iterators.rb

def my_each(array)
  i = 0
	while i < array.length
		raise (yield(array[i])).inspect
		i+=1
	end
	array
end
array = [1, 2, 3]

my_each(array) do |i|
	i*i
end

def my_collect(array)
	i = 0
	collect = []
	while i < array.length
		collect << yield(array[i])
		i+=1
	end
	collect
end
array = [1, 2, 3]

my_collect(array) do |i|
	i*i
end

def my_select(array)
	i = 0
	select = []
	while i < array.length
		if (yield(array[i]))
		select << array[i]
		i+=1
	end
	select
end
array = [1, 2, 3]

my_select(array) do |i|
	i.is_odd?
end

def my_none?(array)
	i = 0
	while i < array.length
		if (yield(array[i]))
			return false
		end
		i += 1
	end
	true
end
array = [1, 2, 3]

my_none?(array) do |i|
	i.is_a?(String)
end