josephsiefers

class BigInt

	attr_accessor :digits

	def initialize(num_str=nil)
		@digits = [0]

		return if num_str.nil?

		@digits = num_str.split("").reverse.map(&:to_i)

josephsiefers

ObjectSpace.each_object(SqsWorkers::Manager).next.thread_list.inspect

josephsiefers

#date >> /tmp/MyLaunchdTest.out
docker ps -a | grep 'Exited' | awk '{print $1}' | xargs docker rm
docker images | grep "^<none>" | awk '{print $3}' | xargs docker rmi

josephsiefers

docker ps -a | grep 'Exited' | awk '{print $1}' | xargs docker rm
docker images | grep "^<none>" | awk '{print $3}'| xargs docker rmi

josephsiefers

#step-by-step function, feel free to follow along in IRB
def reverse_each_word(sentence)
  reverse_each_word = sentence.split(' ')
  #collect is also known as map in some other languages, basically it takes a set A and transforms it into a set B
  reversed_words = reverse_each_word.collect { |word| word.reverse }
  #join does the logical OPPOSITE of split, it takes an array and creates a string according to a split character
  reversed_words.join(' ')
end

#even more succinctly, leveraging the power of Ruby idioms and syntatic sugar, the whole function in can be written in ONE LINE

josephsiefers

def speaking_grandma(response)
 #you are close here
 #if response = downcase
 if response == response.downcase
   puts "HUH! SPEAK UP, SONNY!"
 else
  puts "NO, NOT SINCE 1938!"
 end
end

josephsiefers

def prime? n
  for d in 2..(n - 1)
   if (n % d) == 0
    return false
   end
  end
  #implicit return of the range from the for loop unless you return a value yourself, as seen below:
  return true
end

josephsiefers

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

josephsiefers

access_key_id: xxx
secret_access_key: yyy

josephsiefers

#http://stackoverflow.com/questions/67093/how-do-i-quickly-rename-a-mysql-database-change-schema-name?page=1&tab=votes#tab-top
for table in `mysql -h $host -u root -P $port --password=$password -w -N -e "show tables from $schema"`; do 
mysql -h $host -u root -P $port --password=$password -w -N -e "rename table $schema.$table to $schema_two.$table"; 
done;