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

#	Title	Views
1	Non-strict functions, bottom, and Scala by-name parameters	618
2	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	691
3	Year when lambda functions were introduced in various languages	704
4	De Morgan's Laws are Monoid Homomorphisms	708
5	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	735
6	Monad as Functor with pair of Natural Transformations	744
7	Addendum to `Monads do not Compose`	754
8	Monad Transformers - Part 1	765
9	Functor Composition	768
10	Function Composition - forward composition versus backward composition	782
11	Monads do not Compose	796
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	909
15	Natural Transformations	921
16	Monoids - Part 2 - With examples using Scalaz and Cats	943
17	State Monad	944
18	Sequence and Traverse - Part 2	948
19	Sequence and Traverse - Part 3	954
20	Sequence and Traverse - Part 1	957
21	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	958
22	Functional Effects - Part 2	961
23	Monoids - Part 1 - With examples using Scalaz and Cats	962
24	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	964
25	Functional Effects - Part 1	987
26	Game of Life - Polyglot FP - Haskell and Scala - Part 2	990
27	Monad Fact #2	1006
28	Game of Life - Polyglot FP - Haskell and Scala - Part 3	1007
29	Folding Cheat Sheet Series Titles	1016
30	The aggregate function - from sequential and parallel folds to parallel aggregation	1021
31	Monad Fact #6	1028
32	Folding Unfolded - Part 4	1031
33	Fusing Transformations of Strict Scala Collections with Views	1031
34	Function Applicative for Great Good of Palindrome Checker Function	1032
35	Monad Fact #5	1039
36	Functor Laws	1041
37	Monad Fact #3	1046
38	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	1054
39	Arrive at monads by going from composition of pure functions to composition of effectful functions	1063
40	Applicative Functor - Part 3	1069
41	A sighting of traverseFilter and foldMap in Practical FP in Scala	1073
42	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	1073
43	Folding Unfolded - Part 3	1075
44	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	1077
45	Folding Unfolded - Part 5	1080
46	The Uniform Access Principle	1080
47	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	1086
48	‘go-to’ general-purpose sequential collections - from Java To Scala	1092
49	A sighting of sequence function in Practical FP in Scala	1093
50	Sum and Product Types - The Fruit Salad & Fruit Snack Example	1099
51	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	1106
52	Monad Fact #4	1120
53	The Monad Fact Series	1126
54	A sighting of traverse_ in Practical FP in Scala	1134
55	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1141
56	Monad Fact #1	1145
57	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	1169
58	Applicative Functor - Part 1	1191
59	Folding Unfolded - Part 2	1195
60	Kleisli Composition	1214
61	Folding Unfolded - Part 1	1216
62	The Sieve of Eratosthenes - Part 1	1228
63	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	1241
64	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	1245
65	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	1252
66	Computer Graphics in Java and Scala - Part 1b	1261
67	Definitions of Functional Programming	1262
68	Game of Life - Polyglot FP - Haskell and Scala - Part 1	1273
69	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	1275
70	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	1277
71	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	1281
72	Applicative Functor - Part 2	1301
73	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	1312
74	Scala 3 enum for a terser Option Monad Algebraic Data Type	1322
75	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	1353
76	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	1354
77	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	1359
78	From Scala Monadic Effects to Unison Algebraic Effects	1360
79	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	1363
80	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	1384
81	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	1390
82	Computer Graphics in Java and Scala - Part 1	1398
83	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1415
84	The Expression Problem Part 1	1430
85	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	1448
86	Scala Left Fold Parallelisation - Three Approaches	1503
87	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	1572
88	AI Concepts - MCP Neurons	1595
89	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	1631
90	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	1653
91	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	1675
92	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	1753
93	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1762
94	Compositionality and Category Theory	1783
95	The Expression Problem Part 2	1913
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	1935
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	1945
98	Hand Rolled Applicative User Validation Code Kata	2117
99	Point-free or Die - Tacit Programming in Haskell	2142
100	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	2191
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	2325
105	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	2391
106	Folding Cheat Sheet #3 - The universal property of fold	2538
107	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	2546
108	Function Applicative for Great Good of Leap Year Function	2645
109	Fibonacci Function Gallery - Part 1	2652
110	The Bowling Game - From Imperative to Functional Programming - Part 1	2657
111	The Functional Programming Triad of map, filter and fold	2724
112	Folding Cheat Sheet #7 - The three duality theorems of fold	2742
113	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	2859
114	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	2936
115	Fibonacci Function Gallery - Part 2	2986
116	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	3682
117	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	3867
118	Monad Laws Must Be Checked	4139
119	Folding Cheat Sheet #6 - Left and right folds and tail recursion	4749
120	The Open-Closed Principle - Part 1 - The Original Version	4879
121	N-Queens Combinatorial Puzzle meets Cats	5524
122	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	10759