123 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	110
2	The Functional Programming Triad of fold, scan and iterate	170
3	Non-strict functions, bottom, and Scala by-name parameters	174
4	The Bowling Game - From Imperative to Functional Programming - Part 2	186
5	De Morgan's Laws are Monoid Homomorphisms	197
6	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	241
7	Ad hoc Polymorphism using Type Classes and Cats	246
8	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	247
9	Monads do not Compose	256
10	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	257
11	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	263
12	Game of Life - Polyglot FP - Haskell and Scala - Part 1	266
13	Folding Cheat Sheet Series Titles	267
14	Addendum to `Monads do not Compose`	268
15	Function Composition - forward composition versus backward composition	270
16	Year when lambda functions were introduced in various languages	274
17	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	274
18	Sequence and Traverse - Part 3	280
19	Monad Fact #5	281
20	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	282
21	Sequence and Traverse - Part 2	285
22	Monoids - Part 1 - With examples using Scalaz and Cats	286
23	Game of Life - Polyglot FP - Haskell and Scala - Part 2	290
24	Functor Composition	290
25	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	291
26	Functional Effects - Part 1	293
27	Function Applicative for Great Good of Palindrome Checker Function	296
28	Folding Unfolded - Part 5	298
29	Monad Fact #6	299
30	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	299
31	Functional Effects - Part 2	300
32	Folding Unfolded - Part 1	301
33	Monoids - Part 2 - With examples using Scalaz and Cats	303
34	A sighting of traverse_ in Practical FP in Scala	303
35	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	305
36	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	309
37	State Monad	310
38	The aggregate function - from sequential and parallel folds to parallel aggregation	310
39	Monad Transformers - Part 1	318
40	The Expression Problem Part 1	321
41	Applicative Functor - Part 2	326
42	Monad Fact #4	327
43	‘go-to’ general-purpose sequential collections - from Java To Scala	328
44	Writer Monad for logging execution of functions	329
45	Sequence and Traverse - Part 1	331
46	Computer Graphics in Java and Scala - Part 1b	333
47	Folding Unfolded - Part 3	334
48	Monad Fact #2	339
49	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	340
50	The Sieve of Eratosthenes - Part 1	341
51	The Monad Fact Series	341
52	Monad Fact #1	345
53	A sighting of sequence function in Practical FP in Scala	346
54	Folding Unfolded - Part 2	347
55	Computer Graphics in Java and Scala - Part 1	347
56	AI Concepts - MCP Neurons	348
57	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	350
58	Arrive at monads by going from composition of pure functions to composition of effectful functions	350
59	Applicative Functor - Part 3	352
60	Folding Unfolded - Part 4	359
61	A sighting of traverseFilter and foldMap in Practical FP in Scala	360
62	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	361
63	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	366
64	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	366
65	Game of Life - Polyglot FP - Haskell and Scala - Part 3	367
66	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	375
67	Natural Transformations	375
68	Monad as Functor with pair of Natural Transformations	381
69	Point-free or Die - Tacit Programming in Haskell	386
70	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	389
71	Functor Laws	394
72	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	400
73	Fusing Transformations of Strict Scala Collections with Views	401
74	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	409
75	Monad Fact #3	410
76	Applicative Functor - Part 1	422
77	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	425
78	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	437
79	Function Applicative for Great Good of Leap Year Function	440
80	Scala Left Fold Parallelisation - Three Approaches	441
81	Folding Cheat Sheet #3 - The universal property of fold	443
82	From Scala Monadic Effects to Unison Algebraic Effects	444
83	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	445
84	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	450
85	Folding Cheat Sheet #8 - Folding with monoids	452
86	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	457
87	The Bowling Game - From Imperative to Functional Programming - Part 1	459
88	Hand Rolled Applicative User Validation Code Kata	464
89	Definitions of Functional Programming	469
90	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	471
91	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	476
92	Folding Cheat Sheet #7 - The three duality theorems of fold	477
93	Scala 3 enum for a terser Option Monad Algebraic Data Type	489
94	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	495
95	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	498
96	Compositionality and Category Theory	499
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	512
98	Sum and Product Types - The Fruit Salad & Fruit Snack Example	514
99	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	520
100	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	520
101	The Functional Programming Triad of map, filter and fold	533
102	Fibonacci Function Gallery - Part 1	536
103	A Sighting of filterA in Typelevel Rite of Passage	537
104	The Uniform Access Principle	558
105	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	578
106	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	583
107	Fibonacci Function Gallery - Part 2	595
108	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	616
109	Tagless Final Encoding - Algebras and Interpreters and also Programs	622
110	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	626
111	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	696
112	N-Queens Combinatorial Puzzle meets Cats	699
113	Folding Cheat Sheet #6 - Left and right folds and tail recursion	747
114	Monad Laws Must Be Checked	774
115	The Open-Closed Principle - Part 1 - The Original Version	842
116	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	865
117	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	892
118	Kleisli Composition	1056
119	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1139
120	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	1384
121	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	2156
122	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	2171
123	The Expression Problem Part 2	3355