PPT-CSE341: Programming Languages

Lecture 18 Static vs Dynamic Typing Dan Grossman Fall 2011 Static vs dynamic typing A big juicy essential topic about how to think about PLs Conversation usually overrun with halfinformed opinions . Classification of programming languages. “There are only two kinds of programming languages: those people always bitch about and those nobody uses.”. --. Bjarne. . Stroustrup. 1. . Generated using wordle.net from the text of this ppt file. Lecture 14. Introduction to Racket. Dan Grossman. Fall 2011. Racket. Next 2+ weeks will use the Racket language (not ML) and the . DrRacket. programming environment (not . emacs. ). Installation / basic usage instructions on course website. Introduction To Ruby; Dynamic OOP; "Duck Typing". Alan Borning. Autumn 2012. (slides borrowed from Dan Grossman). The plan. Lecture materials may not recount every little language feature we use. Thomas book . Classification of programming languages. “There are only two kinds of programming languages: those people always bitch about and those nobody uses.”. --. Bjarne. . Stroustrup. 1. . Generated using wordle.net from the text of this ppt file. CS 170b. Benjamin Gaska, much help from William Mitchell. What is a programming language. A simple definition:. A system for describing computation.. It is generally agreed that in order for a language to be . Lecture 14. Thunks. , Laziness, Streams, . Memoization. Dan Grossman. Winter 2013. Delayed evaluation. For each language construct, the semantics specifies when . subexpressions. get evaluated. In ML, Racket, Java, C:. Lecture 17. Implementing Languages Including Closures. Dan Grossman. Autumn . 2018. Typical workflow. Autumn 2018. 2. CSE341: Programming Languages. "(. fn. x => x x) 4". Parsing. Call. Function. Lecture 24. Subtyping . Dan Grossman. Autumn . 2018. Last major topic: Subtyping. Build up key ideas from first principles. In . pseudocode. because:. No time for another language. Simpler . to first show subtyping without objects. Lecture 18. Static vs. Dynamic Typing. Dan Grossman. Autumn . 2018. Key differences. Racket and ML have . much. . . in common. Key differences. Syntax. Pattern-matching vs. . struct. -tests and . accessor. Lecture 19. Introduction to Ruby and OOP. Dan Grossman. Autumn . 2018. Ruby logistics. Next two sections use the Ruby language. http://. www.ruby-lang.org/. Installation / basic usage instructions on course website. Lecture 22. OOP . vs. Functional Decomposition; Adding Operators & Variants; . Double-Dispatch . Dan Grossman. Autumn . 2018. Breaking things down. In functional (and procedural) programming, break programs down into . Lecture . 6. Tail Recursion, Accumulators, Exceptions. Dan Grossman. Fall 2011. Two unrelated topics. Tail recursion. Exceptions. Fall 2011. 2. CSE341: Programming Languages. Recursion. Should now be comfortable with recursion:. Lecture 17. Implementing Languages Including Closures. Dan Grossman. Spring 2013. Typical workflow. Spring 2013. 2. CSE341: Programming Languages. "(. fn. x => x + x) 4". Parsing. Call. Function. Lecture . 6. Nested Patterns. Exceptions. Tail Recursion. Dan Grossman. Spring . 2013. Nested patterns. We can nest patterns as deep as we want. Just like we can nest expressions as deep as we want. Often avoids hard-to-read, wordy nested case expressions.