Computer Science 340
Programming Languages

Fall 2019, Siena College

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Agenda

• Announcements
  • Office hours today: after class until about 11, 2-3 PM
  • Problem Set 3: [HTML] [PDF] finish up in the next couple days
  • Problem Set 4: [HTML] [PDF] get going as soon as you can once the tokenizer is set
• More Haskell from Learn You a Haskell for Great Good!
  • functions in Haskell
    • must not begin with uppercase letters
  • Haskell's if/then/else (it's an expression!)
  • definitions: functions that take no parameters (but they're still functions!)
  • the let keyword
  • lists and list operations and functions
    • notation
    • concatenation
    • construction
    • nesting
    • accessing by index
    • comparisons (use lexicographic order)
    • head, tail, last, and init
    • length
    • null (is a function)
    • reverse, take, and drop
    • minimum and maximum
    • sum and product
    • elem
    • ranges
    • infinite lists
    • cycle, repeat, and replicate