iterators.rb

# each
def my_each(array)
  i = 0 
  until i == array.length do
    yield(array[i])
    i+=1
  end
  array
end


# collect
def my_collect(array)
  new_array = []
  i = 0 
  until i == array.length do
     new_array << yield(array[i])
    i+=1
  end
  new_array
end


# select
def my_select(array)
  selection_from_array = []
  i = 0 
  until i == array.length do
    if yield(array[i])
      selection_from_array << array[i]
    end
    i+=1
  end
  selection_from_array
end


# none
def my_none?(array)
  i = 0 
  until i == array.length do
    if yield(array[i])
      false
    end
    i+=1
  end
  true
end