Some example of array methods in Ruby

arrays.rb

#  You can loop through a range
(1..10).each {|a| puts a }

first_ten = (1..10).to_a

#  You can convert it into an array
puts first_ten.inspect

puts "selecting odd numbers"

odd_numbers = first_ten.select {|a| a.odd? }
puts odd_numbers.inspect

# Modify the array directly
first_ten.select! {|a| a.odd? }
puts first_ten.inspect

# One line
puts (1..10).select {|a| a.odd? }.inspect


(1..10).each {|a| puts a * 10 }


first_ten_times = (1..10).map {|a| a * 10 }
puts first_ten_times.inspect

integers = ["1", "2", "3", "4", "5"].map {|a| a.to_i * 5 }
puts integers.inspect


# This can be done this way too
string_array = ["1", "2", "3", "4", "5"]
integers = []
integers << string_array[0].to_i * 5
integers << string_array[1].to_i * 5
integers << string_array[2].to_i * 5
integers << string_array[3].to_i * 5
integers << string_array[4].to_i * 5
puts integers.inspect


# or this way
integers = []
for a in string_array
  integers << a.to_i * 5
end
puts integers.inspect