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

#	Title	Downloads
1	The Bowling Game - From Imperative to Functional Programming - Part 2	14
2	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	91
3	Non-strict functions, bottom, and Scala by-name parameters	159
4	The Functional Programming Triad of fold, scan and iterate	165
5	De Morgan's Laws are Monoid Homomorphisms	194
6	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	223
7	Ad hoc Polymorphism using Type Classes and Cats	234
8	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	235
9	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	242
10	Monads do not Compose	247
11	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	249
12	Game of Life - Polyglot FP - Haskell and Scala - Part 1	258
13	Folding Cheat Sheet Series Titles	259
14	Addendum to `Monads do not Compose`	261
15	Year when lambda functions were introduced in various languages	261
16	Function Composition - forward composition versus backward composition	262
17	Sequence and Traverse - Part 3	267
18	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	268
19	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	268
20	Monad Fact #5	273
21	Sequence and Traverse - Part 2	278
22	Monoids - Part 1 - With examples using Scalaz and Cats	280
23	Functor Composition	280
24	Game of Life - Polyglot FP - Haskell and Scala - Part 2	281
25	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	286
26	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	287
27	Functional Effects - Part 1	287
28	Functional Effects - Part 2	289
29	Function Applicative for Great Good of Palindrome Checker Function	289
30	Folding Unfolded - Part 5	293
31	A sighting of traverse_ in Practical FP in Scala	293
32	Monad Fact #6	293
33	Folding Unfolded - Part 1	295
34	Monoids - Part 2 - With examples using Scalaz and Cats	296
35	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	299
36	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	302
37	State Monad	303
38	The aggregate function - from sequential and parallel folds to parallel aggregation	304
39	Monad Transformers - Part 1	310
40	The Expression Problem Part 1	312
41	Applicative Functor - Part 2	312
42	‘go-to’ general-purpose sequential collections - from Java To Scala	315
43	Computer Graphics in Java and Scala - Part 1b	321
44	Writer Monad for logging execution of functions	322
45	Monad Fact #2	322
46	Monad Fact #4	323
47	AI Concepts - MCP Neurons	323
48	Sequence and Traverse - Part 1	326
49	Folding Unfolded - Part 3	327
50	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	333
51	Folding Unfolded - Part 2	335
52	A sighting of sequence function in Practical FP in Scala	336
53	The Monad Fact Series	336
54	The Sieve of Eratosthenes - Part 1	337
55	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	337
56	Computer Graphics in Java and Scala - Part 1	338
57	Arrive at monads by going from composition of pure functions to composition of effectful functions	339
58	Monad Fact #1	340
59	Applicative Functor - Part 3	344
60	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	347
61	Folding Unfolded - Part 4	347
62	A sighting of traverseFilter and foldMap in Practical FP in Scala	352
63	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	354
64	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	355
65	Natural Transformations	356
66	Game of Life - Polyglot FP - Haskell and Scala - Part 3	360
67	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	365
68	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	367
69	Monad as Functor with pair of Natural Transformations	372
70	Functor Laws	379
71	Point-free or Die - Tacit Programming in Haskell	381
72	Fusing Transformations of Strict Scala Collections with Views	386
73	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	392
74	The Bowling Game - From Imperative to Functional Programming - Part 1	394
75	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	397
76	Monad Fact #3	398
77	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	416
78	Applicative Functor - Part 1	418
79	Scala Left Fold Parallelisation - Three Approaches	422
80	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	423
81	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	428
82	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	428
83	From Scala Monadic Effects to Unison Algebraic Effects	432
84	Function Applicative for Great Good of Leap Year Function	433
85	Folding Cheat Sheet #8 - Folding with monoids	435
86	Folding Cheat Sheet #3 - The universal property of fold	436
87	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	449
88	Definitions of Functional Programming	450
89	Hand Rolled Applicative User Validation Code Kata	457
90	Folding Cheat Sheet #7 - The three duality theorems of fold	460
91	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	462
92	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	468
93	Scala 3 enum for a terser Option Monad Algebraic Data Type	473
94	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	478
95	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	485
96	Compositionality and Category Theory	488
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	490
98	Sum and Product Types - The Fruit Salad & Fruit Snack Example	501
99	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	504
100	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	515
101	A Sighting of filterA in Typelevel Rite of Passage	517
102	Fibonacci Function Gallery - Part 1	518
103	The Functional Programming Triad of map, filter and fold	523
104	The Uniform Access Principle	544
105	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	561
106	Fibonacci Function Gallery - Part 2	570
107	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	575
108	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	600
109	Tagless Final Encoding - Algebras and Interpreters and also Programs	605
110	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	613
111	N-Queens Combinatorial Puzzle meets Cats	682
112	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	686
113	Folding Cheat Sheet #6 - Left and right folds and tail recursion	728
114	Monad Laws Must Be Checked	760
115	The Open-Closed Principle - Part 1 - The Original Version	819
116	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	850
117	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	872
118	Kleisli Composition	1039
119	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1131
120	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	1362
121	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	2085
122	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	2147
123	The Expression Problem Part 2	3326