Haskell Book Solution

This documents my solution to Haskell Book Exercises.

Notes

1. All You Need is Lambda
2. Hello, Haskell!
3. Strings
4. Basic datatypes
5. Types
6. Type classes
7. More functional patterns
8. Recursion
9. Lists
10. Folding lists
11. Algebraic datatypes
12. Signaling adversity
13. Building projects
14. Testing
15. Monoid, Semigroup
16. Functor
17. Applicative
18. Monad
19. Applying structure
20. Foldable
21. Traversable
22. Reader
23. State
24. Parser combinators
25. Composing types
26. Monad transformers
27. Nonstrictness
28. Basic libraries
29. IO
30. When things go wrong
31. Final project

Chapter 1: All You Need is Lambda

1. Intermission: Equivalence Exercises
2. Chapter 1 Exercises

Chapter 2: Hello, Haskell

1. SayHello
2. Exercises: Comprehension Check
3. Exercises: Parentheses and Association
4. Exercises: Heal The Sick
5. Exercises: A Head Code
6. Rewrite with Where
7. Chapter 2 Exercises
8. WaxOn.hs

Chapter 3: Strings

1. Exercises: Scope
2. Exercises: Syntax Errors
3. PrintBroken.hs
4. Chapter 3 Exercises
5. Chapter 3 Exercises: Curry is Awesome
6. Chapter 3 Exercises: Third Letter
7. Chapter 3 Exercises: Letter Index
8. Chapter 3 Exercises: Reverse

Chapter 4: Basic datatypes

1. Exercises: Mood Swing
2. Exercises: Syntax Errors
3. Chapter 4 Exercises
4. Chapter 4 Exercises: #8: isPalindrome
5. Chapter 4 Exercises: #9: myAbs

Chapter 5: Types

1. Exercises: Type Matching
2. Exercises: Type Arguments
3. Exercises: Parametricity
4. Exercises: Apply Yourself
5. Chapter 5 Exercises
6. Chapter 5 Exercises: Determine the type
7. Chapter 5 Exercises: Does it compile
8. Chapter 5 Exercises: Type Signature
9. Chapter 5 Exercises: Write The Function
10. Chapter 5 Exercises: Sing
11. Chapter 5 Exercises: Sing 2
12. Chapter 5 Exercises: Arith3Broken
13. Chapter 5 Exercises: Type-Kwon-Do

Chapter 6: Type Classes

1. Exercises: Eq Instances
2. Exercises: Tuple Experiment
3. Exercises: Will They Work
4. Chapter 6 Exercises
5. Chapter 6 Exercises: Does It Typecheck
6. Chapter 6 Exercises: Match The Types
7. Chapter 6 Exercises: Type-Kwon-Do Two: Electric Typealoo

Chapter 7: More Functional Patterns

1. Exercises: Grab Bag
2. Exercises: Variety Pack
3. Exercises: Case Practice
4. Exercises: Artful Dodgy
5. Exercises: Guard Duty
6. Exercises: Arith 2
7. Chapter 7 Exercises
8. Chapter 7 Exercises: Let's Write Code
9. Chapter 7 Exercises: Arith4 Version A
10. Chapter 7 Exercises: Arith4 Version B
11. Chapter 7 Exercises: Arith4 Version C

Chapter 8: Recursion

1. Exercises: Intermission
2. Chapter 8 Exercises
3. Chapter 8 Exercises: Reviewing Currying
4. Chapter 8 Exercises: Recursion
5. Chapter 8 Exercises: Fixing DividedBy
6. Chapter 8 Exercises: McCarthy91 Function
7. Chapter 8 Exercises: Numbers into Words

Chapter 9: Lists

1. Exercises: safeHead
2. Exercise: EnumFromTo
3. Exercise: Fearful Symmetry
4. Exercise: PoemLines
5. Exercise: Comprehend Thy Lists
6. Exercise: Square Cube
7. Exercise: Bottom Madness
8. Exercise: More Bottoms
9. Exercise: More Bottom - #6
10. Exercise: Filtering
11. Exercise: Zipping
12. Chapter 9 Exercises: Data Char
13. Chapter 9 Exercises: Cipher
14. Chapter 9 Exercises: Standard Functions

Chapter 10: Folding Lists

1. Exercises: Understanding Folds
2. Exercises: Database Processing
3. Exercises: Scan
4. Chapter 10 Exercises: Warm Up
5. Chapter 10 Exercises: Rewriting Functions

Chapter 11: Algebraic Datatypes

1. Exercises: Dog Types
2. Exercises: Vehicles
3. Exercises: Cardinality
4. Exercises: For Example
5. Exercises: Logic Goats
6. Exercises: Pity the Bool
7. Record Syntax
8. Exercises: How Does Your Garden Grow?
9. Exercises: Programmers
10. Exponentiation in what order?
11. Exercises: The Quad
12. Exercises: BinaryTree
13. Chapter 11 Exercises
14. Chapter 11 Exercises: Ciphers
15. Chapter 11 Exercises: As Patterns and Language Exercise
16. Chapter 11 Exercises: Phone Exercise
17. Chapter 11 Exercises: Hutton's Razor

Chapter 12: Signaling Adversity

1. Chapter 12 Exercises: Determine The Kinds
2. Chapter 12 Exercises: Determine The Kinds
3. Chapter 12 Exercises: String Processing
4. Chapter 12 Exercises: Validate The Word
5. Chapter 12 Exercises: Its Only Natural
6. Chapter 12 Exercises: Small Library for Maybe
7. Chapter 12 Exercises: Small Library for Either
8. Chapter 12 Exercises: Write your own iterate and unfoldr
9. Chapter 12 Exercises: Finally something other than a list!

Chapter 13: Building Projects

1. Intermission: Check your understanding
2. Chapter 13 Exercises: Hangman
3. Chapter 13 Exercises: Cipher
4. Chapter 13 Exercises: Palindrome
5. Chapter 13 Exercises: Exercise 4 - ValidatePerson

Chapter 14: Testing

1. Intermission: Short Exercise
2. Morse Code
3. Chapter 14 Exercises: WordNumber
4. Chapter 14 Exercises: Using QuickCheck
5. Chapter 14 Exercises: Failure
6. Chapter 14 Exercises: Idempotence
7. Chapter 14 Exercises: Make a Gen random generator for the datatype
8. TODO: Chapter 14 Exercises: Hangman testing
9. Chapter 14 Exercises: Validating ciphers

Chapter 15: Monoid, Semigroup

1. Exercise: Optional Monoid
2. Madness
3. Exercise: Maybe Another Monoid
4. Chapter 15 Exercises: Semigroup
5. Chapter 15 Exercises: Validation
6. Chapter 15 Exercises: Monoid
7. Chapter 15 Exercises: Mem

Chapter 16: Functor

1. Exercises: Be Kind
2. Typecheck (fmap.fmap)
3. ReplaceExperiment
4. Exercises: Heavy Lifting
5. Exercises: Instances of Func
6. Exercises: Possibly
7. Short Exercise
8. Chapter 16 Exercises

Chapter 17: Applicative

1. Exercises: Lookups
2. Exercises: Identity Instance
3. Exercises: Constant Instance
4. Exercises: Fixer Upper
5. Exercises: List Applicative
6. Exercises: ZipList Applicative

Resources

1. Understanding Basic Haskell Error Messages