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linguist/samples/Golo/coin-change.golo
2014-09-17 13:59:02 +02:00

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# Copyright 2012-2014 Institut National des Sciences Appliquées de Lyon (INSA-Lyon)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module CoinChange
import java.util.LinkedList
function change = |money, coins| -> match {
when money == 0 then 1
when (money < 0) or (coins: isEmpty()) then 0
otherwise change(money - coins: head(), coins) + change(money, coins: tail())
}
function main = |args| {
let coins = LinkedList(): append(1, 2, 5, 10, 20)
println("Coins: " + coins)
println("0: " + change(0, coins))
println("1: " + change(1, coins))
println("2: " + change(2, coins))
println("10: " + change(10, coins))
println("12: " + change(12, coins))
println("6: " + change(6, coins))
}