Modules and Abstract Data Types 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 The Reality of Development We rarely know the right algorithms or the right data structures when we start a design […]
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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
OCaml Datatypes 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 OCaml So Far • We have seen a number of basic types: – int – float – char – string – bool
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Project 3: File System Management COP 5614 – Operating Systems The original design of this assignment can be accredited to Prof. Andrea C. Arpaci-Dusseau at University of Wisconsin-Madison. Modifications were made to fit with the current course whenever appropriate. You should submit the required deliverable materials to Canvas by 11:59pm, Nov. 23rd, 2020 (Monday). 1.
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Scope, Functions and Storage Management Mitchell Chapter 7 Implementing Programming Languages • In this chapter, storage management for block-structured languages is described by the run-time data structures that are used in a simple reference implementation. • Association between names in programs and memory locations is a key aspect. – Scope: allows two syntactically identical names
Simple Data 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 1 What is the single most important mathematical concept ever developed in human history? 2 What is the single most important mathematical concept
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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
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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