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

#	Title	Loves
1	Folding Cheat Sheet #6 - Left and right folds and tail recursion	229
2	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	152
3	N-Queens Combinatorial Puzzle meets Cats	146
4	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	142
5	Definitions of Functional Programming	135
6	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	134
7	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	113
8	A Sighting of filterA in Typelevel Rite of Passage	109
9	Computer Graphics in Java and Scala - Part 1b	106
10	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	104
11	Scala Left Fold Parallelisation - Three Approaches	103
12	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	100
13	Hand Rolled Applicative User Validation Code Kata	99
14	Applicative Functor - Part 1	98
15	The Expression Problem Part 1	97
16	Scala 3 enum for a terser Option Monad Algebraic Data Type	96
17	Tagless Final Encoding - Algebras and Interpreters and also Programs	94
18	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	92
19	Computer Graphics in Java and Scala - Part 1	91
20	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	90
21	Folding Cheat Sheet #7 - The three duality theorems of fold	88
22	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	86
23	Game of Life - Polyglot FP - Haskell and Scala - Part 1	84
24	Compositionality and Category Theory	84
25	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	81
26	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	80
27	From Scala Monadic Effects to Unison Algebraic Effects	79
28	Function Applicative for Great Good of Leap Year Function	79
29	Folding Unfolded - Part 2	79
30	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	78
31	Monad Laws Must Be Checked	78
32	Monad Fact #2	76
33	The Functional Programming Triad of map, filter and fold	72
34	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	71
35	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	71
36	Applicative Functor - Part 2	71
37	A sighting of traverseFilter and foldMap in Practical FP in Scala	70
38	Applicative Functor - Part 3	70
39	Folding Unfolded - Part 1	69
40	Functor Laws	69
41	Monad Fact #1	69
42	Ad hoc Polymorphism using Type Classes and Cats	69
43	Monad Fact #6	68
44	Writer Monad for logging execution of functions	68
45	Monoids - Part 2 - With examples using Scalaz and Cats	68
46	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	68
47	Function Applicative for Great Good of Palindrome Checker Function	68
48	Kleisli Composition	67
49	Folding Cheat Sheet #3 - The universal property of fold	67
50	Game of Life - Polyglot FP - Haskell and Scala - Part 2	67
51	A sighting of traverse_ in Practical FP in Scala	67
52	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	67
53	The Expression Problem Part 2	67
54	Monoids - Part 1 - With examples using Scalaz and Cats	66
55	Sum and Product Types - The Fruit Salad & Fruit Snack Example	66
56	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	65
57	Folding Unfolded - Part 4	64
58	Game of Life - Polyglot FP - Haskell and Scala - Part 3	64
59	The Sieve of Eratosthenes - Part 1	64
60	Natural Transformations	63
61	Folding Cheat Sheet #8 - Folding with monoids	63
62	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	63
63	Sequence and Traverse - Part 3	63
64	Monad Fact #4	63
65	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	63
66	Functional Effects - Part 2	62
67	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	62
68	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	62
69	The aggregate function - from sequential and parallel folds to parallel aggregation	61
70	The Monad Fact Series	60
71	Monad Fact #3	59
72	Fusing Transformations of Strict Scala Collections with Views	59
73	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	59
74	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	59
75	The Open-Closed Principle - Part 1 - The Original Version	59
76	A sighting of sequence function in Practical FP in Scala	59
77	Folding Unfolded - Part 3	59
78	State Monad	58
79	The Uniform Access Principle	58
80	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	57
81	Monad Fact #5	57
82	Functional Effects - Part 1	55
83	Arrive at monads by going from composition of pure functions to composition of effectful functions	53
84	Sequence and Traverse - Part 2	51
85	Folding Unfolded - Part 5	50
86	‘go-to’ general-purpose sequential collections - from Java To Scala	50
87	Sequence and Traverse - Part 1	50
88	Folding Cheat Sheet Series Titles	49
89	Fibonacci Function Gallery - Part 2	47
90	Function Composition - forward composition versus backward composition	46
91	Monads do not Compose	44
92	Monad Transformers - Part 1	44
93	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	44
94	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	44
95	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	43
96	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	43
97	Year when lambda functions were introduced in various languages	43
98	Fibonacci Function Gallery - Part 1	41
99	Monad as Functor with pair of Natural Transformations	41
100	Functor Composition	40
101	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	38
102	Addendum to `Monads do not Compose`	36
103	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	35
104	De Morgan's Laws are Monoid Homomorphisms	35
105	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	35
106	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	33
107	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	33
108	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	33
109	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	29
110	Non-strict functions, bottom, and Scala by-name parameters	28
111	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	28
112	Point-free or Die - Tacit Programming in Haskell	25
113	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	22
114	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	19
115	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	15
116	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	11
117	AI Concepts - MCP Neurons	8
118	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	7
119	The Functional Programming Triad of fold, scan and iterate	7
120	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	6