120 Decks Ordered By View Count - Highest First - Chse one - invert order

#	Title	Views
1	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	10185
2	N-Queens Combinatorial Puzzle meets Cats	4755
3	The Open-Closed Principle - Part 1 - The Original Version	4556
4	Folding Cheat Sheet #6 - Left and right folds and tail recursion	4453
5	Monad Laws Must Be Checked	3836
6	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	3600
7	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	3550
8	Fibonacci Function Gallery - Part 2	2894
9	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	2836
10	Folding Cheat Sheet #7 - The three duality theorems of fold	2667
11	The Functional Programming Triad of map, filter and fold	2609
12	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	2576
13	Function Applicative for Great Good of Leap Year Function	2565
14	Fibonacci Function Gallery - Part 1	2562
15	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	2467
16	Folding Cheat Sheet #3 - The universal property of fold	2440
17	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	2296
18	Folding Cheat Sheet #8 - Folding with monoids	2241
19	Tagless Final Encoding - Algebras and Interpreters and also Programs	2180
20	A Sighting of filterA in Typelevel Rite of Passage	2137
21	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	2111
22	Point-free or Die - Tacit Programming in Haskell	2060
23	Hand Rolled Applicative User Validation Code Kata	2018
24	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	2009
25	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	1863
26	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	1850
27	Compositionality and Category Theory	1705
28	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	1668
29	The Expression Problem Part 2	1646
30	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1643
31	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	1571
32	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	1555
33	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	1524
34	AI Concepts - MCP Neurons	1456
35	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	1425
36	Scala Left Fold Parallelisation - Three Approaches	1422
37	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	1361
38	The Expression Problem Part 1	1356
39	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1324
40	Computer Graphics in Java and Scala - Part 1	1315
41	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	1302
42	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	1282
43	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	1268
44	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	1262
45	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	1256
46	From Scala Monadic Effects to Unison Algebraic Effects	1241
47	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	1225
48	Scala 3 enum for a terser Option Monad Algebraic Data Type	1220
49	Applicative Functor - Part 2	1206
50	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	1201
51	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	1194
52	Definitions of Functional Programming	1192
53	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	1188
54	Computer Graphics in Java and Scala - Part 1b	1181
55	Game of Life - Polyglot FP - Haskell and Scala - Part 1	1180
56	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	1170
57	The Sieve of Eratosthenes - Part 1	1151
58	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	1145
59	Kleisli Composition	1143
60	Folding Unfolded - Part 1	1132
61	Folding Unfolded - Part 2	1111
62	Applicative Functor - Part 1	1104
63	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	1081
64	Monad Fact #1	1072
65	A sighting of traverse_ in Practical FP in Scala	1066
66	The Monad Fact Series	1056
67	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	1054
68	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1049
69	Monad Fact #4	1046
70	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	1032
71	Sum and Product Types - The Fruit Salad & Fruit Snack Example	1029
72	A sighting of sequence function in Practical FP in Scala	1021
73	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	1014
74	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	1010
75	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	1007
76	The Uniform Access Principle	1001
77	A sighting of traverseFilter and foldMap in Practical FP in Scala	1000
78	Folding Unfolded - Part 5	1000
79	‘go-to’ general-purpose sequential collections - from Java To Scala	995
80	Applicative Functor - Part 3	993
81	Folding Unfolded - Part 3	992
82	Arrive at monads by going from composition of pure functions to composition of effectful functions	985
83	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	980
84	Functor Laws	974
85	Monad Fact #3	967
86	Function Applicative for Great Good of Palindrome Checker Function	964
87	Monad Fact #5	962
88	Folding Unfolded - Part 4	960
89	Monad Fact #6	956
90	Fusing Transformations of Strict Scala Collections with Views	956
91	The aggregate function - from sequential and parallel folds to parallel aggregation	949
92	Game of Life - Polyglot FP - Haskell and Scala - Part 3	936
93	Folding Cheat Sheet Series Titles	935
94	Monad Fact #2	934
95	Game of Life - Polyglot FP - Haskell and Scala - Part 2	916
96	Functional Effects - Part 1	915
97	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	897
98	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	888
99	Monoids - Part 1 - With examples using Scalaz and Cats	887
100	Functional Effects - Part 2	886
101	Sequence and Traverse - Part 1	876
102	Sequence and Traverse - Part 3	872
103	State Monad	866
104	Sequence and Traverse - Part 2	862
105	Monoids - Part 2 - With examples using Scalaz and Cats	854
106	Natural Transformations	854
107	Writer Monad for logging execution of functions	831
108	Ad hoc Polymorphism using Type Classes and Cats	829
109	Monads do not Compose	715
110	Function Composition - forward composition versus backward composition	714
111	The Functional Programming Triad of fold, scan and iterate	713
112	Functor Composition	692
113	Monad Transformers - Part 1	686
114	Addendum to `Monads do not Compose`	681
115	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	664
116	Monad as Functor with pair of Natural Transformations	663
117	De Morgan's Laws are Monoid Homomorphisms	648
118	Year when lambda functions were introduced in various languages	631
119	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	628
120	Non-strict functions, bottom, and Scala by-name parameters	542