124 Decks Ordered By PDF Download Count - Lowest First - Chse one - invert order

#	Title	Downloads
1	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	156
2	The Bowling Game - From Imperative to Functional Programming - Part 3	174
3	Non-strict functions, bottom, and Scala by-name parameters	199
4	The Functional Programming Triad of fold, scan and iterate	215
5	De Morgan's Laws are Monoid Homomorphisms	223
6	The Bowling Game - From Imperative to Functional Programming - Part 2	275
7	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	284
8	Game of Life - Polyglot FP - Haskell and Scala - Part 1	290
9	Ad hoc Polymorphism using Type Classes and Cats	297
10	Monads do not Compose	304
11	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	305
12	Function Composition - forward composition versus backward composition	305
13	Addendum to `Monads do not Compose`	305
14	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	307
15	Folding Cheat Sheet Series Titles	312
16	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	318
17	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	318
18	Monoids - Part 1 - With examples using Scalaz and Cats	322
19	Game of Life - Polyglot FP - Haskell and Scala - Part 2	329
20	Monad Fact #5	329
21	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	330
22	Function Applicative for Great Good of Palindrome Checker Function	330
23	Year when lambda functions were introduced in various languages	330
24	Functor Composition	332
25	A sighting of traverse_ in Practical FP in Scala	334
26	Sequence and Traverse - Part 3	335
27	Folding Unfolded - Part 1	336
28	Sequence and Traverse - Part 2	336
29	Functional Effects - Part 1	337
30	Folding Unfolded - Part 5	338
31	Monad Fact #6	338
32	Functional Effects - Part 2	339
33	The aggregate function - from sequential and parallel folds to parallel aggregation	343
34	Monoids - Part 2 - With examples using Scalaz and Cats	347
35	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	348
36	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	348
37	State Monad	349
38	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	353
39	Writer Monad for logging execution of functions	358
40	The Expression Problem Part 1	358
41	Monad Fact #4	362
42	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	362
43	Monad Transformers - Part 1	365
44	‘go-to’ general-purpose sequential collections - from Java To Scala	367
45	Folding Unfolded - Part 3	367
46	Applicative Functor - Part 2	372
47	The Monad Fact Series	373
48	Computer Graphics in Java and Scala - Part 1b	375
49	Monad Fact #1	380
50	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	381
51	A sighting of sequence function in Practical FP in Scala	384
52	Monad Fact #2	387
53	Computer Graphics in Java and Scala - Part 1	391
54	Sequence and Traverse - Part 1	391
55	Folding Unfolded - Part 2	392
56	A sighting of traverseFilter and foldMap in Practical FP in Scala	395
57	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	399
58	Folding Unfolded - Part 4	401
59	Arrive at monads by going from composition of pure functions to composition of effectful functions	401
60	Applicative Functor - Part 3	401
61	The Sieve of Eratosthenes - Part 1	401
62	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	405
63	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	407
64	Game of Life - Polyglot FP - Haskell and Scala - Part 3	407
65	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	419
66	Natural Transformations	422
67	AI Concepts - MCP Neurons	422
68	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	423
69	Point-free or Die - Tacit Programming in Haskell	437
70	Monad as Functor with pair of Natural Transformations	437
71	Functor Laws	439
72	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	440
73	Monad Fact #3	444
74	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	455
75	Applicative Functor - Part 1	455
76	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	462
77	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	471
78	Fusing Transformations of Strict Scala Collections with Views	474
79	Folding Cheat Sheet #3 - The universal property of fold	478
80	Folding Cheat Sheet #4 - For functions that can be defined both as a right fold and as a left fold, one may be more efficient than the other	483
81	Function Applicative for Great Good of Leap Year Function	483
82	Scala Left Fold Parallelisation - Three Approaches	484
83	From Scala Monadic Effects to Unison Algebraic Effects	489
84	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	497
85	Hand Rolled Applicative User Validation Code Kata	498
86	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	500
87	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	501
88	Folding Cheat Sheet #8 - Folding with monoids	505
89	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	521
90	Folding Cheat Sheet #7 - The three duality theorems of fold	523
91	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	529
92	Definitions of Functional Programming	531
93	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	537
94	Scala 3 enum for a terser Option Monad Algebraic Data Type	548
95	Compositionality and Category Theory	553
96	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	562
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	567
98	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	568
99	The Functional Programming Triad of map, filter and fold	580
100	A Sighting of filterA in Typelevel Rite of Passage	588
101	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	595
102	Fibonacci Function Gallery - Part 1	603
103	Sum and Product Types - The Fruit Salad & Fruit Snack Example	613
104	The Uniform Access Principle	624
105	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	647
106	The Bowling Game - From Imperative to Functional Programming - Part 1	647
107	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	647
108	Fibonacci Function Gallery - Part 2	647
109	Tagless Final Encoding - Algebras and Interpreters and also Programs	660
110	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	699
111	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	700
112	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	748
113	N-Queens Combinatorial Puzzle meets Cats	806
114	Folding Cheat Sheet #6 - Left and right folds and tail recursion	817
115	Monad Laws Must Be Checked	842
116	The Open-Closed Principle - Part 1 - The Original Version	915
117	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	942
118	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	988
119	Kleisli Composition	1134
120	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1185
121	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	1450
122	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	2329
123	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	2340
124	The Expression Problem Part 2	3515