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

#	Title	Views
1	Non-strict functions, bottom, and Scala by-name parameters	542
2	Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence	628
3	Year when lambda functions were introduced in various languages	631
4	De Morgan's Laws are Monoid Homomorphisms	648
5	Defining filter using (a) recursion (b) folding (c) folding with S, B and I combinators (d) folding with applicative functor and identity function	664
6	Monad as Functor with pair of Natural Transformations	664
7	Addendum to `Monads do not Compose`	681
8	Monad Transformers - Part 1	686
9	Functor Composition	693
10	The Functional Programming Triad of fold, scan and iterate	713
11	Function Composition - forward composition versus backward composition	714
12	Monads do not Compose	715
13	Ad hoc Polymorphism using Type Classes and Cats	829
14	Writer Monad for logging execution of functions	831
15	Monoids - Part 2 - With examples using Scalaz and Cats	854
16	Natural Transformations	854
17	Sequence and Traverse - Part 2	862
18	State Monad	866
19	Sequence and Traverse - Part 3	872
20	Sequence and Traverse - Part 1	876
21	Functional Effects - Part 2	886
22	Monoids - Part 1 - With examples using Scalaz and Cats	887
23	Left and Right Folds - Comparison of a mathematical definition and a programmatic one	888
24	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2	897
25	Functional Effects - Part 1	915
26	Game of Life - Polyglot FP - Haskell and Scala - Part 2	916
27	Monad Fact #2	934
28	Game of Life - Polyglot FP - Haskell and Scala - Part 3	936
29	Folding Cheat Sheet Series Titles	936
30	The aggregate function - from sequential and parallel folds to parallel aggregation	949
31	Fusing Transformations of Strict Scala Collections with Views	956
32	Monad Fact #6	956
33	Folding Unfolded - Part 4	960
34	Monad Fact #5	962
35	Function Applicative for Great Good of Palindrome Checker Function	964
36	Monad Fact #3	967
37	Functor Laws	974
38	Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1	980
39	Arrive at monads by going from composition of pure functions to composition of effectful functions	985
40	Folding Unfolded - Part 3	992
41	Applicative Functor - Part 3	993
42	‘go-to’ general-purpose sequential collections - from Java To Scala	995
43	A sighting of traverseFilter and foldMap in Practical FP in Scala	1000
44	Folding Unfolded - Part 5	1000
45	The Uniform Access Principle	1001
46	Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example	1007
47	Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms	1010
48	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4	1014
49	A sighting of sequence function in Practical FP in Scala	1021
50	Sum and Product Types - The Fruit Salad & Fruit Snack Example	1029
51	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2	1032
52	Monad Fact #4	1046
53	The Debt Metaphor - Ward Cunningham in his 2009 YouTube video	1049
54	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to Github Copilot Chat - using Scala in IntelliJ IDEA	1054
55	The Monad Fact Series	1057
56	A sighting of traverse_ in Practical FP in Scala	1066
57	Monad Fact #1	1072
58	Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala	1081
59	Applicative Functor - Part 1	1104
60	Folding Unfolded - Part 2	1111
61	Folding Unfolded - Part 1	1132
62	Kleisli Composition	1143
63	The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell	1145
64	The Sieve of Eratosthenes - Part 1	1151
65	Nat, List and Option Monoids - From scratch - Combining and Folding - An example	1170
66	Computer Graphics in Java and Scala - Part 1b	1181
67	Game of Life - Polyglot FP - Haskell and Scala - Part 1	1181
68	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3	1188
69	Definitions of Functional Programming	1192
70	Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3	1194
71	Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions	1201
72	Applicative Functor - Part 2	1206
73	Scala 3 enum for a terser Option Monad Algebraic Data Type	1220
74	Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala	1225
75	From Scala Monadic Effects to Unison Algebraic Effects	1241
76	Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity	1256
77	Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1	1263
78	The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve	1268
79	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala	1282
80	Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java	1302
81	Computer Graphics in Java and Scala - Part 1	1316
82	Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication	1324
83	The Expression Problem Part 1	1356
84	N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1	1361
85	Scala Left Fold Parallelisation - Three Approaches	1422
86	Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code'	1425
87	AI Concepts - MCP Neurons	1456
88	Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation	1524
89	Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java	1556
90	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2	1572
91	The Nature of Complexity in John Ousterhout’s Philosophy of Software Design	1643
92	The Expression Problem Part 2	1647
93	Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	1669
94	Compositionality and Category Theory	1705
95	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
96	From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example	1864
97	Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1	2010
98	Hand Rolled Applicative User Validation Code Kata	2018
99	Point-free or Die - Tacit Programming in Haskell	2061
100	ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names	2111
101	A Sighting of filterA in Typelevel Rite of Passage	2138
102	Tagless Final Encoding - Algebras and Interpreters and also Programs	2180
103	Folding Cheat Sheet #8 - Folding with monoids	2241
104	The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction	2296
105	Folding Cheat Sheet #3 - The universal property of fold	2440
106	Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold	2467
107	Fibonacci Function Gallery - Part 1	2562
108	Function Applicative for Great Good of Leap Year Function	2565
109	Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3	2576
110	The Functional Programming Triad of map, filter and fold	2609
111	Folding Cheat Sheet #7 - The three duality theorems of fold	2668
112	List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate'	2836
113	Fibonacci Function Gallery - Part 2	2894
114	Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions	3550
115	Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists	3600
116	Monad Laws Must Be Checked	3836
117	Folding Cheat Sheet #6 - Left and right folds and tail recursion	4453
118	The Open-Closed Principle - Part 1 - The Original Version	4557
119	N-Queens Combinatorial Puzzle meets Cats	4757
120	Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid	10186