Array Notes

arashes.rb

# create simple array
array = [1,2,3,4,5]
# Iterate through each value
array.each {|num| puts num * 20 }
puts num
# You're gonna have a bad time
# plays nice with variable outside
x = 2
array.each {|num| puts num * 20 + x }

# other handy ones
10.times{ puts "This class is awesome"}

1.upto(10){|num| puts "#{num} it is!"}

10.downto(1) do |num| 
  puts "#{num}!"
  sleep 1
end
puts "Happy New Year!"

# return values

# #map runs a calculation on data
my array = [1,2,3,4,5,6,7,8,9,10]
my_array.map{|num| num * 10}
my_array.find {|i| i == 5 }
# Same as detect
my_array.find {|i| i % 3 == 0 }

# Same as select
my_array.find_all {|i| i % 3 == 0 }

my_array.reject {|i| i % 3 == 0 }

my_array.any? {|i| i % 3 == 0 }

my_array.all? {|i| i % 3 == 0 }