public static Option <Age> Of(int age) => new Some <Age>(Age.Create(age));
static void FunctionalProgrammingExamples()
{
try {
var book = BookStore.Models.Book.Create(null, DateTime.Now);
Write($"{book.Name} was published in {book.PublishDate.ToString()}");
} catch (ArgumentNullException nullError) {
WriteLine(nullError.Message);
}
"".ToTime(() => {
var age1 = Age.Create(12);
var age2 = Age.Create(23);
WriteLine($"{age1}>{age2}");
WriteLine($"{age2} >14");
return(Unit.Create());
});
getMessage();
string getMessage()
{
return("hello");
}
try {
var r = TestOption().Match(
(name) => $"Greetings from {name}",
() =>
throw new System.NullReferenceException("REPLY IS NULL OK")
);
WriteLine("r:" + r);
} catch (Exception e) {
WriteLine(e.Message);
}
try {
// Parse value example
WriteLine("232".Parse().Match((i) => i, () => 0));
// Parse example with throw exception
WriteLine("45".Parse().Match(i => i, () =>
throw new InvalidCastException("fail to type cast ...")));
// Map example
// foreach (var item in new [] { "One", "Two", "Three", "Double Fees" }.Map(x => $"{x} has {x.Length} characters.")) {
// WriteLine(item);
// }
} catch (Exception err) {
WriteLine(err.Message);
}
// Map example
var listOfOptions = new List <Option <string> >();
listOfOptions.Add(None.Instance);
listOfOptions.Add(new Some <string>("Good boy 1"));
listOfOptions.Add(None.Instance);
listOfOptions.Add(new Some <string>("Good boy 2"));
listOfOptions.Add(None.Instance);
listOfOptions.Add(new Some <string>("Good boy 3"));
foreach (var item in listOfOptions.Map(y => y.Content.Replace(" ", "___")))
{
WriteLine(item);
}
}