117 Decks Ordered By Love Count - Lowest First - Chse one - invert order

# Title Loves  
1 AI Concepts - MCP Neurons 4  
2 Imperative Bowling Kata - 20 Years On - Delegating Menial Tasks to AI Coding Tool 'Claude Code' 5  
3 Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 2 9  
4 Combinatorial Interview Problems with Backtracking Solutions - from Procedural to Functional Programming - Part 1 14  
5 ApplicativeError functions handling and recovering from errors: A mnemonic to recall their signatures from their names 17  
6 Point-free or Die - Tacit Programming in Haskell 21  
7 Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1 23  
8 Non-strict functions, bottom, and Scala by-name parameters 24  
9 The Open-Closed Principle - Part 2 - The Contemporary Version - An Introduction 26  
10 Drawing Heighway’s Dragon - Part 3 - Simplification Through Separation of Concerns - Rotation Without Matrix Multiplication 29  
11 Folding Cheat Sheet #9 - List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate' 30  
12 De Morgan's Laws are Monoid Homomorphisms 30  
13 Drawing Heighway’s Dragon - Part 4 - Interactive and Animated Dragon Creation 30  
14 List Unfolding - 'unfold' as the Computational Dual of 'fold', and how 'unfold' relates to 'iterate' 30  
15 Drawing Heighway’s Dragon - Part 2 - Recursive Function Simplification - From 2^n Recursive Invocations To n Tail-Recursive Invocations Exploiting Self-Similarity 30  
16 Addendum to `Monads do not Compose` 32  
17 Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence 33  
18 Monad as Functor with pair of Natural Transformations 36  
19 Functor Composition 36  
20 Fibonacci Function Gallery - Part 1 37  
21 Drawing Heighway’s Dragon - Part 1 - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3 38  
22 The Nature of Complexity in John Ousterhout’s Philosophy of Software Design 39  
23 Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 2 39  
24 Monad Transformers - Part 1 39  
25 Year when lambda functions were introduced in various languages 39  
26 Monads do not Compose 39  
27 From Subtype Polymorphism To Typeclass-based Ad hoc Polymorphism - An Example 40  
28 Function Composition - forward composition versus backward composition 41  
29 Fibonacci Function Gallery - Part 2 43  
30 Folding Cheat Sheet Series Titles 43  
31 Sequence and Traverse - Part 1 45  
32 Folding Unfolded - Part 5 46  
33 ‘go-to’ general-purpose sequential collections - from Java To Scala 46  
34 Sequence and Traverse - Part 2 47  
35 Arrive at monads by going from composition of pure functions to composition of effectful functions 49  
36 Functional Effects - Part 1 50  
37 Monad Fact #5 52  
38 State Monad 53  
39 N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 2 53  
40 Side by Side - Scala and Java Adaptations of Martin Fowler’s Javascript Refactoring Example 54  
41 The Uniform Access Principle 54  
42 Folding Unfolded - Part 3 54  
43 The Open-Closed Principle - Part 1 - The Original Version 54  
44 A sighting of sequence function in Practical FP in Scala 55  
45 The aggregate function - from sequential and parallel folds to parallel aggregation 55  
46 Algebraic Data Types for Data Oriented Programming - From Haskell and Scala to Java 55  
47 The Debt Metaphor - Ward Cunningham in his 2009 YouTube video 55  
48 The Monad Fact Series 56  
49 Fusing Transformations of Strict Scala Collections with Views 56  
50 Monad Fact #3 56  
51 Functional Effects - Part 2 57  
52 Sierpinski Triangle - Polyglot FP for Fun and Profit - Haskell and Scala 58  
53 Monad Fact #4 58  
54 Folding Cheat Sheet #8 - Folding with monoids 58  
55 Game of Life - Polyglot FP - Haskell and Scala - Part 3 58  
56 N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 4 59  
57 Sequence and Traverse - Part 3 59  
58 Natural Transformations 59  
59 Scala 3 by Example - Algebraic Data Types for Domain Driven Design - Part 1 59  
60 Lambda Expressions and Java 8 - Lambda Calculus, Lambda Expressions, Syntactic Sugar, First Class Functions 60  
61 The Expression Problem Part 2 60  
62 Folding Unfolded - Part 4 60  
63 The Sieve of Eratosthenes - Part 1 60  
64 Sum and Product Types - The Fruit Salad & Fruit Snack Example 62  
65 A sighting of traverse_ in Practical FP in Scala 62  
66 Folding Cheat Sheet #3 - The universal property of fold 62  
67 Folding Cheat Sheet #5 - Folding a list right and left using Cons and Nil results in the identity and reverse functions 62  
68 Kleisli Composition 63  
69 Left and Right Folds - Comparison of a mathematical definition and a programmatic one 63  
70 Function Applicative for Great Good of Palindrome Checker Function 63  
71 Writer Monad for logging execution of functions 63  
72 Monoids - Part 1 - With examples using Scalaz and Cats 63  
73 Ad hoc Polymorphism using Type Classes and Cats 63  
74 Game of Life - Polyglot FP - Haskell and Scala - Part 2 63  
75 Monad Fact #1 64  
76 Monoids - Part 2 - With examples using Scalaz and Cats 64  
77 Functor Laws 65  
78 A sighting of traverseFilter and foldMap in Practical FP in Scala 65  
79 Folding Unfolded - Part 1 65  
80 Monad Fact #6 65  
81 Folding Cheat Sheet #2 - Programmatic and mathematical definitions of right fold and left fold 66  
82 Applicative Functor - Part 3 66  
83 The Functional Programming Triad of map, filter and fold 67  
84 Applicative Functor - Part 2 67  
85 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 68  
86 Monad Fact #2 70  
87 Monad Laws Must Be Checked 72  
88 Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Scala 74  
89 Function Applicative for Great Good of Leap Year Function 74  
90 Folding Unfolded - Part 2 75  
91 Refactoring: A First Example - Martin Fowler’s First Example of Refactoring, Adapted to Java 75  
92 From Scala Monadic Effects to Unison Algebraic Effects 76  
93 Kleisli composition, flatMap, join, map, unit - implementation and interrelation - V2 updated for Scala 3 76  
94 Game of Life - Polyglot FP - Haskell and Scala - Part 1 78  
95 Compositionality and Category Theory 81  
96 N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 3 82  
97 Folding Cheat Sheet #7 - The three duality theorems of fold 82  
98 The Functional Programming Triad of Folding, Scanning and Iteration - A first example in Scala and Haskell 84  
99 Computer Graphics in Java and Scala - Part 1 87  
100 Quicksort - a whistle-stop tour of the algorithm in five languages and four paradigms 87  
101 Tagless Final Encoding - Algebras and Interpreters and also Programs 89  
102 Scala 3 enum for a terser Option Monad Algebraic Data Type 91  
103 Applicative Functor - Part 1 91  
104 Hand Rolled Applicative User Validation Code Kata 93  
105 The Expression Problem Part 1 94  
106 Functional Core and Imperative Shell - Game of Life Example - Haskell and Scala 95  
107 The Sieve of Eratosthenes - Part 2 - Genuine versus Unfaithful Sieve 98  
108 Scala Left Fold Parallelisation - Three Approaches 98  
109 Computer Graphics in Java and Scala - Part 1b 100  
110 A Sighting of filterA in Typelevel Rite of Passage 104  
111 Folding Cheat Sheet #1 - Folding over recursively defined data structures for natural numbers and lists 108  
112 Nat, List and Option Monoids - From scratch - Combining and Folding - An example 128  
113 Definitions of Functional Programming 129  
114 Direct Style Effect Systems - The Print[A] Example - A Comprehension Aid 135  
115 N-Queens Combinatorial Puzzle meets Cats 143  
116 N-Queens Combinatorial Problem - Polyglot FP for Fun and Profit – Haskell and Scala - Part 1 147  
117 Folding Cheat Sheet #6 - Left and right folds and tail recursion 222