public void FebNumTest()
{
FibNums test3 = new FibNums();
Assert.AreEqual(test3[3], 2, "Incorrect Calculation");
}
public void AtZero()
{
FibNums test1 = new FibNums();
long result = test1[0];
}
public void NegativeNumber()
{
FibNums test2 = new FibNums();
long result = test2[-1];
}
static void Main(string[] args)
{
Console.OutputEncoding = System.Text.Encoding.UTF8;
//lunchtime challenge 3 https://markheath.net/post/linq-challenge-3
//1 Longest Sequence
var longest = "1,2,1,1,0,3,1,0,0,2,4,1,0,0,0,0,2,1,0,3,1,0,0,0,6,1,3,0,0,0"
.Split(',')
.Aggregate(seed: new { localcount = 0, globallongest = 0 },
func: (prev, ch) =>
{
int localcount = ch == "0" ? prev.localcount + 1 : 0;
int globallongest = localcount > prev.globallongest ?
localcount : prev.globallongest;
return(new { localcount, globallongest });
},
resultSelector: x => x.globallongest);
Console.WriteLine(longest);
//2 Full House
"4♣ 5♦ 6♦ 7♠ 10♥;10♣ Q♥ 10♠ Q♠ 10♦;6♣ 6♥ 6♠ A♠ 6♦;2♣ 3♥ 3♠ 2♠ 2♦;2♣ 3♣ 4♣ 5♠ 6♠"
.Split(';')
.Select(x => x.Split(' '))
.Select(hand => (hand, hand.GroupBy(card => card.TrimEnd('♣', '♦', '♠', '♥'),
card => card,
(value, group) => new { Key = value, Count = group.Count() }
)))
//.Where(g => g.Item2.Count() == 2)
.Where(g => g.Item2.Any(x => x.Count == 3))
.Where(g => g.Item2.Any(x => x.Count == 2))
.Select(g => String.Join(" ", g.Item1))
.ToList().ForEach(Console.WriteLine);
//3 Christmas Days
Console.WriteLine(String.Join(",", Enumerable.Range(2018, 10).Select(x => new DateTime(x, 12, 25).DayOfWeek)));
//4 Anagrams
"parts,traps,arts,rats,starts,tarts,rat,art,tar,tars,stars,stray"
.Split(',')
.Select(x => (x, x.Aggregate(new int[26], (prev, ch) => { prev[ch - 'a']++; return(prev); })))
.Where(p => p.Item2.SequenceEqual("star".Aggregate(new int[26], (prev, ch) => { prev[ch - 'a']++; return(prev); })))
.ToList().ForEach(p => Console.WriteLine(p.Item1));
Console.WriteLine("Alternative way");
"parts,traps,arts,rats,starts,tarts,rat,art,tar,tars,stars,stray"
.Split(',')
.Where(w => w.Length == "star".Length &&
String.Join("", w.OrderBy(c => c)).Contains(String.Join("", "star".OrderBy(c => c))))
.ToList().ForEach(Console.WriteLine);
//5 Initial Letters
var sameinigp = "Santi Cazorla, Per Mertesacker, Alan Smith, Thierry Henry, Alex Song, Paul Merson, Alexis Sánchez, Robert Pires, Dennis Bergkamp, Sol Campbell"
.Split(',')
.GroupBy(x => new string(x.Trim().Split(' ').Select(n => n[0]).ToArray()), x => x.Trim());
sameinigp.ToList().ForEach(x => { Console.WriteLine($"initial:{x.Key}");
x.ToList().ForEach(Console.WriteLine); });
//6
Console.WriteLine(String.Join(";", ("0:00:00-0:00:05;0:55:12-1:05:02;1:37:47-1:37:51"
.Replace("-", "*")
.Replace(";", "-") + "-2:00:00")
.Split('*')
.Skip(1)
));
var fibs = new FibNums();
Console.WriteLine(fibs.AllFibs().ElementAt(100));
var L1 = Enumerable.Range(0, 10);
var L2 = Enumerable.Range(10, 10);
//sum L1 with Sum()
Console.WriteLine(L1.Sum());
//sum L1 with Aggregate
Console.WriteLine(L1.Aggregate((x, y) => x + y));
//Print every element of L2 w/ ForEach linq
L2.ToList().ForEach(Console.WriteLine);
//Multiply every element in L2 by 2
var L3 = L2.Select(x => x * 2);
L3.ToList().ForEach(Console.WriteLine);
//Sum L1 + L2 element by element, force the resulting list, find tis product and print the result
Console.WriteLine(L1.Zip(L2, (x, y) => x + y).ToList().Select(x => (long)x).Aggregate((x, y) => x * y));
//1
var str1 = "Davis, Clyne, Fonte, Hooiveld, Shaw, Davis, Schneiderlin, Cork, Lallana, Rodriguez, Lambert";
str1.Split(',').Select((x, index) => (index + 1).ToString() + ". " + x.Trim())
.ToList().ForEach(Console.WriteLine);
//2
string str2 = "Jason Puncheon, 26/06/1986; Jos Hooiveld, 22/04/1983; Kelvin Davis, 29/09/1976; Luke Shaw, 12/07/1995; Gaston Ramirez, 02/12/1990; Adam Lallana, 10/05/1988";
str2.Split(';')
.Select(x => x.Split(','))
.Select(x => new { Name = x[0].Trim(), Birthday = DateTime.ParseExact(x[1].Trim(), "dd/MM/yyyy", CultureInfo.InvariantCulture) })
.OrderBy(x => x.Birthday)
.ToList()
.ForEach(x => Console.WriteLine($"{x.Name} is {(int)((DateTime.Now-x.Birthday.Date).Days/365.25)} years old."));
//3
string str3 = "4:12,2:43,3:51,4:29,3:24,3:14,4:46,3:25,4:52,3:27";
Console.WriteLine(
str3.Split(',')
.Select(x => TimeSpan.ParseExact(x, @"m\:ss", CultureInfo.InvariantCulture))
//.Select(x => x.Split(':'))
//.Select(x => new TimeSpan(0, int.Parse(x[0]), int.Parse(x[1])))
.Aggregate((x, y) => x.Add(y))
.ToString()
);
//4
Console.WriteLine("ex4");
Enumerable.Repeat(Enumerable.Range(0, 3).Select(x => "," + x.ToString()), 3)
.SelectMany(x => x)
.Select((x, index) => (index / 3).ToString() + x)
.ToList().ForEach(Console.WriteLine);
Console.WriteLine("ex4 alternative");
Enumerable.Range(0, 9).Select(x => (x / 3).ToString() + "," + (x % 3).ToString())
.ToList().ForEach(Console.WriteLine);
//5
string str5 = "00:45,01:32,02:18,03:01,03:44,04:31,05:19,06:01,06:47,07:35";
("00:00," + str5).Split(',')
.Select(x => TimeSpan.ParseExact(x, @"mm\:ss", CultureInfo.InvariantCulture))
.Zip(str5.Split(',')
.Select(x => TimeSpan.ParseExact(x, @"mm\:ss", CultureInfo.InvariantCulture)),
(prev, cur) => cur - prev)
.ToList().ForEach(x => Console.WriteLine(x));
//6
string str6 = "2,5,7-10,11,17-18";
str6.Split(',')
.Select(x => x.Split('-'))
.Select(x => Enumerable.Range(int.Parse(x[0]), int.Parse(x.Last()) - int.Parse(x[0]) + 1))
.SelectMany(x => x)
.ToList().ForEach(Console.WriteLine);
int[] arr = new int[] { 1, 3, 2, 5, 4, 7, 10 };
Parity(arr);
arr.ToList().ForEach(Console.WriteLine);
int[] arr2 = new int[] { 9, 8, 13, 2, 19, 14 };
Parity(arr2);
arr2.ToList().ForEach(Console.WriteLine);
Console.WriteLine();
// https://markheath.net/post/lunchtime-linq-challenge-2
//1
Console.WriteLine("10,5,0,8,10,1,4,0,10,1"
.Split(',').Select(int.Parse)
.OrderBy(x => x)
.Skip(3)
.Sum());
//2
BishopMove("c6").ToList().ForEach(Console.WriteLine);
//3
"0,6,12,18,24,30,36,42,48,53,58,63,68,72,77,80,84,87,90,92,95,96,98,99,99,100,99,99,98,96,95,92,90,87,84,80,77,72,68,63,58,53,48,42,36,30,24,18,12,6,0,-6,-12,-18,-24,-30,-36,-42,-48,-53,-58,-63,-68,-72,-77,-80,-84,-87,-90,-92,-95,-96,-98,-99,-99,-100,-99,-99,-98,-96,-95,-92,-90,-87,-84,-80,-77,-72,-68,-63,-58,-53,-48,-42,-36,-30,-24,-18,-12,-6"
.Split(',').Where((x, index) => index % 5 == 4)
.ToList().ForEach(Console.WriteLine);
//4 vote winning margin
Console.WriteLine("Yes,Yes,No,Yes,No,Yes,No,No,No,Yes,Yes,Yes,Yes,No,Yes,No,No,Yes,Yes"
.Split(',')
.Aggregate(seed: 0, func: (prev, vote) => vote == "Yes" ? prev + 1 : prev - 1)
);
//5 counting pets
Console.WriteLine("Dog,Cat,Rabbit,Dog,Dog,Lizard,Cat,Cat,Dog,Rabbit,Guinea Pig,Dog"
.Split(',')
.Aggregate(seed: new { Dog = 0, Cat = 0, Other = 0 },
func: (prev, animal) => new { Dog = prev.Dog + (animal == "Dog"?1:0), Cat = prev.Cat + (animal == "Cat"?1:0), Other = prev.Other + (animal != "Dog" && animal != "Cat"?1:0) },
resultSelector: x => $"Dog:{x.Dog} Cat:{x.Cat} Other:{x.Other}")
);
//6 – Run Length Decoding
Console.WriteLine(DecodeRunLength("A5B10CD3"));
Console.WriteLine(DecodeRunLength2("A5B10CD3"));
Console.WriteLine(DecodeRunLength3("A5B11CD3"));
Console.WriteLine(RunDecoder("AB11CD3"));
Regex.Split("AB11CD3", "([A-Z])").ToList().ForEach(Console.WriteLine);
Console.WriteLine(ShortestPathBinaryMatrix(new int[][] { new int[] { 0 } }));
}
