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

#	Title	Views
1	Non-strict functions, bottom, and Scala by-name parameters	707
2	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	779
3	The Bowling Game - From Imperative to Functional Programming - Part 3	789
4	Year when lambda functions were introduced in various languages	790
5	De Morgan's Laws are Monoid Homomorphisms	790
6	Monad as Functor with pair of Natural Transformations	837
7	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	844
8	Addendum to `Monads do not Compose`	849
9	Monad Transformers - Part 1	853
10	Functor Composition	859
11	Function Composition - forward composition versus backward composition	882
12	Monads do not Compose	902
13	The Functional Programming Triad of fold, scan and iterate	964
14	Writer Monad for logging execution of functions	992
15	Ad hoc Polymorphism using Type Classes and Cats	1007
16	Natural Transformations	1007
17	Monoids - Part 2 - With examples using Scalaz and Cats	1039
18	State Monad	1043
19	Sequence and Traverse - Part 2	1044
20	Sequence and Traverse - Part 3	1047
21	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	1047
22	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	1053
23	Sequence and Traverse - Part 1	1061
24	Functional Effects - Part 2	1062
25	Monoids - Part 1 - With examples using Scalaz and Cats	1063
26	Functional Effects - Part 1	1076
27	Game of Life - Polyglot FP - Haskell and Scala - Part 2	1077
28	Game of Life - Polyglot FP - Haskell and Scala - Part 3	1100
29	Monad Fact #2	1101
30	Monad Fact #6	1109
31	Folding Cheat Sheet Series Titles	1112
32	Fusing Transformations of Strict Scala Collections with Views	1118
33	Folding Unfolded - Part 4	1118
34	The aggregate function - from sequential and parallel folds to parallel aggregation	1123
35	Functor Laws	1135
36	Function Applicative for Great Good of Palindrome Checker Function	1135
37	Monad Fact #5	1136
38	Monad Fact #3	1139
39	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	1142
40	Arrive at monads by going from composition of pure functions to composition of effectful functions	1164
41	A sighting of traverseFilter and foldMap in Practical FP in Scala	1166
42	Applicative Functor - Part 3	1167
43	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	1168
44	Folding Unfolded - Part 3	1171
45	Folding Unfolded - Part 5	1175
46	A sighting of sequence function in Practical FP in Scala	1175
47	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	1179
48	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	1180
49	The Uniform Access Principle	1183
50	Sum and Product Types - The Fruit Salad & Fruit Snack Example	1186
51	‘go-to’ general-purpose sequential collections - from Java To Scala	1200
52	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	1209
53	Monad Fact #4	1216
54	The Monad Fact Series	1221
55	A sighting of traverse_ in Practical FP in Scala	1230
56	Monad Fact #1	1235
57	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1237
58	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	1273
59	Applicative Functor - Part 1	1298
60	Kleisli Composition	1304
61	Folding Unfolded - Part 2	1323
62	The Sieve of Eratosthenes - Part 1	1331
63	Folding Unfolded - Part 1	1334
64	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	1350
65	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	1351
66	Definitions of Functional Programming	1356
67	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	1362
68	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	1377
69	Computer Graphics in Java and Scala - Part 1b	1382
70	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	1392
71	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	1401
72	Game of Life - Polyglot FP - Haskell and Scala - Part 1	1403
73	Applicative Functor - Part 2	1415
74	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	1436
75	Scala 3 enum for a terser Option Monad Algebraic Data Type	1436
76	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	1474
77	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	1478
78	From Scala Monadic Effects to Unison Algebraic Effects	1479
79	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	1481
80	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	1483
81	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	1498
82	Computer Graphics in Java and Scala - Part 1	1509
83	The Expression Problem Part 1	1513
84	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	1549
85	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1554
86	Scala Left Fold Parallelisation - Three Approaches	1624
87	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	1737
88	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	1758
89	AI Concepts - MCP Neurons	1767
90	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	1780
91	Abstracting over Execution with Higher Kinded Types, and how to remain Purely Functional	1787
92	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	1804
93	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	1877
94	Compositionality and Category Theory	1878
95	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1896
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	2049
97	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	2082
98	Point-free or Die - Tacit Programming in Haskell	2238
99	Hand Rolled Applicative User Validation Code Kata	2251
100	The Bowling Game - From Imperative to Functional Programming - Part 2	2309
101	A Sighting of filterA in Typelevel Rite of Passage	2313
102	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	2350
103	The Expression Problem Part 2	2371
104	Tagless Final Encoding - Algebras and Interpreters and also Programs	2383
105	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	2401
106	Folding Cheat Sheet #8 - Folding with monoids	2425
107	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	2516
108	Folding Cheat Sheet #3 - The universal property of fold	2640
109	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	2644
110	Function Applicative for Great Good of Leap Year Function	2792
111	Fibonacci Function Gallery - Part 1	2795
112	Folding Cheat Sheet #7 - The three duality theorems of fold	2841
113	The Functional Programming Triad of map, filter and fold	2899
114	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	3000
115	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	3088
116	Fibonacci Function Gallery - Part 2	3126
117	The Bowling Game - From Imperative to Functional Programming - Part 1	3367
118	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	3794
119	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	4380
120	Monad Laws Must Be Checked	4663
121	Folding Cheat Sheet #6 - Left and right folds and tail recursion	5299
122	The Open-Closed Principle - Part 1 - The Original Version	5456
123	N-Queens Combinatorial Puzzle meets Cats	6107
124	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	11660