JavaScript to Haskell

03: Lists

Listen Later
03: Lists
Handling Lists

  • Before we get started a couple tips for shorthand in Prelude

    • * > GHCi is an interactive Haskell REPL (Read-Eval-Print-Loop) that comes with GHC. At the GHCi prompt, you can evaluate expressions, load Haskell files with :load (:l) (and reload them with :reload (:r)), ask for the type of an expression with :type (:t), and many other things (try :? for a list of commands).
    * using let in the GHCI

    • Words are are a list of chars

    • In Haskell, lists are a homogenous data structure. It stores several elements of the same type.

    • One of the most basic data types in Haskell

    • List comprehensions?

      • Like set comprehensions, normally used for building more specific sets from a larger general set
        • *

      • List Constructing

        • we should mention type signatures too
        • NOT AN ARRAY
        • ugh, what’s this mean
        • intListLength (x:xs) = 1 + intListLength xs
          • Resources
          • CIS 194
          • Real World Haskell
          • Learn You a Haskell
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              • Twitter: @jstoHaskell()
              • Site: JSToHaskell
              • microblog: @jtomchak
              • Jesse Tomchak
                • Twitter: @jtomchak

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                  JavaScript to HaskellBy Jesse Tomchak