Download Perry Cabugao 11260564 Seatwork #9 Programmatic examples: If

Perry Cabugao
11260564
Seatwork #9
Programmatic examples:
If else statement:
User1 = 90
User2 = 95
If User1 > User2
Puts “User 1 is better than User2”
Else
Puts “User 2 is better the User1”
Iteration and Loops
X=0
While x < 10
Print “#{i}”
X+=1
End
Other way of printing 1-10
Printing by ones
1.upto(10) {|i| print “#{i}”}
Printing by twos
1.step(10, 2) {|i| print “#{i}”}
Declaring Constants
x1_CONST = “Perry The Plattypus”
x2_CONST = x1_CONST
Puts x1_CONST this will display Perry The Plattypus
Puts x2_CONST this will display the value of x1_CONST which is Perry The
Plattypus
Declaring Variables
($)x = “Pers” this is for global values
class Polygon
@sides = 6 this is for instance variables
End
Class Polygon
@@sides = 6  this is for class variables
Def self.sides
@@sides
End
End
Keyword Arguments
def foo(bar: 'default')
puts bar
end
foo # => 'default'
foo(bar: 'baz') # => 'baz'
https://robots.thoughtbot.com/ruby-2-keyword-arguments
Universal Truth
# in Ruby
if 10
puts "0 is true"
else
puts "0 is false"
end
Prints “0 is true”.
Method Access
class Person
def initialize(age)
@age = age
end
def age
@age
end
def compare_age(c)
if c.age > age
"The other object's age is bigger."
else
"The other object's age is the same or smaller."
end
end
protected :age
end
chris = Person.new(25)
marcos = Person.new(34)
puts chris.compare_age(marcos)
#puts chris.age
http://rubylearning.com/satishtalim/ruby_access_control.html
Blocks are Objects,
10.times do |i|
print "#{i} "
end
numbers = [1, 2, 5, 6, 9, 21]
numbers.each do |x|
puts "#{x} is " + (x >= 3 ? "many" : "few")
end
squares = numbers.map {|x| x * x}
Operators are syntactic sugar
class NewDog
def initialize(breed, name)
@breed = breed
@name = name
end
attr_reader :breed, :name # create reader only
end
nd = NewDog.new('Doberman', 'Benzy')
puts nd.name
http://rubylearning.com/satishtalim/ruby_syntactic_sugar.html