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Chapter 1 - eLisa UGM
Chapter 1 - eLisa UGM

... conditional expressions, recursion, and functional forms to control program execution instead of imperative features such as variables and assignments • LISP began as a purely functional language and later included imperative features • Scheme is a relatively simple dialect of LISP that uses static ...
Chapter 1
Chapter 1

... conditional expressions, recursion, and functional forms to control program execution instead of imperative features such as variables and assignments • LISP began as a purely functional language and later included imperative features • Scheme is a relatively simple dialect of LISP that uses static ...
pl9ch15 - Systems and Computer Engineering
pl9ch15 - Systems and Computer Engineering

... conditional expressions, recursion, and functional forms to control program execution instead of imperative features such as variables and assignments • LISP began as a purely functional language and later included imperative features • Scheme is a relatively simple dialect of LISP that uses static ...
Chapter 15 Slides - SRU Computer Science
Chapter 15 Slides - SRU Computer Science

... conditional expressions, recursion, and functional forms to control program execution instead of imperative features such as variables and assignments • LISP began as a purely functional language and later included imperative features • Scheme is a relatively simple dialect of LISP that uses static ...
Closure and Environment
Closure and Environment

... A closure is a data structure to represent a function at runtime A closure is essentially a heap-allocated struct/tuple containing a code pointer, as well as a (L-)values for the function’s free variables (environment) The process of converting a function to a closure is called closure conversion ...
fp_in_scheme
fp_in_scheme

... • apply takes a function & a list of arguments for it & returns the result of applying the function to them > (apply + ' (1 2 3)) ...
Functional Programming
Functional Programming

... conditional expressions, recursion, and functional forms to control program execution instead of imperative features such as variables and assignments • LISP began as a purely functional language and later included imperative features • Scheme is a relatively simple dialect of LISP that uses static ...
Document
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... CS321 Functional Programming 2 ...
Chapter 15 - McMaster Computing and Software
Chapter 15 - McMaster Computing and Software

... • The objective of the design of a FPL is to mimic mathematical functions to the greatest extent possible • The basic process of computation is fundamentally different in a FPL than in an imperative language – IIn an iimperative i llanguage, operations i are d ...
Chapter 15 slides - Erica Heitman-Ford
Chapter 15 slides - Erica Heitman-Ford

pl10ch15
pl10ch15

... function definitions. Function applications and data have the same form. e.g., If the list (A B C) is interpreted as data it is a simple list of three atoms, A, B, and C If it is interpreted as a function application, it means that the function named A is applied to the two parameters, B and C • The ...
Short Introduction to the Lambda
Short Introduction to the Lambda

... http://www.dmi.unict.it/~barba/LinguaggiII.html/READING_MATERIAL/LAMBDACALCULUS/LAMBDACALCULUS.1.HTM ...
PROGRAMMING LANGUAGES 6.5 Higher Order Functions A
PROGRAMMING LANGUAGES 6.5 Higher Order Functions A

... PROGRAMMING LANGUAGES Mathematically, a function is a single-valued mapping: it associates every element in one set (the domain) with (at most) one element in another set (the range). In conventional notation, we indicate the domain and range of, say, the square root function by writing ...
Appendix B FUNCTIONAL PROGRAMMING WITH SCHEME
Appendix B FUNCTIONAL PROGRAMMING WITH SCHEME

... The functional programming paradigm provides an alternative notion of programming that avoids the problems of side effects. Functional languages are concerned with data objects and values instead of variables. Values are bound to identifiers, but once made, these bindings cannot change. The principa ...
Ch15-w
Ch15-w

... conditional expressions, recursion, and functional forms to control program execution instead of imperative features such as variables and assignments • LISP began as a purely functional language and later included imperative features • Scheme is a relatively simple dialect of LISP that uses static ...
Theorems for free! - Computing Science
Theorems for free! - Computing Science

Maclennan-chap9-Lisp.ppt
Maclennan-chap9-Lisp.ppt

Lisp and Scheme I
Lisp and Scheme I

type - ktuce
type - ktuce

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Chapter 1 - KSU Web Home
Chapter 1 - KSU Web Home

... Copyright © 2009 Addison-Wesley. All rights reserved. ...
Untyped Lambda Calculus - Programming Systems Lab
Untyped Lambda Calculus - Programming Systems Lab

... and return functions as results. No other objects are needed since data objects like numbers and pairs can be represented as functions in the untyped lambda calculus. Untyped lambda calculus is a model of computation that appeared before Turing machines. Turing himself showed that computability form ...
Chapter 15 Functional Programming Languages
Chapter 15 Functional Programming Languages

... - A static-scoped functional language with syntax that is closer to Pascal than to LISP - Uses type declarations, but also does type inferencing to determine the types of undeclared variables, we’ll see this in our ML studies - It is strongly typed (whereas Scheme is essentially typeless) and has no ...
Chapter 15 Functional Programming Languages
Chapter 15 Functional Programming Languages

... - A static-scoped functional language with syntax that is closer to Pascal than to LISP - Uses type declarations, but also does type inferencing to determine the types of undeclared variables, we’ll see this in our ML studies - It is strongly typed (whereas Scheme is essentially typeless) and has no ...
A general introduction to Functional Programming using Haskell
A general introduction to Functional Programming using Haskell

... A lambda expression is used to define an anonymous function It is made of: – a pattern for each argument of the function – a body, which defines how the result is computed from the values of the arguments – Examples: \x ­> x+x \(x,y) ­> x+y \(x:xs) ­> x^2 • then, if we evaluate the expression (\(x:x ...
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Closure (computer programming)

In programming languages, closures (also lexical closures or function closures) are a technique for implementing lexically scoped name binding in languages with first-class functions. Operationally, a closure is a record storing a function together with an environment: a mapping associating each free variable of the function (variables that are used locally, but defined in an enclosing scope) with the value or storage location to which the name was bound when the closure was created. A closure—unlike a plain function—allows the function to access those captured variables through the closure's reference to them, even when the function is invoked outside their scope.Example. The following program fragment defines a higher-order function startAt with a parameter x and a nested function incrementBy. The nested function incrementBy has access to x, because incrementBy is in the lexical scope of x, even though x is not local to incrementBy. The function startAt returns a closure containing the function incrementBy, which adds the y value to the x value, and a reference to the variable x from this invocation of startAt, so incrementBy will know where to find it once invoked:function startAt(x) function incrementBy(y) return x + y return incrementByvariable closure1 = startAt(1)variable closure2 = startAt(5)Note that, as startAt returns a function, the variables closure1 and closure2 are of function type. Invoking closure1(3) will return 4, while invoking closure2(3) will return 8. While closure1 and closure2 refer to the same function incrementBy, the associated environments differ, and invoking the closures will bind the name x to two distinct variables with different values in the two invocations, thus evaluating the function to different results.
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