private static void UpdateChangeOption(ChangeOptionList possibleChangeOptions, int targetValue, int coin, ChangeOption existingChangeOption)
{
var newCoinList = CreateNewCoinList(coin, existingChangeOption);
if (!possibleChangeOptions.ChangeOptionExistsForTargetValue(targetValue))
{
possibleChangeOptions.AddChangeOption(targetValue, newCoinList);
}
else
{
possibleChangeOptions.GetChangeOption(targetValue).SetChangeCoins(newCoinList);
}
}
private static bool ExactChangeCanBeGiven(ChangeOptionList possibleChangeOptions, int target)
{
return(possibleChangeOptions.ChangeOptionExistsForTargetValue(target));
}
private static bool ExistingChangeOptionShouldBeUpdated(ChangeOptionList existingChangeOptions, int subtarget, ChangeOption newChangeOption)
{
return(newChangeOption != null &&
(!existingChangeOptions.ChangeOptionExistsForTargetValue(subtarget) || NewChangeOptionIsShorter(existingChangeOptions.GetChangeOption(subtarget), newChangeOption)));
}