Polymorphic Higher-Order Programming CSI 3120 Amy Felty University of Ottawa slides copyright 2017, 2018, 2019, 2020 Author David Walker, updated by Amy Felty permission granted to reuse these slides for non-commercial educational purposes Some Design & Coding Rules • Laziness can be a really good force in design. • Never write the same code twice. […]
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Control in Sequential Languages Mitchell Chapter 8 Topics – “structured” jumps that may return a value • Exceptions – dynamic scoping of exception handler • Continuations – Function representing the rest of the program – Generalized form of tail recursion • Control of evaluation order (force and delay) – Can increase efficiency – Call-by-need parameter
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Concepts in Object-Oriented Languages Mitchell Chapter 10 History – Object concept used in simulation 1960’s 1970’s 1980’s 1990’s • Simula • Smalltalk – Object-oriented design, systems • C++ – Adapted Simula ideas to C • Java – Distributed programming, internet 2 Varieties of Object-Oriented Languages • class-basedlanguages – behavior of object determined by its class
Introduction and Definitions Most programming languages describe computation in an imperative style. Some definitions from Wikipedia: Imperative Programming Imperative programs define sequences of commands for the computer to perform. A programming paradigm that describes computation in terms of statements that change a program state Declarative programming Declarative programs express what the program
Mutation CSI 3120 Amy Felty University of Ottawa slides copyright 2017, 2018, 2019, 2020 Author David Walker, updated by Amy Felty permission granted to reuse these slides for non-commercial educational purposes mutable set immutable set Reasoning about Mutable State is Hard insert i s1; f x; member i s1 let s1 = insert i s0
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Thinking Inductively CSI 3120 Amy Felty University of Ottawa slides copyright 2017, 2018, 2019, 2020 Author David Walker, updated by Amy Felty permission granted to reuse these slides for non-commercial educational purposes 2 Options A value v has type t option if it is either: – the value None, or – a value Some v’,
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INTRODUCTION TO OCAML slides copyright 2017, 2018, 2019, 2020 Author David Walker, updated by Amy Felty permission granted to reuse these slides for non-commercial educational purposes Alonzo Church, 1903-1995 Princeton Professor, 1929-1967 In 1936, Alonzo Church invented the lambda calculus. He called it a logic, but it was a language of pure functions — the
For a short humorous talk on languages without strong typing: https://www.destroyallsoftware.com/talks/wat [Broader point: No one (few people) knows what their programs do in untyped languages.] 1 Type Checking Basics CSI 3120 Amy Felty University of Ottawa slides copyright 2017, 2018, 2019, 2020 Author David Walker, updated by Amy Felty permission granted to reuse these slides
Polymorphic Higher-Order Programming CSI 3120 Amy Felty University of Ottawa slides copyright 2017, 2018, 2019, 2020 Author David Walker, updated by Amy Felty permission granted to reuse these slides for non-commercial educational purposes Some Design & Coding Rules • Laziness can be a really good force in design. • Never write the same code twice.
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1007ICT / 1807ICT / 7611ICT Computer Systems & Networks 2A. Data Representation Last Lecture Copyright By PowCoder代写 加微信 powcoder Topics covered: • Basic Components of Computer Systems • Evolution of Computer Hardware © . Revised and updated by , , and Wee Lum 2 This Lecture’s Content Learningobjectives Computerdata Representingbinaryintegers Convertingfrombinarytodecimal
CS代考 UTF-32, UTF-16, UTF-8, and UTF-7. The numbers indicate the number of bits i Read More »