RogerBW's Blog

The Weekly Challenge 192: Equal Flips For All 27 November 2022

I’ve been doing the Weekly Challenges. The latest involved a binary negation and list division. (Note that this is open until 27 November 2022.)

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The Weekly Challenge 191: Large but Cute 20 November 2022

I’ve been doing the Weekly Challenges. The latest involved list sorting and permutation checking. (Note that this is open until 20 November 2022.)

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The Weekly Challenge 190: Decoding Capital 12 November 2022

I’ve been doing the Weekly Challenges. The latest involved checking capitalisation and decoding an ambiguous string. (Note that this is open until 13 November 2022.)

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The Weekly Challenge 189: Degree of Character 06 November 2022

I’ve been doing the Weekly Challenges. The latest involved filtering character lists and finding subarrays. (Note that this is open until 6 November 2022.)

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The Weekly Challenge 188: Divisible Zero 25 October 2022

I’ve been doing the Weekly Challenges. The latest involved more list searching and a variation on the greatest common divisor. (Note that this is open until 30 October 2022.)

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The Weekly Challenge 187: Magical Days Together 18 October 2022

I’ve been doing the Weekly Challenges. The latest involved date overlaps and combination searches. (Note that this is open until 23 October 2022.)

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The Weekly Challenge 186: Makeover List 14 October 2022

I’ve been doing the Weekly Challenges. The latest involved combining lists and squashing unicode characters. (Note that this is open until 16 October 2022.)

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The Weekly Challenge 185: Big MAC and Mask 06 October 2022

I’ve been doing the Weekly Challenges. The latest involved various string manipulations. (Note that this is open until 9 October 2022.)

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The Weekly Challenge 184: Split Sequence 29 September 2022

I’ve been doing the Weekly Challenges. The latest involved modifying and picking things out of sequences. (Note that this is open until 2 October 2022.)

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The Weekly Challenge 183: A Unique Date 20 September 2022

I’ve been doing the Weekly Challenges. The latest involved array comparisons and date calculations. (Note that this is open until 25 September 2022.)

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The Weekly Challenge 182: Max is Common 14 September 2022 - 2 comments

I’ve been doing the Weekly Challenges. The latest involved list searching and finding a common subpath. (Note that this is open until 18 September 2022.)

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The Weekly Challenge 181: Hot Sentence 08 September 2022

I’ve been doing the Weekly Challenges. The latest involved string splitting and data sorting. (Note that this is open until 11 September 2022.)

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The Weekly Challenge 180: Unique Trim 30 August 2022 - 4 comments

I’ve been doing the Weekly Challenges. The latest involved filtering strings and lists. (Note that this is open until 4 September 2022.)

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The Weekly Challenge 179: Spark and Spell 25 August 2022

I’ve been doing the Weekly Challenges. The latest involved ordinal numbers and Unicode generation. (Note that this is open until 28 August 2022.)

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The Weekly Challenge 178: Imaginary Date 18 August 2022

I’ve been doing the Weekly Challenges. The latest involved an unusual base representation and date calculations. (Note that this is open until 21 August 2022.)

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The Weekly Challenge 177: Damm Cyclops 11 August 2022

I’ve been doing the Weekly Challenges. The latest involved a check-digit function and more number reversals. (Note that this is open until 14 August 2022.)

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The Weekly Challenge 176: Reversible Permutations 04 August 2022

I’ve been doing the Weekly Challenges. The latest involved lots of number-string conversions. (Note that this is open until 7 August 2022.)

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The Weekly Challenge 175: Perfect Sunday 26 July 2022

I’ve been doing the Weekly Challenges. The latest involved date calculations and number theory. (Note that this is open until 31 July 2022.)

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The Weekly Challenge 174: The Rank Smell of Disarium 20 July 2022

I’ve been doing the Weekly Challenges. The latest involved disarium numbers and ranked permutations. (Note that this is open until 24 July 2022.)

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The Weekly Challenge 173: The Aesthetics of Sylvester 14 July 2022

I’ve been doing the Weekly Challenges. The latest involved more mathematical tests. (Note that this is open until 17 July 2022.)

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The Weekly Challenge 172: Partition of Five 07 July 2022

I’ve been doing the Weekly Challenges. The latest involved prime partitioning and some basic statistics. (Note that this is open until 10 July 2022.)

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The Weekly Challenge 171: First-Class Abundance 30 June 2022

I’ve been doing the Weekly Challenges. The latest involved findind odd abundant numbers and first-class functions. (Note that this is open until 3 July 2022.)

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The Weekly Challenge 170: Kronecker's Primorial 23 June 2022

I’ve been doing the Weekly Challenges. The latest involved primes and an unusual form of matrix multiplication. (Note that this is open until 26 June 2022.)

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The Weekly Challenge 169: The Brilliance of Achilles 15 June 2022

I’ve been doing the Weekly Challenges. The latest involved more numerical series. (Note that this is open until 19 June 2022.)

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The Weekly Challenge 168: At Home with the Perrins 09 June 2022

I’ve been doing the Weekly Challenges. The latest involved more furkling about with prime numbers. (Note that this is open until 12 June 2022.)

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The Weekly Challenge 167: Circling the Gamma 02 June 2022

I’ve been doing the Weekly Challenges. The latest involved circular primes and the Lanczos approximation. (Note that this is open until 5 June 2022.)

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The Weekly Challenge 166: Hexing the Directories 26 May 2022

I’ve been doing the Weekly Challenges. The latest involved word searching and directory mangling. (Note that this is open until 29 May 2022.)

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The Weekly Challenge 165: Scaling the Fits 19 May 2022

I’ve been doing the Weekly Challenges. The latest involved generating SVG and fitting lines to points. (Note that this is open until 22 May 2022.)

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The Weekly Challenge 164: Happy Palindromes 12 May 2022

I’ve been doing the Weekly Challenges. The latest involved two number-sequence tasks. (Note that this is open until 15 May 2022.)

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The Weekly Challenge 163: Sums and Sums 05 May 2022

I’ve been doing the Weekly Challenges. The latest involved various summation-like operations. (Note that this is open until 8 May 2022.)

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The Weekly Challenge 162: Playing Fair with ISBNs 28 April 2022

I’ve been doing the Weekly Challenges. The latest involved ISBN check digits and the Wheatstone-Playfair cipher. (Note that this is open until 1 May 2022.)

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The Weekly Challenge 161: Words and More Words 21 April 2022

I’ve been doing the Weekly Challenges. The latest involved word selections and manipulations. (Note that this is open until 24 April 2022.)

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The Weekly Challenge 160: Balancing Four is Magic 14 April 2022

I’ve been doing the Weekly Challenges. The latest involved English word lengths and array partitioning. (Note that this is open until 17 April 2022.)

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The Weekly Challenge 159: Farey and Moebius 07 April 2022

I’ve been doing the Weekly Challenges. The latest involved generating more sequences. (Note that this is open until 10 April 2022.)

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The Weekly Challenge 158: Prime Cuban Additives 31 March 2022

I’ve been doing the Weekly Challenges. The latest involved subsets of primes. (Note that this is open until 3 April 2022.)

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The Weekly Challenge 157: Pythagoras in Brazil 24 March 2022

I’ve been doing the Weekly Challenges. The latest involved a variety of means and more number theory. (Note that this is open until 27 March 2022.)

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The Weekly Challenge 156: Weirdly Pernicious or Perniciously Weird? 17 March 2022

I’ve been doing the Weekly Challenges. The latest involved more number-theory definitions. (Note that this is open until 20 March 2022.)

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The Weekly Challenge 155: Pisano's Fortune 10 March 2022

I’ve been doing the Weekly Challenges. The latest involved more number theory problems. (Note that this is open until 13 March 2022.)

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The Weekly Challenge 154: Missing Padovan 03 March 2022

I’ve been doing the Weekly Challenges. The latest involved permutations and primality testing. (Note that this is open until 6 March 2022.)

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The Weekly Challenge 153: Factoriality 24 February 2022

I’ve been doing the Weekly Challenges. The latest involved various progressions based on factorials. (Note that this is open until 27 February 2022.)

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The Weekly Challenge 152: Triangles, Rectangles, and Objects 17 February 2022

I’ve been doing the Weekly Challenges. The latest involved finding minimum paths and overlapping rectangles. (Note that this is open until 20 February 2022.)

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The Weekly Challenge 151: Robbing Depth 10 February 2022

I’ve been doing the Weekly Challenges. The latest involved a return to binary trees and an optimisation puzzle. (Note that this is open until 13 February 2022.)

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The Weekly Challenge 150: Square-Free Words 03 February 2022

I’ve been doing the Weekly Challenges. The latest involved a Fibonacci-like word construction and a search for square-free numbers. (Note that this is open until 6 February 2022.)

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The Weekly Challenge 149: Fibonacci Squares 27 January 2022

I’ve been doing the Weekly Challenges. The latest involved just-in-time Fibonacci and squares without repeating digits. (Note that this is open until 30 January 2022.)

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The Weekly Challenge 148: Eban, Cardano 20 January 2022 - 2 comments

I’ve been doing the Weekly Challenges. The latest involved various sorts of numerical search. (Note that this is open until 23 January 2022.)

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The Weekly Challenge 147: Truncating the Pentagon 11 January 2022

I’ve been doing the Weekly Challenges. The latest involved prime searches and pentagonal numbers. (Note that this is open until 16 January 2022.)

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The Weekly Challenge 146: Curious Prime 04 January 2022

I’ve been doing the Weekly Challenges. The latest involved prime-counting and fraction trees. (Note that this is open until 9 January 2022.)

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The Weekly Challenge 145: Tree Product 28 December 2021

I’ve been doing the Weekly Challenges. The latest involved vector multiplication and a recently-invented data structure. (Note that this is open until 2 January 2022.)

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The Weekly Challenge 144: Semiprime Ulam 21 December 2021

I’ve been doing the Weekly Challenges. The latest involved some interesting mathematical sequences. (Note that this is open until 26 December 2021.)

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The Weekly Challenge 143: Stealthy Calculator 15 December 2021

I’ve been doing the Weekly Challenges. The latest involved counting divisors and another joke sort. (Note that this is open until 19 December 2021.)

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