docs.xsharp.it

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====== Sorting an object collection using a delegate ======
<code>class Person
constructor( cName as string )
self:Name := cName
return
public property Name as string auto
end class</code>

<code>local oPersons as List<Person>
oPersons := List<Person>{}
oPersons:Add( Person{ "Robert" } )
oPersons:Add( Person{ "Fabrice" } )
oPersons:Add( Person{ "Chris" } )
oPersons:Add( Person{ "Nikos" } )

oPersons:Sort( ;
  delegate( o1 as Person, o2 as Person ) {
    local nResult as int
    nResult := o1:Name:CompareTo( o2:Name )
    return nResult
    } ;
  )</code>
  
Attention: this code currently compiles only in Core dialect, not in VO dialect.
But there is a shorter form that compiles also in VO dialect:

<code>oPersons:Sort( {o1 AS Person, o2 AS Person => 
	LOCAL nResult AS INT
	nResult := o1:Name:CompareTo(o2:Name)
	RETURN nResult
	})</code>