When are predicates appropriate and what is the best pattern for usage
- by Maxim Gershkovich
When are predicates appropriate and what is the best pattern for usage? What are the advantages of predicates?
It seems to me like most cases where a predicate can be employed a tight loop would accomplish the same functionality?
I don’t see a reusability argument given you will probably only implement a predicate in one method right?
They look and feel nice but besides that they seem like you would only employ them when you need a quick hack on the collection classes?
UPDATE
But why would you be rewriting the tight loop again and again?
In my mind/code when it comes to collections I always end up with something like
Class Person
End Class
Class PersonList
Inherits List(Of Person)
Function FindByName(Name) as Person
tight loop....
End Function
End Class
@Ani
By that same logic I could implement the method as such
Class PersonList
Inherits List(Of Person)
Function FindByName(Name) as PersonList
End Function
Function FindByAge(Age) as PersonList
End Function
Function FindBySocialSecurityNumber(SocialSecurityNumber) as PersonList
End Function
End Class
And call it as such
Dim res as PersonList = MyList.FindByName("Max").FindByAge(25).FindBySocialSecurityNumber(1234)
and the result along with the amount of code and its reusability is largely the same, no?
I am not arguing just trying to understand.
