-
-
Save BrentLee/22bc9689dd05c7100ffb3039d6d235f2 to your computer and use it in GitHub Desktop.
Popular Pizza Toppings
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| using System; | |
| using Newtonsoft.Json; | |
| using System.IO; | |
| using System.Net; | |
| using System.Collections.Generic; | |
| using System.Linq; | |
| public class Pizza | |
| { | |
| public List<string> toppings | |
| { | |
| get; | |
| set; | |
| } | |
| } | |
| public class ToppingCombination{ | |
| public string toppings; | |
| public int count; | |
| } | |
| public class Program | |
| { | |
| public void Main() | |
| { | |
| List<Pizza> pizzas = GetPizzas(); | |
| if(pizzas == null) return; | |
| IEnumerable<ToppingCombination> allToppingCombinations = GetToppingCombinations(pizzas); | |
| // top 20 most ordered combos | |
| int top = 20; | |
| IEnumerable<ToppingCombination> mostPopularToppings = allToppingCombinations.OrderByDescending(ag=>ag.count).Take(top); | |
| int i = 1; | |
| string str = "Rank: {0, 4} \t Times Ordered: {1, 5} \t Toppings: {2} "; | |
| foreach(ToppingCombination combo in mostPopularToppings){ | |
| Console.WriteLine(String.Format(str, i, combo.count, combo.toppings)); | |
| i++; | |
| } | |
| } | |
| // Returns list of pizzas | |
| List<Pizza> GetPizzas() | |
| { | |
| string url = "http://files.olo.com/pizzas.json"; | |
| HttpWebRequest httpWebRequest = System.Net.WebRequest.Create(url) as HttpWebRequest; | |
| List<Pizza> pizzas; | |
| using (HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse) | |
| { | |
| if (httpWebResponse.StatusCode != HttpStatusCode.OK) | |
| { | |
| throw new Exception(string.Format("Server error (HTTP {0}: {1}).", httpWebResponse.StatusCode, httpWebResponse.StatusDescription)); | |
| } | |
| Stream stream = httpWebResponse.GetResponseStream(); | |
| string json = new StreamReader(stream).ReadToEnd(); | |
| stream.Close(); | |
| // should add some error checking here | |
| pizzas = JsonConvert.DeserializeObject<List<Pizza>>(json); | |
| } | |
| return pizzas; | |
| } | |
| // Aggregates all topping combinations from list of pizzas | |
| // Returns each combination and count of each | |
| IEnumerable<ToppingCombination> GetToppingCombinations(List<Pizza> pizzas){ | |
| // Order toppings so we can group them | |
| var orderedPizzaToppings = pizzas.Select(p=>p.toppings.OrderBy(t=>t)); | |
| // Aggregate toppings list into a comma delimited string | |
| IEnumerable<string> aggregatedToppings = orderedPizzaToppings.Select((toppings => toppings.Aggregate((x,y) => x + "," + y))); | |
| // Group toppings and get counts of each | |
| IEnumerable<ToppingCombination> groupedToppings = aggregatedToppings | |
| .GroupBy(toppingsGroup=>toppingsGroup) | |
| .Select(toppingsGroup=>new ToppingCombination() | |
| { | |
| toppings = toppingsGroup.Key, | |
| count = toppingsGroup.Count() | |
| }); | |
| return groupedToppings; | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment