F# Porting C# to F# POCOs
Example
Some of the simplest kinds of classes are POCOs.
// C#
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
public DateTime Birthday { get; set; }
}
In F# 3.0, auto-properties similar to C# auto-properties were introduced,
// F#
type Person() =
member val FirstName = "" with get, set
member val LastName = "" with get, set
member val BirthDay = System.DateTime.Today with get, set
Creation of an instance of either is similar,
// C#
var person = new Person { FirstName = "Bob", LastName = "Smith", Birthday = DateTime.Today };
// F#
let person = new Person(FirstName = "Bob", LastName = "Smith")
If you can use immutable values, a record type is much more idiomatic F#.
type Person = {
FirstName:string;
LastName:string;
Birthday:System.DateTime
}
And this record can be created:
let person = { FirstName = "Bob"; LastName = "Smith"; Birthday = System.DateTime.Today }
Records can also be created based on other records by specifiying the existing record and adding with, then a list of fields to override:
let formal = { person with FirstName = "Robert" }
