public static AutoOptionEntry[] AutoOptionEntries()
{
AutoOptionEntry[] autoOptions = new AutoOptionEntry[] {
new AutoOptionEntry {
id = 1,
optionsCount = 2,
dateOfManufacture = DateTime.Parse("1999/12/31")
},
new AutoOptionEntry {
id = 2,
optionsCount = 10000,
dateOfManufacture = DateTime.Parse("1992/06/30")
},
new AutoOptionEntry {
id = 2,
optionsCount = 10000,
dateOfManufacture = DateTime.Parse("1994/01/01")
},
new AutoOptionEntry {
id = 3,
optionsCount = 5000,
dateOfManufacture = DateTime.Parse("1997/09/30")
},
new AutoOptionEntry {
id = 2,
optionsCount = 10000,
dateOfManufacture = DateTime.Parse("2003/04/01")
},
new AutoOptionEntry {
id = 3,
optionsCount = 7500,
dateOfManufacture = DateTime.Parse("1998/09/30")
},
new AutoOptionEntry {
id = 3,
optionsCount = 7500,
dateOfManufacture = DateTime.Parse("1998/09/30")
},
new AutoOptionEntry {
id = 4,
optionsCount = 1500,
dateOfManufacture = DateTime.Parse("1997/12/31")
},
new AutoOptionEntry {
id = 101,
optionsCount = 2,
dateOfManufacture = DateTime.Parse("1998/12/31")
}
};
return(autoOptions);
}
public static void Main(string[] args)
{
//IEnumerable<string> someCars = LinqToArray.favouriteCars.Where(n => n.Contains("7")).OrderBy(n => n);//.Select(n => n);
//Console.WriteLine("*******first array\n");
//foreach (var item in someCars)
//{
// Console.WriteLine(item);
//}
LinqToArray.favouriteCars[0] = "Volvo";
IEnumerable <string> newSomeCar = LinqToArray.favouriteCars.Where(item => item.Contains(".") && item.Contains("")).
Where(item => item.Contains(".") && item.Contains("")).OrderBy(item => item).Select(item => item);
//from item in LinqToArray.favouriteCars where item.Contains(".")
//where item.Contains("") orderby item select item;
Console.WriteLine("\n*******Array after change\n");
foreach (var item in newSomeCar)
{
Console.WriteLine(item);
}
int[] random = { 10, 26, 94, 88, 43, 26, 10, 31, 65, 43 };
int[] selectedItem = (random.Where(ran => (ran > 3 && ran < 10)).OrderBy(ran => ran).Select(ran => ran)).ToArray();
//int[] selectedItem = (from ran in random where ran > 3 && ran < 10 orderby ran select ran).ToArray();
Console.WriteLine("*********ARRAY");
foreach (var item in selectedItem)
{
Console.WriteLine(item);
}
List <int> listItems = (random.Where(ran => ran > 5).OrderBy(ran => ran).Select(ran => ran)).ToList();
//List<int> listItems = (from ran in random where ran > 5 orderby ran select ran).ToList();
Console.WriteLine("********LIST");
foreach (var item in listItems)
{
Console.WriteLine(item);
}
var selectedPeople = LinqToArray.people.Where(p => p.Age > 10 && p.Age < 40).Select(p => new { p.Name, p.Age });
Console.WriteLine("=========================Take-TakeWhile;Skip-SkipWhile===========================");
var selectedTakeItem = random.Where(ran => ran > 0).Take(5).OrderBy(ran => ran).Select(ran => ran);
foreach (var item in selectedTakeItem)
{
Console.WriteLine(item);
}
Console.WriteLine("\n");
var selectedSkipItem = random.Skip(5).Select(ran => ran);
foreach (var item in selectedSkipItem)
{
Console.WriteLine(item);
}
Console.WriteLine("\n ========================= Skip");
// var selectedSkipItems = random.SkipWhile((i,q) => i>1 && q.); DO NOT WORK!!!!!!!!!!!!!!!!
int[] arrInt = { 5, 34, 67, 3, 87, 90, 102 };
Console.WriteLine("\n ========================= Concat");
//var selectedConcat = random.Concat(arrInt);
IEnumerable <int> selectedConcat = new[] { random.Where(a => a > 50), arrInt.Skip(5) }.SelectMany(ran => ran);
foreach (var item in selectedConcat)
{
Console.WriteLine(item);
}
Console.WriteLine("\n ========================= OrderByDescending");
var selectOrderBy = arrInt.Where(h => h > 20).Take(6).OrderByDescending(h => h);
foreach (var item in selectOrderBy)
{
Console.WriteLine(item);
}
Console.WriteLine("\n ========================= Then");
IEnumerable <string> newSoCar = LinqToArray.favouriteCars.OrderBy(s => s).ThenBy(s => s); // N1
foreach (var item in newSoCar)
{
Console.WriteLine(item);
}
Console.WriteLine("\n");
IEnumerable <string> newSoCar2 = LinqToArray.favouriteCars.OrderBy(s => s).ThenByDescending(s => s); // N2 what's the difference beetwen N1 & N2 ????
foreach (var item in newSoCar2)
{
Console.WriteLine(item);
}
Console.WriteLine("\n========================= Join/GroupJoin");
var automob = Automobile.GetAutoArrayList();
AutoOptionEntry[] autoOpt = AutoOptionEntry.AutoOptionEntries();
//var automobileOpt = automob.Join( //ArrayList do not contain Join
// autoOpt,
// s => s.id,
// d => d.id,
// (s, d) => new
// {
// id = s.id,
// mod = string.Format("{0}{1}", s.model, s.countryMake),
// options = d.optionsCount
// });
//foreach (var item in automobileOpt)
//{
// Console.WriteLine(item);
//}
Console.WriteLine("\n========================= Distinct, Union, Except и Intersect");
foreach (var item in random)
{
Console.Write("\t" + item);
}
var selectDistinct = random.Distinct();
Console.WriteLine();
foreach (var item in selectDistinct)
{
Console.Write("\t" + item);
}
Console.WriteLine("\n");
var first = random.Take(5);
var second = random.Skip(4);
var concat = first.Concat(second);
var union = first.Union(second);
Console.WriteLine(@"array Random:{0}
first - {1}
second - {2}
concat - {3}
union - {4}", random.Count(), first.Count(), second.Count(), concat.Count(), union.Count());
Console.WriteLine("\n");
var selectIntersect = first.Intersect(second);
foreach (var item in first)
{
Console.Write("\t" + item);
}
Console.WriteLine();
foreach (var item in second)
{
Console.Write("\t" + item);
}
Console.WriteLine();
foreach (var item in selectIntersect)
{
Console.WriteLine(item);
}
Console.WriteLine();
var selectExcept = first.Except(second);
foreach (var item in selectExcept)
{
Console.WriteLine(item);
}
Console.WriteLine("\n========================= Cast/ ofType");
ArrayList list = new ArrayList();
list.Add(new Automobile {
id = 1, model = "vaz2108", countryMake = "Russia"
});
list.Add(new Automobile {
id = 2, model = "Subaru", countryMake = "Japan"
});
list.Add(new AutoOptionEntry {
id = 1, optionsCount = 100
});
list.Add(new Automobile {
id = 3, model = "BMW", countryMake = "Germany"
});
var items = list.Cast <Automobile>();
Console.WriteLine("use Cast");
try
{
foreach (var item in items)
{
Console.WriteLine("{0}{1}{2}", item.id, item.model, item.countryMake);
}
}
catch (Exception ex)
{
Console.WriteLine("{0}{1}", ex.Message, System.Environment.NewLine);
}
Console.WriteLine("use OfType");
var items2 = list.OfType <Automobile>();
foreach (var item in items2)
{
Console.WriteLine("{0} {1} {2}", item.id, item.model, item.countryMake);
}
Console.WriteLine("\n========================= DefaultIfEmpty");
try
{
string subary = LinqToArray.favouriteCars.Where(n => n.Equals("subary")).DefaultIfEmpty().First();
if (subary != null)
{
Console.WriteLine("car found");
}
Console.WriteLine("car not found");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("\n========================= Range, Repeat и Empty");
IEnumerable <int> strs = Enumerable.Range(1, 10);
foreach (var item in strs)
{
Console.WriteLine(item);
}
Console.WriteLine("---");
IEnumerable <int> repets = Enumerable.Repeat(1, 3);
foreach (var item in repets)
{
Console.WriteLine(item);
}
Console.WriteLine("---");
IEnumerable <string> str = Enumerable.Empty <string>();
foreach (string s in str)
{
Console.Write(s);
}
Console.WriteLine(str.Count());
}
