public static string[] WhoEatsWho(string zoo)
{
List <Animal> animals = new List <Animal>()
{
new Animal("antelope", new List <string> {
"grass"
}),
new Animal("bug", new List <string> {
"leaves"
}),
new Animal("bear", new List <string> {
"leaves", "big-fish", "bug", "chicken", "cow", "sheep"
}),
new Animal("chicken", new List <string> {
"bug"
}),
new Animal("cow", new List <string> {
"grass"
}),
new Animal("fox", new List <string> {
"chicken", "sheep"
}),
new Animal("giraffe", new List <string> {
"leaves"
}),
new Animal("lion", new List <string> {
"antelope", "cow"
}),
new Animal("panda", new List <string> {
"leaves"
}),
new Animal("sheep", new List <string> {
"grass"
}),
new Animal("big-fish", new List <string> {
"little-fish"
})
};
ZooLogger.Init(zoo);
List <string> thingsInZoo = zoo.Split(',').ToList();
int index = 0;
while (index < thingsInZoo.Count)
{
Animal animal = animals.Find(anim => anim.HasName(thingsInZoo.ElementAtOrDefault(index)));
index = animal?.EatNearby(ref thingsInZoo, index) ?? index + 1;
}
ZooLogger.Add(string.Join(",", thingsInZoo));
return(ZooLogger.GetAndFlush());
}
public int EatNearby(ref List <string> thingsInZoo, int animalIndex)
{
string leftThing = thingsInZoo.ElementAtOrDefault(animalIndex - 1);
string rightThing = thingsInZoo.ElementAtOrDefault(animalIndex + 1);
if (this.IsAbleToEat(leftThing))
{
ZooLogger.Eating(this.Name, leftThing);
thingsInZoo.RemoveAt(animalIndex - 1);
animalIndex -= 2;
}
else
{
while (this.IsAbleToEat(rightThing))
{
ZooLogger.Eating(this.Name, rightThing);
thingsInZoo.RemoveAt(animalIndex + 1);
rightThing = thingsInZoo.ElementAtOrDefault(animalIndex + 1);
}
animalIndex++;
}
return(animalIndex);
}