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Contents
defmodule Change do
@doc """
Determine the least number of coins to be given to the user such
that the sum of the coins' value would equal the correct amount of change.
It returns {:error, "cannot change"} if it is not possible to compute the
right amount of coins. Otherwise returns the tuple {:ok, list_of_coins}
## Examples
iex> Change.generate([5, 10, 15], 3)
{:error, "cannot change"}
iex> Change.generate([1, 5, 10], 18)
{:ok, [1, 1, 1, 5, 10]}
"""
@spec generate(list, integer) :: {:ok, list} | {:error, String.t}
def generate(coins, target) do
end
end
Version data entries
196 entries across 196 versions & 1 rubygems