Loops Iteration

# vibe: 0.2

def sum_range(limit)
  total = 0
  for i in 1..limit
    total = total + i
  end
  total
end

def product_range(limit)
  product = 1
  for i in 1..limit
    product = product * i
  end
  product
end

def countdown_total(start)
  total = 0
  for i in start..1
    total = total + i
  end
  total
end

def total_with_each(values)
  total = 0
  values.each do |value|
    total = total + value
  end
  total
end

def double_values(values)
  values.map do |value|
    value * 2
  end
end

def select_above(values, threshold)
  values.select do |value|
    value > threshold
  end
end

def reduce_sum(values)
  values.reduce(0) do |running_total, value|
    running_total + value
  end
end

def run
  nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  {
    sum_range: sum_range(10),
    product_range: product_range(6),
    countdown: countdown_total(5),
    total_each: total_with_each(nums),
    doubled: double_values([3, 7, 11]),
    above_5: select_above(nums, 5),
    reduce: reduce_sum(nums)
  }
end