Iterators

Iterators allow you to loop over objects such as arrays and strings.

each

each allows you to pass each item inside an iterable to a function body. You do that as follows:

my_iterable.each do |item_variable|
    ...
end

where item_variable is the item of the iterable that the iterator is currently on.

You can also pass the corresponding index of the item as well using with_index:

my_iterable.each.with_index do |item_variable, index|
    ...
end