119 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	1
2	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	87
3	Non-strict functions, bottom, and Scala by-name parameters	110
4	De Morgan's Laws are Monoid Homomorphisms	149
5	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	155
6	Monads do not Compose	162
7	Ad hoc Polymorphism using Type Classes and Cats	166
8	Year when lambda functions were introduced in various languages	169
9	Function Composition - forward composition versus backward composition	169
10	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	174
11	Functor Composition	184
12	Folding Cheat Sheet Series Titles	197
13	Addendum to `Monads do not Compose`	198
14	Sequence and Traverse - Part 2	199
15	Monoids - Part 2 - With examples using Scalaz and Cats	199
16	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	200
17	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	201
18	Monoids - Part 1 - With examples using Scalaz and Cats	202
19	Monad Fact #5	205
20	AI Concepts - MCP Neurons	206
21	Sequence and Traverse - Part 1	210
22	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	214
23	Game of Life - Polyglot FP - Haskell and Scala - Part 1	215
24	Monad Transformers - Part 1	217
25	Game of Life - Polyglot FP - Haskell and Scala - Part 2	218
26	State Monad	218
27	Function Applicative for Great Good of Palindrome Checker Function	221
28	Functional Effects - Part 1	221
29	Sequence and Traverse - Part 3	224
30	Folding Unfolded - Part 5	227
31	Natural Transformations	227
32	Functional Effects - Part 2	233
33	Folding Unfolded - Part 1	233
34	Applicative Functor - Part 2	234
35	Arrive at monads by going from composition of pure functions to composition of effectful functions	236
36	Monad Fact #6	237
37	A sighting of traverse_ in Practical FP in Scala	239
38	‘go-to’ general-purpose sequential collections - from Java To Scala	240
39	The Sieve of Eratosthenes - Part 1	245
40	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	246
41	Folding Unfolded - Part 4	246
42	Monad Fact #2	247
43	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	247
44	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	247
45	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	248
46	Folding Unfolded - Part 2	249
47	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	249
48	Writer Monad for logging execution of functions	249
49	The aggregate function - from sequential and parallel folds to parallel aggregation	249
50	Folding Unfolded - Part 3	250
51	Monad Fact #4	252
52	Monad as Functor with pair of Natural Transformations	255
53	Computer Graphics in Java and Scala - Part 1b	256
54	Applicative Functor - Part 3	258
55	Monad Fact #1	259
56	A sighting of sequence function in Practical FP in Scala	261
57	Game of Life - Polyglot FP - Haskell and Scala - Part 3	264
58	Fusing Transformations of Strict Scala Collections with Views	265
59	The Expression Problem Part 1	270
60	The Monad Fact Series	271
61	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	276
62	Computer Graphics in Java and Scala - Part 1	277
63	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	278
64	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	281
65	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	281
66	A sighting of traverseFilter and foldMap in Practical FP in Scala	282
67	Functor Laws	287
68	Point-free or Die - Tacit Programming in Haskell	291
69	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	295
70	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	299
71	Monad Fact #3	301
72	Definitions of Functional Programming	311
73	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	318
74	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	325
75	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	327
76	Applicative Functor - Part 1	334
77	From Scala Monadic Effects to Unison Algebraic Effects	336
78	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	348
79	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	353
80	Scala Left Fold Parallelisation - Three Approaches	355
81	Function Applicative for Great Good of Leap Year Function	357
82	Folding Cheat Sheet #8 - Folding with monoids	360
83	Scala 3 enum for a terser Option Monad Algebraic Data Type	361
84	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	361
85	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	362
86	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	374
87	Sum and Product Types - The Fruit Salad & Fruit Snack Example	375
88	Folding Cheat Sheet #3 - The universal property of fold	377
89	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	377
90	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	380
91	Hand Rolled Applicative User Validation Code Kata	384
92	Fibonacci Function Gallery - Part 1	390
93	Compositionality and Category Theory	393
94	Folding Cheat Sheet #7 - The three duality theorems of fold	398
95	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	404
96	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	409
97	A Sighting of filterA in Typelevel Rite of Passage	411
98	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	412
99	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	422
100	The Uniform Access Principle	426
101	The Functional Programming Triad of map, filter and fold	442
102	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	448
103	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	449
104	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	457
105	Fibonacci Function Gallery - Part 2	465
106	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	507
107	Tagless Final Encoding - Algebras and Interpreters and also Programs	528
108	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	528
109	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	553
110	N-Queens Combinatorial Puzzle meets Cats	582
111	Folding Cheat Sheet #6 - Left and right folds and tail recursion	603
112	Monad Laws Must Be Checked	623
113	The Open-Closed Principle - Part 1 - The Original Version	698
114	Kleisli Composition	834
115	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	835
116	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	1192
117	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1332
118	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1359
119	The Expression Problem Part 2	2222