'Lazy evaluation' presentation slideshows

Eden Parallel Functional Programming with Haskell

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i-Tasks - i nteractive workflow Tasks for the WWWEB ___________

i-Tasks - i nteractive workflow Tasks for the WWWEB ___________ Rinus Plasmeijer University of Nijmegen www.cs.ru.nl/~clean Clean Introduction Defining Interactive Multi-user Workflow Systems for the web Defining a simple task: an editor for a web form Combinators for constructing tasks

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Eager and Lazy Evaluation

Eager and Lazy Evaluation The evaluation strategies, are differentiated according to the method of passing arguments to functions. Mainly, parameter passing methods are call by value , call by reference , call by name and call by need ( a variance of call by name).

1.28k views • 78 slides

Lazy Evaluation: Infinite data structures, set comprehensions (CTM Section 4.5)

Lazy Evaluation: Infinite data structures, set comprehensions (CTM Section 4.5). Carlos Varela RPI September 22, 2017 Adapted with permission from: Seif Haridi KTH Peter Van Roy UCL. Lazy evaluation. The functions written so far are evaluated eagerly (as soon as they are called)

450 views • 44 slides

Introduction to Programming Concepts

Introduction to Programming Concepts. Carlos Varela RPI Adapted with permission from: Seif Haridi KTH Peter Van Roy UCL. Introduction. An introduction to programming concepts Declarative variables Functions Structured data (example: lists) Functions over lists

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Lexical vs. Dynamic Scope

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Declarative Programming Techniques Lazy Execution (VRH 4.5)

Declarative Programming Techniques Lazy Execution (VRH 4.5). Carlos Varela RPI Adapted with permission from: Seif Haridi KTH Peter Van Roy UCL. Overview. What is declarativeness? Classification, advantages for large and small programs Control Abstractions Iterative programs

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Haskell

Haskell. Data Types/ADT/Modules Type/Class Hierarchy Lazy Functional Language. Modelling Alternatives. New data types are useful to model values with several alternatives. Example : Recording phone calls. type History = [(Event, Time)] type Time = Int data Event = Call String

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Declarative Programming Techniques Lazy Execution (VRH 4.5)

Declarative Programming Techniques Lazy Execution (VRH 4.5). Carlos Varela RPI Adapted with permission from: Seif Haridi KTH Peter Van Roy UCL. Lazy evaluation. The default functions in Oz are evaluated eagerly (as soon as they are called)

493 views • 35 slides

David Evans cs.virginia/~evans

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Lecture 6: Lambda Calculus

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Scaling the Pipeline

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Lazy Evaluation in Numeric Computing

Lazy Evaluation in Numeric Computing. 2 0 ??????? 2006 ????? ?????????? ??????. Agenda. Elementary introduction to functional programming: reduction, composition and mapping functions Lazy Evaluation: Scheme Principles Imperative Examples Analysis Necessity in Procedure Calls

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1. Unions 2.Expressions. 3.Operators. 4.Type equivalence. 5.Coercion, casting and conversion.

COMP205 IMPERATIVE LANGUAGES. 9. EXPRESSIONS AND STATEMENTS. 1. Unions 2.Expressions. 3.Operators. 4.Type equivalence. 5.Coercion, casting and conversion. UNIONS.

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Carlos Varela RPI

Typing and Parameter Passing Dynamic and Static Typing (EPL 4.1-4, VRH 2.8.3) Parameter Passing Mechanisms (VRH 6.4.4). Carlos Varela RPI. Data types. A datatype is a set of values and an associated set of operations An abstract datatype is described by a set of operations

325 views • 20 slides

Concepts from Functional Programming Languages

Concepts from Functional Programming Languages. Peter Gorm Larsen. Agenda. Introduction to the Functional Programming Paradigm The notion of higher order functions Polymorphic examples of standard higher order functions. Introduction to FP.

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Comp 205: Comparative Programming Languages

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Laziness of Haskell

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More Programming Language Concepts

More Programming Language Concepts. Currying Lazy Evaluation Polymorphism. Currying in Functional Languages. Q. How can two functions be combined to create a new function? A. By composition. h(x) = g(f(x)) Q. How can a function and one value be combined to create a new function?

200 views • 11 slides