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	# Attempt a certain action several times before giving up
	#
	# Usage: `attempt(3.times, rescue: RuntimeError) do ... end`
	#
	def attempt(times, options = {})
		times = times.is_a?(Enumerator) ? times.max : times.to_i

		begin
			attempt ||= 0
			puts "Checking (attempt #{attempt+1})..."

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require 'vessel'

class AdCrawler < Vessel::Cargo
	GAM_GET_SLOTS_JS = <<~JS.gsub(/\n/, '')
		googletag.pubads().getSlots().map(slot => ({
			adUnitPath: slot.getAdUnitPath(),
			slotElementId: slot.getSlotElementId(),
			sizes: slot.getSizes().map(size =>
			    typeof size == 'string' ? [0, 0] : [size.getWidth(), size.getHeight()])
	    }))

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require 'capybara'
require 'capybara/apparition'
require 'forwardable'

Capybara.threadsafe = true

Capybara.register_driver :apparition do |app|
  Capybara::Apparition::Driver.new(app, headless: true,
                                        js_errors: false,
                                        browser_logger: nil)

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#/usr/bin/env bash
# MIT © Sindre Sorhus - sindresorhus.com

# git hook to run a command after `git pull` if a specified file was changed
# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

check_run() {
	echo "$changed_files" | grep --quiet "$1" && eval "$2"

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def countwovels(str)
  for vowel in 'aeiouAEIOU'.chars
    count = str.count(vowel)
    if count == 1
      puts "#{vowel} appears #{count} time."
    elsif count >= 2
      puts "#{vowel} appears #{count} times."
    end
  end
end

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JS: Celsius to Fahrenheit (with tests)

Solving the Firehose Javascript challenge Celsius to Fahrenheit with tests.

Introduction

Before we begin, there is a piece of information missing from the challenge. When you run npm install --save readline-sync, you'll likely see an error like this:

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class Hello
  def greeting(name)
    "Hello, #{name}!"
  end
end

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module Anagram
  def self.match(base, candidates)
    base_fingerprint = fingerprint(base)
    candidates.select { |c| fingerprint(c) == base_fingerprint }
  end

  private

  def self.fingerprint(string)
    string.downcase.chars.sort

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defmodule Johnann do
  
  def john(n) when n >= 1 do
    john_and_ann(n)[:john] |> Map.values
  end
  
  def ann(n) when n >= 1 do
    john_and_ann(n)[:ann] |> Map.values
  end
  

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def john(n)
  john_and_ann(n)[:john]
end

def ann(n)
  john_and_ann(n)[:ann]
end

def sum_john(n)
    john(n).reduce(:+)