How to iterate over all but first element of an enumerable

How about this?

[1,2,3].drop(1).each {|x| puts x }
# >> 2
# >> 3

Here's how you can continue walking the iterator

a = [1,2,3]

b = a.each # => #<Enumerator: [1, 2, 3]:each>
b.next # skip first one

loop do
  c = b.next
  puts c
end
# >> 2
# >> 3

You could do

a.drop(1).each do |x| puts x end

EDIT:

Use the map method

b = [1,2,3].drop(1).map{|x| x}
=> b will be [2, 3]

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