ITEC 380 2020spring ibarland

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structs intro
incl. immutability (using racket)

2020-Feb: For Feb-11 To prepare for lecture, watch the first two videos below (video: structs intro (part 1) (14m25s) and video: part 2: template for structs (21m41s) ). A short quiz is on D2L.

• book.rkt (before videos)
• Structs in racket: defining; constructors & accessors; examples of the data. video: structs intro (part 1) (14m25s)
  
  
• Functions processing structs; the template for structs. video: structs intro (part 2) (21m41s)
  
  
• Functions returning structs; new structs rather than mutating. video: structs intro (part 3) (19m15s)
  
  
• book.rkt (at end of videos)
• Book.java and Book.scala
  video: boilerplate-java-1-constructor-toString (20m16s)
  
  

  Related: Although it's not part of the gist of the course, in Java we also need to know video: how to override equals (19m15s) and video: how to override hashCode (14m35s). It's neither auto-provided (as it is in racket), nor immediately-obvious.

opening notes in .rkt files: Many of the lecture-notes links are .rkt files (not .html). You should (a) download the file (say, via right-click or save-as), (b) start DrRacket, and then (c) choose File &goto; Open… them. Do not copy-paste into an empty DrRacket window — the language-preference won't be set correctly, and the initial lines may be goofed up.

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