FZs Ruby Cheat Sheet

#this is a comment

#this is an array assignment
numbers = [0,1,2,3,4,3,5,6,7,8]

#this is an array assignment from a range
puts "*****Numbers******"
numbers.each{|number| puts number}

puts "****Even numbers******"
numbers.each do |number|
  puts number if number % 2 == 0
end 
#odd
numbers.each{|number| puts number if number%2!=0 }

puts "Unique Numbers"
numbers.uniq.each{|number| puts number}

puts "*****Person Hash****"
person = {name: "joe", age: 22, url: "url1", shorturl: "short url"}

puts person
puts person[:name]

puts "******person.each if they contain prop url*******"
person.each{ |key, value| puts "#{key}: #{value}" if "#{key}".include?("url")}

puts "********methods********"
"joe".methods.each { |method| puts method if "#{method}".include?"sum"}

puts "********get input********"
puts "What is your name?"
#name = gets.chomp

puts "***default return using area example****"
def area(w,h)
   w*h
end

puts "area of w:#{10} h: #{5} #{area(10,5)}"

puts "*****Classes Using Person******"
class Person
  attr_accessor :first_name, :last_name
  
  def initialize(first_name, last_name)
    @first_name = first_name
    @last_name = last_name
  end

  def to_s
    "#{@first_name} #{@last_name}"
  end
end

person = Person.new("John", "Smith")
person.first_name = "Mike"
puts "person.first_name: #{person.first_name}"
puts "person: #{person}"

puts "*****mapped*********"
mapped = [1,2,3].map{|item| "item: #{item}"}
puts mapped

puts "******array from range*******"
array_from_range = (0..10).to_a()
puts array_from_range

puts "******for loop******"

for i in 0..5
  puts i
end
puts "***** if elsif******"
if true && true 
  puts "true and true"
elsif true || false
  puts "will never reach this"
else
  puts "never here"
end