RogerBW's Blog

The Weekly Challenge 141: Binary and Tabular 30 November 2021

I’ve been doing the Weekly Challenges. The latest involved an unusual binary encoding and indexing into a multiplication table. (Note that this is open until 5 December 2021.)

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Perl Weekly Challenge 140: Binary and Tabular 24 November 2021

I’ve been doing the Weekly Challenges. The latest involved an unusual binary encoding and indexing into a multiplication table. (Note that this is open until 28 November 2021.)

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Perl Weekly Challenge 139: Jort Primes 18 November 2021

I’ve been doing the Weekly Challenges. The latest involved date calculations and numerical decompositions. (Note that this is open until 21 November 2021.)

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Perl Weekly Challenge 138: Split Work 12 November 2021

I’ve been doing the Weekly Challenges. The latest involved date calculations and numerical decompositions. (Note that this is open until 14 November 2021.)

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Perl Weekly Challenge 137: Long Cheryl 05 November 2021

I’ve been doing the Weekly Challenges. The latest involved date calculations and numeric palindromes. (Note that this is open until 7 November 2021.)

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Perl Weekly Challenge 136: Fibonacci Friends 29 October 2021

I’ve been doing the Weekly Challenges. The latest involved GCDs, powers of two, and an unusual numeric sequence. (Note that this is open until 31 October 2021.)

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Perl Weekly Challenge 135: Valid Middle 21 October 2021

I’ve been doing the Weekly Challenges. The latest involved digit substrings and securities validation. (Note that this is open until 24 October 2021.)

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Perl Weekly Challenge 134: Pandigital Multiplication 13 October 2021

I’ve been doing the Weekly Challenges. The latest involved pandigital numbers and multiplication tables. (Note that this is open until 17 October 2021.)

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Perl Weekly Challenge 133: Rooting the Smith 06 October 2021

I’ve been doing the Weekly Challenges. The latest involved Smith numbers and square roots. (Note that this is open until 10 October 2021.)

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Perl Weekly Challenge 132: Hash on the Mirror 02 October 2021

I’ve been doing the Weekly Challenges. The latest involved date calculations and inner joins. (Note that this is open until 3 October 2021.)

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Perl Weekly Challenge 131: Splitting and Splitting More 23 September 2021

I’ve been doing the Weekly Challenges. The latest involved splitting arrays and strings. (Note that this is open until 26 September 2021.)

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Perl Weekly Challenge 130: An Odd Tree 17 September 2021

I’ve been doing the Weekly Challenges. The latest involved more binary trees and linked lists. (Note that this is open until 19 September 2021.)

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Perl Weekly Challenge 129: Eats Roots and Lists 10 September 2021

I’ve been doing the Weekly Challenges. The latest involved more binary trees and linked lists. (Note that this is open until 12 September 2021.)

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Perl Weekly Challenge 128: Maxima and Minima 03 September 2021

I’ve been doing the Weekly Challenges. The latest involved finding submatrices and counting trains. (Note that this is open until 5 September 2021.)

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Perl Weekly Challenge 127: Disjoint Conflict 26 August 2021

I’ve been doing the Weekly Challenges. The latest involved set intersections and merging intervals. (Note that this is open until 29 August 2021.)

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Perl Weekly Challenge 126: Count Sweeper 20 August 2021

I’ve been doing the Weekly Challenges. The latest involved numbers excluding 1, and Minesweeper. (Note that this is open until 22 August 2021.)

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Perl Weekly Challenge 125: Pythagorean Diameter 11 August 2021 - 1 comment

I’ve been doing the Weekly Challenges. The latest involved Pythagorean triples and binary trees. (Note that this is open until 15 August 2021.)

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Perl Weekly Challenge 124: War Day 04 August 2021 - 4 comments

I’ve been doing the Weekly Challenges. The latest involved ASCII graphics and set partitioning. (Note that this is open until 8 August 2021.)

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Perl Weekly Challenge 123: Ugly Square 28 July 2021 - 3 comments

I’ve been doing the Weekly Challenges. The latest involved regular numbers and geometrical squareness testing. (Note that this is open until 1 August 2021.)

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Perl Weekly Challenge 122: Basketball Stream 22 July 2021 - 1 comment

I’ve been doing the Weekly Challenges. The latest involved a progressive average and additive compositions. (Note that this is open until 25 July 2021.)

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Perl Weekly Challenge 121: Travelling Bit 14 July 2021 - 6 comments

I’ve been doing the Weekly Challenges. The latest involved more binary manipulation and a traditional problem. (Note that this is open until 18 July 2021.)

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Perl Weekly Challenge 120: Swap Clock 07 July 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved more binary manipulation and analogue clocks. (Note that this is open until 11 July 2021.)

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Perl Weekly Challenge 119: Sequence Nibble 02 July 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved fake binary manipulation and an unusual number sequence. (Note that this is open until 4 July 2021.)

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Perl Weekly Challenge 118: Binary Knight 23 June 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved binary palindromes and a restricted Knight's Tour. (Note that this is open until 27 June 2021.)

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Perl Weekly Challenge 117: Missing Possibilities 16 June 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved file analysis and combinatorial explosion. (Note that this is open until 20 June 2021.)

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Perl Weekly Challenge 116: Square Sequence 10 June 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved lots of digit splitting. (Note that this is open until 13 June 2021.)

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Perl Weekly Challenge 115: Largest Chain 05 June 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved chained strings and number construction. (Note that this is open until 6 June 2021.)

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Perl Weekly Challenge 114: Going Higher 27 May 2021 - 2 comments

I’ve been doing the Perl Weekly Challenges. The latest involved unconventional solutions to numerical problems. (Note that this is open until 30 May 2021.)

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Perl Weekly Challenge 113: Represent-Recreate 19 May 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved finding constrained integer decompositions and more binary tree furkling. (Note that this is open until 23 May 2021.)

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Perl Weekly Challenge 112: Canonical Stairs 12 May 2021 - 2 comments

I’ve been doing the Perl Weekly Challenges. The latest involved path canonicalisation and numerical compositions. (Note that this is open until 16 May 2021.)

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Perl Weekly Challenge 111: Search Letters 05 May 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved search optimisations and word sorting. (Note that this is open until 9 May 2021.)

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Perl Weekly Challenge 110: Transpose Numbers 28 April 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved transpositions. (Note that this is open until 2 May 2021.)

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Perl Weekly Challenge 109: Chowla Squares 20 April 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved another numerical sequence and permutations. (Note that this is open until 25 April 2021.)

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Perl Weekly Challenge 108: Memory Bell 13 April 2021 - 3 comments

I’ve been doing the Perl Weekly Challenges. The latest involved bad things and triangular numbers. (Note that this is open until 18 April 2021.)

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Perl Weekly Challenge 107: Self-Descriptive Methods 07 April 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved several sorts of introspection. (Note that this is open until 11 April 2021.)

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Perl Weekly Challenge 106: Maximum Decimal 31 March 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved integer differences and decimal expansion. (Note that this is open until 4 April 2021.)

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Perl Weekly Challenge 105: Name Root 23 March 2021 - 2 comments

I’ve been doing the Perl Weekly Challenges. The latest involved fractional exponentiation and sweating with the oldies. (Note that this is open until 28 March 2021.)

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Perl Weekly Challenge 104: FUSC NIM 16 March 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved the Stern-Brocot sequence (which Dijkstra named "fusc") and a variant of Nim. (Note that this is open until 21 March 2021.)

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Perl Weekly Challenge 103: Playing Zodiac 10 March 2021

I’ve been doing the Perl Weekly Challenges. The latest involved lots of modulus arithmetic. (Note that this is open until 14 March 2021.)

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Perl Weekly Challenge 102: Rare Hash 03 March 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved an obscure class of number and a self-consistent string format. (Note that this is open until 7 March 2021.)

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Perl Weekly Challenge 101: Spiral Origin 24 February 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved packing an array and a standard geometry problem. (Note that this is open until 28 February 2021.)

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Perl Weekly Challenge 100: Time Triangle 18 February 2021

I’ve been doing the Perl Weekly Challenges. The latest involved converting time formats and more tree traversal. (Note that this is open until 21 February 2021.)

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Perl Weekly Challenge 99: Unique Match 10 February 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved globbing and building sub-sequences. (Note that this is open until 14 February 2021.)

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Perl Weekly Challenge 98: Insert N 05 February 2021

I’ve been doing the Perl Weekly Challenges. The latest involved reading tiny chunks from a file and searching a list. (Note that this is open until 7 February 2021.)

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Perl Weekly Challenge 97: Caesar Substrings 27 January 2021

I’ve been doing the Perl Weekly Challenges. The latest involved implementing the Caesar cipher and breaking up binary strings. (Note that this is open until 31 January 2021.)

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Perl Weekly Challenge 96: Reverse Distance 22 January 2021

I’ve been doing the Perl Weekly Challenges. The latest involved reversing words in a string and calculating Levenshtein distance. (Note that this is open until 24 January 2021.)

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Perl Weekly Challenge 95: Palindrome Stack 14 January 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved testing for palindromic numbers and building a stack class. (Note that this is open until 17 January 2021.)

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Perl Weekly Challenge 94: Binary Anagrams 05 January 2021 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved grouping anagrams and more furkling with binary trees. (Note that this is open until 10 January 2021.)

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Perl Weekly Challenge 93: Max Path 30 December 2020

I’ve been doing the Perl Weekly Challenges. The latest involved colinear points and binary tree sums. (Note that this is open until 3 January 2021.)

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Perl Weekly Challenge 92: Isomorphic Interval 25 December 2020

I’ve been doing the Perl Weekly Challenges. The latest involved string isomorphism and interval merging. (Note that this is open until 27 December 2020.)

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Perl Weekly Challenge 91: Number Jump 18 December 2020

I’ve been doing the Perl Weekly Challenges. The latest involved breaking down numbers and following sequences. (Note that this is open until 20 December 2020.)

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Perl Weekly Challenge 90: Ethiopian DNA 10 December 2020 - 3 comments

I’ve been doing the Perl Weekly Challenges. The latest involved base sequences and a binary multiplication system. (Note that this is open until 13 December 2020.)

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Perl Weekly Challenge 89: magic sum 05 December 2020

I’ve been doing the Perl Weekly Challenges. The latest involved GCDs and magic squares. (Note that this is open until 6 December 2020.)

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Perl Weekly Challenge 88: Spiral Product 28 November 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved multiplications and spirals. (Note that this is open until 29 November 2020.)

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Perl Weekly Challenge 87: Consecutive Rectangles 19 November 2020

I’ve been doing the Perl Weekly Challenges. The latest involved list searches and matrices. (Note that this is open until 22 November 2020.)

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Perl Weekly Challenge 86: Sudoku Difference 12 November 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved list searches and combinatorial explosions. (Note that this is open until 15 November 2020.)

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Perl Weekly Challenge 85: Triplet Power 05 November 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved searching combinations and integer powers. (Note that this is open until 8 November 2020.)

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Perl Weekly Challenge 84: Reverse squares 28 October 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved reversing integers and a two-dimensional search. (Note that this is open until 1 November 2020.)

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Perl Weekly Challenge 83: Length and Inversion 23 October 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved string manipulation and a numerical search. (Note that this is open until 25 October 2020.)

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A test harness for my Discourse plugin 19 October 2020

I have ended up maintaining a plugin for Discourse. As I got it, it had no tests. Fixing that was fun.

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Perl Weekly Challenge 82: Interleave Factors 14 October 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved common factors and string searches. (Note that this is open until 12 October 2020.)

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Perl Weekly Challenge 81: Base Frequency 07 October 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved substrings and word frequencies. (Note that this is open until 11 October 2020.)

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Perl Weekly Challenge 80: missing numbers and jealous neighbours 29 September 2020 - 1 comment

I’ve been doing the Perl Weekly Challenges. The latest involved missing numbers and more ranking of neighbours. (Note that this is open until 4 October 2020.)

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