CSE 230
Tony Hoare
Turing Award Lecture 1980
Programming
Languages
There are two ways of constructing software.
One way is to make it so simple,
that there are obviously no deficiencies,
The other way is to make it so complicated
that there are no obvious
7
Higher-order functions
In this chapter we introduce higher-order functions, which allow common programming patterns to be
encapsulated as functions. We start by explaining what higher-order functions are and why they are useful,
then intro
12
Monads and more
In this chapter we increase the level of generality that can be achieved in Haskell, by considering
functions that are generic over a range of parameterised types such as lists, trees and input/output actions.
In particu
13
Monadic parsing
In this chapter we illustrate how monads can be used to implement parsers. We start by explaining what
parsers are and why they are useful, show how parsers can naturally be viewed as functions, introduce a
range of primitives and deriv
Introduction to the -Calculus
Part II
CS209 - Functional Programming
Dr. Greg Lavender
Department of Computer Science
Stanford University
iszero Predicate
Test for zero
5/24/09
iszero = n.n(x.F)T
iszero 0 = (n.n(x.F)T) sz.z
=> (sz.z) (x.F)T
=> T
iszero S0
CSE 230: Medium of Instruction
Haskell
What is Haskell?
Programming in Haskell
Programming in Haskell
Computation by Calculation
Substitute Equals by Equals
Substituting Equals
3 * (4 + 5)
What is Abstraction?
Pattern Recognition
3 * 9
27
Thats it!
Patter
Background
CSE 230
The -Calculus
Developed in 1930s by Alonzo Church
Studied in logic and computer science
Test bed for procedural and functional PLs
Simple, Powerful, Extensible
Whatever the next 700 languages turn out to be,
they will surely be variants
Part 3: An Interpreter for WHILE
=
\begincfw_code
cfw_-@ LIQUID "-no-termination" @-
module Interpreter (interpret) where
import
Prelude hiding (lookup)
import qualified Data.Set as S
\endcfw_code
*HINT:* To do this problem, first go through [this case st