Each

Single line

numbers = [1,2,3,4]

numbers.each { |n| puts n }

Multi-line

numbers = [1,2,3,4]

numbers.each do |n|

print n

end

Each with a hash:

hash = { bacon: 300, coconut: 200 }

hash.each { |key,value| puts "#{key} price is #{value}" }

Each with index: Single Line

animals = ["cat", "dog", "tiger"]

animals.each_with_index { |animal, idx| puts "We have a #{animal} with index #{idx}" }

Each Index:

animals = ["cat", "dog", "tiger"]

animals.each_index { |animal, idx| puts "We have a #{animal} with index #{idx}" }

Each with index: Multi Line

• This is one of the closest to Java's regular for loop

• Java

String[] animals = { "cat", "dog", "tiger" };

for(int count = 0; count < animals.length; count++){

System.out.println(animals[count]);

}

• Ruby

animals = ["cat", "dog", "tiger"]

animals.each_with_index do |animal, idx|

puts "We have a #{animal} with index #{idx}"

end

# output:

We have a cat with index 0

We have a dog with index 1

We have a tiger with index 2

=> ["cat", "dog", "tiger"]