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

#	Title	Views
1	Non-strict functions, bottom, and Scala by-name parameters	617
2	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	688
3	Year when lambda functions were introduced in various languages	702
4	De Morgan's Laws are Monoid Homomorphisms	707
5	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	734
6	Monad as Functor with pair of Natural Transformations	742
7	Addendum to `Monads do not Compose`	753
8	Monad Transformers - Part 1	763
9	Functor Composition	767
10	Function Composition - forward composition versus backward composition	781
11	Monads do not Compose	795
12	The Functional Programming Triad of fold, scan and iterate	833
13	Ad hoc Polymorphism using Type Classes and Cats	901
14	Writer Monad for logging execution of functions	907
15	Natural Transformations	920
16	Monoids - Part 2 - With examples using Scalaz and Cats	942
17	Sequence and Traverse - Part 2	944
18	State Monad	944
19	Sequence and Traverse - Part 3	953
20	Sequence and Traverse - Part 1	955
21	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	957
22	Monoids - Part 1 - With examples using Scalaz and Cats	960
23	Functional Effects - Part 2	961
24	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	964
25	Functional Effects - Part 1	986
26	Game of Life - Polyglot FP - Haskell and Scala - Part 2	989
27	Monad Fact #2	1005
28	Game of Life - Polyglot FP - Haskell and Scala - Part 3	1006
29	Folding Cheat Sheet Series Titles	1013
30	The aggregate function - from sequential and parallel folds to parallel aggregation	1020
31	Monad Fact #6	1026
32	Folding Unfolded - Part 4	1028
33	Function Applicative for Great Good of Palindrome Checker Function	1031
34	Fusing Transformations of Strict Scala Collections with Views	1031
35	Monad Fact #5	1039
36	Functor Laws	1040
37	Monad Fact #3	1042
38	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	1052
39	Arrive at monads by going from composition of pure functions to composition of effectful functions	1062
40	Applicative Functor - Part 3	1068
41	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	1072
42	Folding Unfolded - Part 3	1073
43	A sighting of traverseFilter and foldMap in Practical FP in Scala	1073
44	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	1075
45	Folding Unfolded - Part 5	1078
46	The Uniform Access Principle	1079
47	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	1086
48	A sighting of sequence function in Practical FP in Scala	1090
49	‘go-to’ general-purpose sequential collections - from Java To Scala	1092
50	Sum and Product Types - The Fruit Salad & Fruit Snack Example	1098
51	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	1106
52	Monad Fact #4	1119
53	The Monad Fact Series	1125
54	A sighting of traverse_ in Practical FP in Scala	1133
55	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1140
56	Monad Fact #1	1145
57	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	1168
58	Applicative Functor - Part 1	1189
59	Folding Unfolded - Part 2	1195
60	Kleisli Composition	1213
61	Folding Unfolded - Part 1	1215
62	The Sieve of Eratosthenes - Part 1	1226
63	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	1239
64	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	1244
65	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	1249
66	Computer Graphics in Java and Scala - Part 1b	1260
67	Definitions of Functional Programming	1262
68	Game of Life - Polyglot FP - Haskell and Scala - Part 1	1269
69	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	1272
70	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	1274
71	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	1279
72	Applicative Functor - Part 2	1299
73	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	1308
74	Scala 3 enum for a terser Option Monad Algebraic Data Type	1320
75	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	1352
76	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	1353
77	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	1357
78	From Scala Monadic Effects to Unison Algebraic Effects	1359
79	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	1362
80	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	1380
81	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	1390
82	Computer Graphics in Java and Scala - Part 1	1396
83	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1414
84	The Expression Problem Part 1	1429
85	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	1447
86	Scala Left Fold Parallelisation - Three Approaches	1500
87	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	1570
88	AI Concepts - MCP Neurons	1593
89	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	1630
90	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	1651
91	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	1672
92	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	1752
93	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1759
94	Compositionality and Category Theory	1783
95	The Expression Problem Part 2	1908
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	1932
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	1942
98	Hand Rolled Applicative User Validation Code Kata	2115
99	Point-free or Die - Tacit Programming in Haskell	2139
100	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	2189
101	A Sighting of filterA in Typelevel Rite of Passage	2213
102	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	2216
103	Tagless Final Encoding - Algebras and Interpreters and also Programs	2260
104	Folding Cheat Sheet #8 - Folding with monoids	2324
105	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	2390
106	Folding Cheat Sheet #3 - The universal property of fold	2537
107	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	2545
108	Function Applicative for Great Good of Leap Year Function	2644
109	The Bowling Game - From Imperative to Functional Programming - Part 1	2645
110	Fibonacci Function Gallery - Part 1	2650
111	The Functional Programming Triad of map, filter and fold	2722
112	Folding Cheat Sheet #7 - The three duality theorems of fold	2740
113	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	2856
114	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	2934
115	Fibonacci Function Gallery - Part 2	2985
116	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	3678
117	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	3856
118	Monad Laws Must Be Checked	4137
119	Folding Cheat Sheet #6 - Left and right folds and tail recursion	4741
120	The Open-Closed Principle - Part 1 - The Original Version	4873
121	N-Queens Combinatorial Puzzle meets Cats	5520
122	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	10747