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CodeSignal

Pattern Matching, Lists, and Recursion in Haskell

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Overview

Learn how Haskell structures data and replaces loops. Use pattern matching, lists, strings, tuples, safe access with `Maybe`, list comprehensions, and recursion, including accumulator-style recursion.

Syllabus

  • Unit 1: Pattern Matching on Values
    • Spelling Out Digits by Cases
    • Spotting Vowels with Pattern Matching
  • Unit 2: Lists and String Sequences
    • Growing Lists of Numbers
    • The Secret Identity of Strings
  • Unit 3: Safe List Operations
    • Querying and Slicing Lists Safely
    • Reading the First Item Safely
  • Unit 4: Grouping Data with Tuples
    • Pairing a Name and Age
    • Packing and Unpacking Number Pairs
  • Unit 5: Haskell List Comprehensions
    • Transforming and Filtering with Comprehensions
    • Pairing Lists into Tuples
  • Unit 6: Recursion Over Lists
    • Adding Up a List
    • Counting Items One by One
    • Searching a List with Recursion
  • Unit 7: Recursion with Accumulators
    • Summing with a Running Total
    • Building a List in Reverse
    • Counting Items the Accumulator Way

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