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Compiling Purely Functional Structured Programs
Compiling Purely Functional Structured Programs

... depending on whether we evaluate the outer application right-to-left or left-to-right. Compilation of functional programs via CPS transformation was the basis for the classic text Compiling with Continuations [2], but the approach has notoriously fallen out of favour. Compiler toolchains such as LLV ...
Abstract Interpretation - Dipartimento di Informatica
Abstract Interpretation - Dipartimento di Informatica

... – C has the structure of a powerset abstract domain (A, ) – each abstract value is a description of “a set of” concrete values ...
Lambda the Ultimate - Rice University Campus Wiki
Lambda the Ultimate - Rice University Campus Wiki

... that the rule uses safe substitution, where safe substitution renames local variables in the code body that is being modified by the substitution to avoid capturing free variables in the argument expression that is being ...
Downloadable PowerPoint file
Downloadable PowerPoint file

Pretty Printing with Lazy Dequeues
Pretty Printing with Lazy Dequeues

User`s Functions in Standard Prolog
User`s Functions in Standard Prolog

... point. If fib(K) is to be evaluated, and K\=1, and K\=0, no choice point is generated, because first argument indexing rules out the second and the third pln clauses.) When the narrowing step above has been performed, expressionθϕ is usually evaluated further, because expression is a pln expression, ...
Slides
Slides

Implementing a non-strict purely functional language in JavaScript
Implementing a non-strict purely functional language in JavaScript

... To emulate Sapl’s non-strict evaluation semantics for function applications, we represented unevaluated expressions (thunks) as arrays in JavaScript. Because JavaScript treats these arrays as primitive values, some way is needed to explicitly reduce thunks to normal form when their value is required ...
CM20167 Topic 6: Some sorting algorithms
CM20167 Topic 6: Some sorting algorithms

... Quicksort really begins to win over mergesort when it’s implemented using in-place array update rather than our recursive, list-based version. Comparisons are not the only key operation in sorting: creating the new list or array is costly too. Quicksort beats mergesort hands down on this front. ...
A Representation Theorem for Second-Order Functionals
A Representation Theorem for Second-Order Functionals

Functional programming languages - Part I - Gallium
Functional programming languages - Part I - Gallium

... Elementary reductions can be chained to describe how a term evaluates: Termination: a → a1 → a2 → . . . → v The value v is the result of evaluating a. Divergence: a → a1 → a2 → . . . → an → . . . The sequence of reductions is infinite. Error: a → a1 → a2 → . . . → an 6→ when an is not a value but do ...
Scala - Dave Reed
Scala - Dave Reed

... println(xs) println(sort(xs))}} ...
Functional vs Imperative Programs
Functional vs Imperative Programs

... −−Algebraic laws ◊ Reason about programs ◊ Optimizing compilers ...
Semantics Directed Program Execution Monitoring
Semantics Directed Program Execution Monitoring

Programming Language Theory and its Implementation
Programming Language Theory and its Implementation

lec4
lec4

... E1, E2,...,En - E1 should evaluate to a function and then apply the function value of E1 to the arguments given by the values of E2,...,En. In the base case, there are self evaluating expressions (e.g. numbers and symbols). In addition, various special forms such as quote and if must be handled sep ...
COS220lec52_FP
COS220lec52_FP

... Introduction to FP Imperative programming vs. functional programming Language applied to functional programming is LISP – LISt Programming. It was invented to provide language features for list processing, the need for which grew out of the first application in the area of AI, expert systems, knowl ...
Python - ACE home page
Python - ACE home page

... Lambda expressions (sometimes called lambda forms) have the same syntactic position as expressions. They are a shorthand to create anonymous functions; the expression "lambda arguments: expression” yields a function object. The unnamed object behaves like a function object defined with def ( ...
PPT
PPT

... Verification (Primitive list reverse) ...
Verification of a Cryptographic Primitive: SHA-256 ANDREW W. APPEL
Verification of a Cryptographic Primitive: SHA-256 ANDREW W. APPEL

funprog
funprog

A Second Edition: Verification of a Cryptographic Primitive: SHA-256 ANDREW W. APPEL
A Second Edition: Verification of a Cryptographic Primitive: SHA-256 ANDREW W. APPEL

Imperative languages
Imperative languages

... Loops – while-do • Repeat a block of commands while (or until) a condition is satisfied – Loop body changes the state of program ...
Lambda
Lambda

View
View

... The syntax for accessing the elements of a list is the same as the syntax for accessing the characters of a string--the bracket operator ([ ]). The expression inside the brackets specifies the index. Remember that the indices start at 0: print numbers[0] numbers[1] = 5 The bracket operator can appea ...
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Standard ML

Standard ML (SML) is a general-purpose, modular, functional programming language with compile-time type checking and type inference. It is popular among compiler writers and programming language researchers, as well as in the development of theorem provers.SML is a modern descendant of the ML programming language used in the Logic for Computable Functions (LCF) theorem-proving project. It is distinctive among widely used languages in that it has a formal specification, given as typing rules and operational semantics in The Definition of Standard ML (1990, revised and simplified as The Definition of Standard ML (Revised) in 1997).
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