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

#	Title	Views
1	Non-strict functions, bottom, and Scala by-name parameters	679
2	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	750
3	De Morgan's Laws are Monoid Homomorphisms	759
4	Year when lambda functions were introduced in various languages	766
5	Monad as Functor with pair of Natural Transformations	804
6	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	805
7	Addendum to `Monads do not Compose`	819
8	Functor Composition	829
9	Monad Transformers - Part 1	830
10	Function Composition - forward composition versus backward composition	848
11	Monads do not Compose	862
12	The Functional Programming Triad of fold, scan and iterate	913
13	Writer Monad for logging execution of functions	968
14	Ad hoc Polymorphism using Type Classes and Cats	970
15	Natural Transformations	976
16	State Monad	1008
17	Sequence and Traverse - Part 2	1011
18	Sequence and Traverse - Part 3	1015
19	Monoids - Part 2 - With examples using Scalaz and Cats	1016
20	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	1021
21	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	1022
22	Functional Effects - Part 2	1031
23	Sequence and Traverse - Part 1	1035
24	Monoids - Part 1 - With examples using Scalaz and Cats	1036
25	Game of Life - Polyglot FP - Haskell and Scala - Part 2	1050
26	Functional Effects - Part 1	1052
27	Game of Life - Polyglot FP - Haskell and Scala - Part 3	1067
28	Monad Fact #2	1076
29	Folding Cheat Sheet Series Titles	1078
30	Monad Fact #6	1085
31	Folding Unfolded - Part 4	1087
32	The aggregate function - from sequential and parallel folds to parallel aggregation	1088
33	Fusing Transformations of Strict Scala Collections with Views	1088
34	Function Applicative for Great Good of Palindrome Checker Function	1100
35	Functor Laws	1104
36	Monad Fact #5	1107
37	Monad Fact #3	1108
38	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	1117
39	Arrive at monads by going from composition of pure functions to composition of effectful functions	1131
40	A sighting of traverseFilter and foldMap in Practical FP in Scala	1134
41	Applicative Functor - Part 3	1137
42	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	1138
43	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	1138
44	Folding Unfolded - Part 3	1142
45	Folding Unfolded - Part 5	1146
46	A sighting of sequence function in Practical FP in Scala	1149
47	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	1150
48	The Uniform Access Principle	1152
49	Sum and Product Types - The Fruit Salad & Fruit Snack Example	1154
50	‘go-to’ general-purpose sequential collections - from Java To Scala	1162
51	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	1172
52	Monad Fact #4	1183
53	The Monad Fact Series	1198
54	A sighting of traverse_ in Practical FP in Scala	1198
55	Monad Fact #1	1207
56	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1209
57	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	1239
58	Applicative Functor - Part 1	1268
59	Kleisli Composition	1279
60	Folding Unfolded - Part 2	1281
61	Folding Unfolded - Part 1	1294
62	The Sieve of Eratosthenes - Part 1	1305
63	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	1316
64	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	1320
65	Definitions of Functional Programming	1328
66	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	1336
67	Computer Graphics in Java and Scala - Part 1b	1340
68	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	1343
69	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	1350
70	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	1350
71	Game of Life - Polyglot FP - Haskell and Scala - Part 1	1364
72	Applicative Functor - Part 2	1383
73	Scala 3 enum for a terser Option Monad Algebraic Data Type	1393
74	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	1394
75	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	1428
76	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	1434
77	From Scala Monadic Effects to Unison Algebraic Effects	1437
78	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	1438
79	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	1442
80	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	1451
81	Computer Graphics in Java and Scala - Part 1	1479
82	The Expression Problem Part 1	1486
83	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1507
84	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	1518
85	Scala Left Fold Parallelisation - Three Approaches	1584
86	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	1632
87	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	1689
88	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	1700
89	AI Concepts - MCP Neurons	1714
90	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	1739
91	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	1755
92	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	1835
93	Compositionality and Category Theory	1847
94	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1851
95	The Bowling Game - From Imperative to Functional Programming - Part 2	1954
96	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	2008
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	2038
98	Hand Rolled Applicative User Validation Code Kata	2204
99	Point-free or Die - Tacit Programming in Haskell	2206
100	The Expression Problem Part 2	2229
101	A Sighting of filterA in Typelevel Rite of Passage	2278
102	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	2298
103	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	2331
104	Tagless Final Encoding - Algebras and Interpreters and also Programs	2342
105	Folding Cheat Sheet #8 - Folding with monoids	2396
106	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	2481
107	Folding Cheat Sheet #3 - The universal property of fold	2603
108	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	2614
109	Function Applicative for Great Good of Leap Year Function	2740
110	Fibonacci Function Gallery - Part 1	2752
111	Folding Cheat Sheet #7 - The three duality theorems of fold	2811
112	The Functional Programming Triad of map, filter and fold	2850
113	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	2957
114	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	3015
115	Fibonacci Function Gallery - Part 2	3075
116	The Bowling Game - From Imperative to Functional Programming - Part 1	3208
117	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	3753
118	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	4183
119	Monad Laws Must Be Checked	4492
120	Folding Cheat Sheet #6 - Left and right folds and tail recursion	5108
121	The Open-Closed Principle - Part 1 - The Original Version	5266
122	N-Queens Combinatorial Puzzle meets Cats	5897
123	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	11378