Odin ruby week 1
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This document provides information about an Odin Ruby study group and includes code examples. It introduces Brian as the guide for the study group and provides contact information. It also lists some additional Ruby resources for members to check out. The document then provides examples of defining a Car class and creating car parts using classes and methods. It shares a procedural approach to listing multiples of 3 and 5 below 1000 and calculating their sum. It also demonstrates finding the least common denominator of an array of numbers using the lcm method. The document emphasizes the importance of practice for learning Ruby.
![Hello I am Brian
I will be you guide
@brianllamar
ilikerobot[at]gmail](https://image.slidesharecdn.com/odinrubyweek1-140505090832-phpapp02/85/Odin-ruby-week-1-2-320.jpg)
![class Multiples
def multi_pulls
# set range variable 1..1000
numbers = Array(1...1000) # inclusive range
multi_pulls = [] # create a new array
for i in numbers # loop that runs through every number in the array
if i % 3 == 0 || i % 5 == 0 # finds only numbers in array that are multiples of 3 and 5
multi_pulls << i # add those multiples to the new array
end
end
multi_pulls # puts final multiple array
end
def sum_of_multiples(multi_pulls) # method to find the sum of the multipes array
sum = 0 # create sum variable
multi_pulls.each {|i| sum += i } # formula to take each number in array and add to sum variable, which creates the sum of
multiples.
puts sum # returns the sum
end
end
m = Multiples.new # create a new class
m.sum_of_multiples(m.multi_pulls) # calls the sum of the multiples](https://image.slidesharecdn.com/odinrubyweek1-140505090832-phpapp02/85/Odin-ruby-week-1-11-320.jpg)
Odin ruby week 1
- 1. Odin Ruby Study Group
- 2. Hello I am Brian I will be you guide @brianllamar ilikerobot[at]gmail
- 3. Extras Sign up for Odin G+ Community Sign up for Ruby Newbie Group - both will assist in helping While you are at it Sign up for the Ruby Community.
- 4. Odin Project is open sourced
- 5. In Ruby Everything is an Object
- 6. Define Car Class class Car # code goes inside end
- 7. create Car parts class Car def initialize # method # part go here end end
- 8. Create car parts class Car def initialize # method @engine = Engine.new @wheels = 4.times.map { Wheel.new } end end
- 9. Let get Proceduaral (Law & Order)
- 10. My approach is always different # # If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. # # Find the sum of all the multiples of 3 or 5 below 1000. # Pseudo # set range 1..1000 # set the if statment to find the multiples of 3 and 5 # use if statement to add nums divisible by 3 and 5 to be added to a new_range array. # create method that adds the new_range numbers to create a sum. # call the Multiple class using the muli_pulls method and sum_of_multiples method
- 11. class Multiples def multi_pulls # set range variable 1..1000 numbers = Array(1...1000) # inclusive range multi_pulls = [] # create a new array for i in numbers # loop that runs through every number in the array if i % 3 == 0 || i % 5 == 0 # finds only numbers in array that are multiples of 3 and 5 multi_pulls << i # add those multiples to the new array end end multi_pulls # puts final multiple array end def sum_of_multiples(multi_pulls) # method to find the sum of the multipes array sum = 0 # create sum variable multi_pulls.each {|i| sum += i } # formula to take each number in array and add to sum variable, which creates the sum of multiples. puts sum # returns the sum end end m = Multiples.new # create a new class m.sum_of_multiples(m.multi_pulls) # calls the sum of the multiples
- 12. sample_array = (20.downto(1)).to_a # create the array 1 to 20 least_common_denominator = sample_array.inject(:lcm) # find the least common denominator using using the lcm method between each integer in the array puts least_common_denominator
- 14. New Schedule
- 15. Discussion