Haskell
24 posts

C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals, Chapter 1 of 13
Average: 4.75
(101)Welcome to a new technical series on Channel 9 folded into a different kind of 9 format: C9 Lectures. These are what you think they are, lectures. They are not conversational in nature (like most of what you're used to on 9), but rather these pieces are entirely focused on education, coming to you… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals, Chapter 2 of 13
Average: 4.75
(54)In Chapter 2, Dr. Meijer introduces Haskell syntax and notation (via a Haskell implementation called Hugs, to be precise, which is based on Haskell 98) and we learn about the Haskell syntax that represents the fundamental construct of functional programming:functions. It's not like you're used to in… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals Chapter 8 of 13
Average: 4
(14)In Chapter 8, Functional Parsers, it's all about parsing and parsers. A parser is a program that analyses a piece of text to determine its syntactic structure. In a functional language such as Haskell, parsers can naturallybe viewed as functions. type Parser = String > TreeA parser is a… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals, Chapter 3 of 13
Average: 5
(21)In Chapter 3, Dr. Meijer explores types and classes in Haskell. A type is a collection of related values and in Haskell every wellformed expression has a type. Using type inference, these types are automatically calculated at run time. Ifexpression e returns a type t, then e is of type t, e :: t. A… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals Chapter 7 of 13
Average: 5
(16)In Chapter 7, Dr. Meijer teaches us about HigherOrder Functions. A function is called higherorder if it takes a function as an argument and returns a function as a result:twice :: (a > a) > a > atwice f x = f (f x)The function twice above is higher order because it takes a function… 
C9 Lectures: Dr. Graham Hutton  Functional Programming Fundamentals Chapter 11 of 13
Average: 4
(13)Yes. You read the title correctly! For today's lecture in the Functional Programming Fundamentals series of lectures the great Dr. Graham Hutton, author of the Programming in Haskell book that Dr. Erik Meijer has based this lecture series on, is guest lecturing Chapter 11  The Countdown Problem!… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals Chapter 5 of 13
Average: 5
(23)In Chapter 5, Dr. Meijer introduces and digs into List Comprehensions. In mathematics, comprehension notation is used to construct new sets from old sets. In Haskell, you can create new lists from old lists using a similarcomprehension syntax:[x^2  x < [1..5]]The above notation represents the… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals Chapter 6 of 13
Average: 5
(17)In Chapter 6, Dr. Meijer guides us through the world of recursive functions. In Haskell, functions can be defined in terms of themselves. Such functions are called recursive. For example: factorial 0 = 1factorial (n+1) = (n+1) * factorial nfactorial maps 0 to 1, and any other positive… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals Chapter 10 of 13
Average: 4
(13)In Chapter 10, Declaring Types and Classes, Dr. Meijer teaches us about type declarations, data declarations, arithmetic expressions, etc. In Haskell, a new name for an existing type can be defined using atype declaration:type String = [Char]String is a synonym for the type [Char].Like function… 
C9 Lectures: Dr. Erik Meijer  Functional Programming Fundamentals Chapter 9 of 13
Average: 5
(12)In Chapter 9, Interactive Programs, Dr. Meijer will teach us how to make programs in Haskell that are sideeffecting:interactive. Haskell programs are pure mathematical functions with no side effects. That said, you want to be able to write Haskell programs that can read input from the keyboard and…