go use that! Go: https://gist.github.com/ozydingo/70de96ad57ab69003446

# == DEFINITIONS
# - A Taxi is a car for hire. A taxi has_many :passengers.
# - A Passenger records one person riding in one taxi one time. It belongs_to :taxi.

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After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install postgresql@9.6
brew unlink postgresql@9.6
brew link postgresql

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Installing Postgres via Brew

Pre-Reqs

Brew Package Manager

In your command-line run the following commands:

1. brew doctor
2. brew update