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
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
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
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
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