The Manchester Lambda Lounge

Lambda Lounge

Title: The Manchester Lambda Lounge
Location: MadLab
Description: A group dedicated to popularising Functional Programming, and exploring new concepts in programming languages.
Date: 13-08-2012
Start Time: 19:00
End Time: 21:00





The Manchester Lambda Lounge’s next talk will see Ian Murray putting
the func in Functors, by introducing us to Applicative Functors as
they are used in Haskell.

Applicative functors are an abstraction that sit between functors and
monads: weaker (hence more widely occurring) than monads, and stronger
than functors.

This practical talk will be split into two parts:

1. An introduction to the definition of the Applicative type class.
Will show some examples of Applicative instances to get a feel for it.
And then discuss how it’s used; and how it achieves what a Functor

2. Will look at the applicative-style of programming in Haskell, using
user input validation as an example of this (including a brief detour
to introduce the Monoid type class).