PDF-What is subtyping?

Subtypes CSE 331 Autumn 2010 x2022 Sometimes every B is an A x2013 In a library database x2022 every book is a library holding x2022 every CD is a library holding x2022 Subtyping expre. Hall Katherine W Phillips Sarah SM Townsend Organization and Management Department Goizueta Business School Emory University USA Management Division Columbia Business School Columbia University USA Management and Organization Department Marshall S Subsumption. Some . types . are better . than others, in the . sense that a value . of one can . always safely be used. where a value of . the other . is expected.. Which can be formalized as by introducing: . Lecture 27. Generics vs. Subtyping; Bounded Polymorphism. Dan Grossman. Fall 2011. Today. Compare . generics and . subtyping. What each is good for. Combine generics and subtyping to get even more . benefit. Ben Greenman, . Fabian Muehlboeck. , and Ross Tate. Cornell University. Typesafe. Equality + Generic Lists?. (. Typesafe. ) Equality. @override. public . boolean. equals(Object other) {. . if(other . ANALYSIS OF PROG. LANGS. Type . Systems. Instructors: Crista Lopes. Copyright © Instructors.. Polymorphism. Constructs . that can take different . forms.  . poly = many. morph = shape. Types of Polymorphism. Renementsr::=:::varies:::BasicTypesb::=fv:Intjrgj:::Types::=bjx:!Environment::=;jx:;Subtyping`12Abbreviationsx:frg:=x:fx:Intjrgfxjrg:=fx:Intjrgfrg:=fv:Intjrgfx:fy:Intjrygjrxg:=fx:Intjrx^ry[ / Winter 2016. CSE 331. Software Design and Implementation. Lecture 14. Generics 2. Hi, I’m James!. Big picture. Last time: Generics intro. Subtyping. and Generics. Using . bounds. for more flexible subtyping. Practices. Zhenjiang Hu, . Haiyan. Zhao, Yingfei Xiong. Peking University, Spring Term, 2016. Chap 17. Please refer to the package of “. joinexrercise. ”. Subtype Relation. Records. “Algorithmic” subtype relation. Ravi Chugh. Motivation: Dynamic Languages. Dynamically-typed languages. Enable rapid prototyping. Facilitate inter-language development. Statically-typed languages. Prevent certain run-time errors. Enable optimized execution. Lecture 25. Subtyping for OOP;. Comparing/Combining Generics and Subtyping . Dan Grossman. Winter 2013. Now…. Use what we learned about subtyping for records and functions to understand subtyping for class-based OOP. Ben Greenman, . Fabian Muehlboeck. , and Ross Tate. Cornell University. Typesafe. Equality Generic Lists?. (. Typesafe. ) Equality. @override. public . boolean. equals(Object other) {. . if(other . CSCE 314: Programming Languages . Prof. Lupoli, (much from Dr. . Dylan . Shell). Abstract Data Types (ADTs). Object-oriented programming has its roots in ADTs. ADTs. Encapsulate state along with a set of operations . Ravi Chugh. Motivation: Dynamic Languages. Dynamically-typed languages. Enable rapid prototyping. Facilitate inter-language development. Statically-typed languages. Prevent certain run-time errors. Enable optimized execution. Jason Tackett, Mark Vaughan, Jay Kar, Ali Omar. Altitude (km). dust. polluted dust. dusty marine. clean marine. smoke. Subtype. 532 nm lidar ratio (. sr. ). 1064 nm lidar ratio (. sr. ). Clean marine.