Perl Weekly - all the articles published by Laurent Rosenfeld

2017.05.26 in #305 The 'Think Perl 6' book is out
The Think Perl 6 book is now officially out (see oreilly.com). O'Reilly received it from the printer this week and started shipping it out to retailers.
It is also available in PDF format as a free book under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
Readers are free to copy and distribute the text; they are also free to modify it, which allows them to adapt the book to different needs, and to help develop new material. The LaTeX source for this book is in this Github repository.
2019.04.03 in #402 Perl Weekly Challenge, First Week
Laurent Rosenfeld shares his thoughts on the first weekly challenge.
2019.04.07 in #402 Perl 6 Weekly challenge - week 2
2019.04.28 in #405 Perl Weekly Challenge # 5: Anagrams
Laurent Rosenfeld shares his solution with benchmark data.
2019.05.01 in #406 Perl Weekly Challenge # 6: Compact Number Ranges
One of the consistent blogger for Perl Weekly Challenger. Here Laurent shares his ideas and thoughts with regards to his solution for Challenge 006.
2019.05.04 in #406 Perl Weekly Challenge # 6: Ramanujan's Constant
Laurent explains his solution to the second question about Ramanujan's Constant.
2019.05.12 in #407 Perl Weekly Challenge # 7: Niven Numbers and Word Ladders
2019.05.18 in #408 Perl Weekly Challenge # 8: Perfect Numbers and Centered Output
Laurent not only discuss the solution also shares different approach to the same challenge. You will find the solution in both #Perl5 and #Perl6.
2019.05.24 in #409 Perl Weekly Challenge # 9: Squares and Rankings
As always the case with Laurent, you are served with plenty of choices. Each blog of him can easily be turned into chapter in book. Who knows one day, with his permission, I might do that.
2019.05.26 in #409 Perl Weekly Challenge # 9: Square Numbers and Functional Programming in Perl
Laurent wrote another blog talking about the use Functional Programming to solve the challenge. Highly Recommended.
2019.05.29 in #410 Perl Weekly Challenge # 10: Roman Numerals and the Jaro-Winkler Distance
As always, Laurent, shared plenty of variations in his approach. It is always fun reading his blog. He always presents his solutions in both Perl5 and Perl6.
2019.06.05 in #411 Perl Weekly Challenge # 11: Fahrenheit Celsius and Identity Matrix
Laurent's solutions is always looked up by many members as reference point. He is so comfortable with #Perl5 and #Perl6. I can't tell his favourite of both.
2019.06.12 in #412 Perl Weekly Challenge # 12: Euclid's Numbers and Directories
Laurent's blog ideal for anyone wants to learn Perl6. Such a brilliant writing any Perl5 hacker can follow easily.
2019.06.19 in #413 Perl Weekly Challenge # 13: Fridays and Mutually Recursive Subroutines
Laurent's blog is always special and very informative. He not just talks about the challenge solution but also takes you to the edge case and shows how to deal with it.
2019.06.29 in #414 Perl Weekly Challenge # 14: Van Eck's Sequence and US States
2019.07.03 in #415 Perl Weekly Challenge # 15: Strong and Weak Primes and Vigenère Encryption
Laurent is unmatchable in his analysis of challenges. He is great in presenting result of his analysis. At the end it looks so simple and easy.
2019.07.06 in #415 Functional Programming in Perl: Strong and Weak Primes (Perl Weekly Challenge)
Functional programming became a special feature of Laurent blog now a days. I have learnt a lot by reading his blog.
2019.07.08 in #416 Perl Weekly Challenge #16: Pythagoras Pie
Laurent's blog is always fun to read and takes up plenty of time to understand as it covers so many different aspects of the given task.
2019.07.14 in #416 Perl Weekly Challenge #16: Bitcoin Addresses
Laurent's blog about Bitcoin address task is again full of ideas. Read if you want to know more.
2019.07.15 in #417 Perl Weekly Challenge # 17: Ackermann Function and Parsing URLs
You must checkout Perl6 solution of Ackermann function task. Even if you don't know Perl6, you can still enjoy it.
2019.07.24 in #418 Perl Weekly Challenge # 18: Longest Common Substrings, Priority Queues, and a Functional Object System
Laurent starting with simple solution and then moving on sharing String::LCSS solution. The best part of the blog is how he wrote Perl5 solution mimicking Perl6.
2019.07.26 in #418 Perl Weekly Challenge # 18: Priority Queues and Binary Heaps In Perl 6
In this blog, Laurent discussing how Binary Heap can help to solve the Priority Queues task. This itself can be passed the best guide for Binary Heap. Great writing skill, I must admit.
2019.07.29 in #419 Perl Weekly Challenge # 19: Weekends and Wrapping Lines
Laurent back with this intensive analysis. You must checkout his blog first.
2019.08.08 in #420 Perl Weekly Challenge # 20: Split String on Character Change and Amicable Numbers
Laurent is on the case without any issues, following his trademark. He always starts with basic solution and improves the code as he progress further. The journey appears to be so smooth that you wouldn't even realise.
2019.08.13 in #421 Perl Weekly Challenge # 21: Euler's Number and URL Normalizing
Laurent blog starts with Perl6 solution to calculate the value of e, followed by Perl5 equivalent. I was bowled by the Perl5 solution. You must check out.
2019.08.21 in #422 Perl Weekly Challenge # 22: Sexy Prime Pairs and Compression Algorithm
Laurent again showing his expertise in Perl5 and Perl6 with such an ease. It is always enjoyable reading his blog.
2019.08.26 in #423 Perl Weekly Challenge # 23: Difference Series and Prime Factorization
Laurent is one of the busiest members of the team. He not only just does weekly challenge in Perl5 and Perl6 along with blog but also reviews other members Perl6 solutions every week.
2019.09.03 in #424 Perl Weekly Challenge # 24: Smallest Script and Inverted Index
Laurent once again, shared deep analysis of Inverted Index. Highly Recommended.
2019.09.10 in #425 Perl Weekly Challenge 25: Pokémon Sequence and Chaocipher
Laurent would never let you down. This time also he came up with ground up solutions.
2019.09.16 in #426 Perl Weekly Challenge 26: Common Letters and Mean Angles
Laurent solution to the Mean Angles task is amazingly easy and simple to follow with unit test.
2019.09.29 in #427 Perl Weekly Challenge 27: Intersection Point and Historical Values
Laurent's blog is like reading a book, comprehensive analysis of each tasks.
2019.10.05 in #428 Perl Weekly Challenge 28: File Type and Digital Clock
Laurent shared nice little background of file type checking. I liked how he dealt in Perl6. You can't afford to miss it.
2019.10.13 in #429 Perl Weekly Challenge 29: Brace Expansion and Calling C Code
Laurent blog is something you can't afford to miss. You must checkout.
2019.10.14 in #430 Perl Weekly Challenge 30: Sunday Christmas and Triplets
Please checkout the Raku magic to solve the Christmas date task. You will be amazed.
2019.10.24 in #431 Perl Weekly Challenge 31: Illegal Division by Zero and Dynamic Variables
Laurent blog, as always, started with easy one-liners solution then expanded into full solution. Highly Recommended.
2019.10.30 in #432 Perl Weekly Challenge 32: Word Histogram and ASCII Bar Chart
Laurent special this week is Raku solution imho. Please check out.
2019.11.06 in #433 Perl Weekly Challenge 33: Count letters and Multiplication Tables
I really enjoyed reading Laurent's blog. Being an author, he knows how to build story around the solution.
2019.11.11 in #434 Perl Weekly Challenge 34: Array and Hash Slices and Dispatch Tables
If you think, you know Array/Hash slice then I suggest you read the blog as Laurent tends to take you on fun journey every week.
2019.11.22 in #435 Perl Weekly Challenge 35: Binary Encoded Morse Code
Laurent is absolute genious when it comes to Perl and Raku. Must Read.
2019.12.01 in #436 Perl Weekly Challenge 36: Vehicle Identification Numbers (VIN) and the Knapsack Problem
Reading Laurent's blog makes you want more. I can't stop reading his blog again and again.
2019.12.07 in #437 Perl Weekly Challenge 37: Week Days in Each Month and Daylight Gain/loss
I am a big fan of Laurent writing skill and his analytical skill. He is simply the best.
2019.12.12 in #438 Day 12 - nth Order Difference Series
2019.12.15 in #438 Perl Weekly Challenge 38: Date Finder and Word Game
Laurent used Raku Grammar to solve this week challennge. Please checkout.
2019.12.19 in #439 Perl Weekly Challenge # 39: Guest House and Reverse Polish Notation
Laurent has been contributing to the weekly challenge for a long. The quality is always top level.
2019.12.26 in #440 Perl Weekly Challenge 40: Multiple Arrays Content and Sublist Sorting
Laurent blog is a mini book in itself. Highly Recommended.
2020.01.01 in #441 Perl Weekly Challenge 41: Attractive Numbers and Leonardo Numbers
Laurent used lazy list of Raku to solve Attractive number task. You will find plenty more magic like this.
2020.01.05 in #441 Raku Review - Perl Weekly Challenge - 040
Raku Solutions Review by Laurent Rosenfeld.
2020.01.08 in #442 Perl Weekly Challenge 42: Octal Numbers and Balanced Parentheses
Laurent do not need any introduction. If you are looking for analytical explanation then please do check out the blog.
2020.01.10 in #442 Think Raku - Released
Laurent announced updated version of original book "Think Perl6" but since Perl 6 has been renamed Raku, they have also changed the title of the book.
2020.01.12 in #442 Raku Review - Perl Weekly Challenge - 041
Raku Solutions Review by Laurent Rosenfeld.
2020.01.19 in #443 Perl Weekly Challenge 43: Olympic Rings and Self-Descripting Numbers
Laurent is one of the highly regarded member. You get to learn so much about the subject.
2020.01.20 in #443 Raku Review - Perl Weekly Challenge - 042
Raku Solutions Review by Laurent Rosenfeld.
2020.01.26 in #444 Perl Weekly Challenge 44: Only 100, Please, and Make it $200
2020.02.01 in #445 Perl Weekly Challenge 45: Square Secret Code and Source Dumper
Laurent always comes up with plenty of solutions. Highly Recommended.
2020.02.09 in #446 Perl Weekly Challenge 46: Garbled Message and Room Open
Laurent analysis of the room task really made my day. Highly Recommended.
2020.02.20 in #448 Perl Weekly Challenge 48: Survivor and Palindrome Dates
Laurent shared generic survivor task solution. You won't get bored of reading his blog.
2020.02.28 in #449 Perl Weekly Challenge: Smallest Multiple and LRU Cache
Laurent once again came up with Functional Programming to solve the LRU cache task. Hight Recommended.
2020.03.08 in #450 Perl Weekly Challenge: Merge Inrervals and Noble Numbers
Laurent shared the power of Raku when solving Noble number task.
2020.03.15 in #451 Perl Weekly Challenge: sums
For the first time, Laurent only managed to do 3 Sum task in Raku.
2020.03.22 in #452 Perl Weekly Challenge: Stepping Numbers and Lucky Winner
As always, if you want to learn new interesting feature, don't forget to checkout his blog. Must Read.
2020.03.28 in #453 Perl Weekly Challenge 53: Rotate Matrix and Vowel Strings
Laurent shared the trick to solve the rotate matrix.
2020.03.29 in #453 Raku Review - Perl Weekly Challenge - 052
Raku Solutions Review by Laurent Rosenfeld.
2020.04.04 in #454 Perl Weekly Challenge 54: k-th Permutation Sequence and the Collatz Conjecture
Laurent solved the challenge without the help of CPAN. Highly Recommended.
2020.04.12 in #455 Perl Weekly Challenge 55: Binary Numbers and Wave Arrays
Laurent's make difficult task looks simple. Checkout his blog to find out yourself.
2020.04.16 in #456 Revisiting the Collatz Sequence (PWC 54)
Laurent revisited his work on Collatz Sequence and shared his findings.
2020.04.18 in #456 Perl Weekly Challenge # 56: Diff-k and Path Sum
Laurent's analytics discussion is unmatchable. Highly Recommended.
2020.04.22 in #457 Raku Review - Perl Weekly Challenge - 054
Raku Solutions Review by Laurent Rosenfeld.
2020.04.26 in #457 Perl Weekly Challenge 57: Tree Inversion and Shortest Unique Prefix
The best part to me was "Tree Inversion Using a Flat Array". A very interesting approach.
2020.05.01 in #458 # Perl Weekly Challenge 58: Compare Versions and Ordered Lineup
Laurent's solution to the compare version is really cool in my opinion.
2020.05.07 in #459 Raku Review - Perl Weekly Challenge - 056
Raku Solutions Review by Laurent Rosenfeld.
2020.05.07 in #459 Raku Review - Perl Weekly Challenge - 057
Raku Solutions Review by Laurent Rosenfeld.
2020.05.10 in #459 Perl Weekly Challenge 59: Linked Lists and Bit Sums
As always Laurent shared multiple solutions to each task. Highly Recommended.
2020.05.17 in #460 Perl Weekly Challenge 60: Excel Columns and Find Numbers
You don't want to miss the Excel Column solution by Laurent. Mind Blowing.
2020.05.21 in #461 Perl Weekly Challenge 61: Max Subarray Product and IP Address Partition
Laurent shared few Raku magics in his blog. You don't want to missed them.
2020.05.31 in #462 Perl Weekly Challenge 62: Sort Email Addresses
Laurent shared various approach to solve Sort Email Addresses task in Perl and Raku.
2020.06.02 in #463 Perl Weekly Challenge 63: Last Word and Rotate String
Laurent took the easiest route to solve Last Word task, yet very elegant as always.
2020.06.14 in #464 Perl Weekly Challenge 64: Minimum Sum Path and Word Break
Laurent shared the power of Perl and Raku equally.
2020.06.28 in #466 Perl Weekly Challenge 66: Divide Integers and Power Integers
Laurent shared his Raku magic one more time.
2020.07.04 in #467 Perl Weekly Challenge 67: Number Combinations and Letter Phone
I simply love the varieties of solutions both in Perl and Raku.
2020.07.06 in #467 Raku Review - Perl Weekly Challenge - 058
Raku Solutions Review by Colin Crain.
2020.07.18 in #469 Perl Weekly Challenge 69: Strobogrammatic Numbers and 0/1 Strings
Laurent analysis of 0/1 String task is quite interesting. Checkout yourself.
2020.07.26 in #470 Perl Weekly Challenge 70: Character Swapping and Gray Code Sequence
Thanks Laurent for sharing postcircumfix example.
2020.08.02 in #471 Perl Weekly Challenge 71: Peak Elements and Trim Linked List
Laurent showing us the power of gather in Raku.
2020.08.09 in #472 Perl Weekly Challenge 72: One-Liners for Trailing Zeros and Line Ranges
Laurent went beyond solving the task and shared the various different aspects of the task.
2020.08.11 in #473 Perl Weekly Challenge 73: Min Sliding Window and Smallest Neighbor
Laurent used gather/take combination to solve Min Sliding Window task. Interesting Take.
2020.08.23 in #474 Perl Weekly Challenge 74: Majority Element and FNR Character
Like always, Laurent packed plenty of Raku magic in his blog.
2020.08.28 in #475 Perl Weekly Challenge 75: Coin Sums and Largest Rectangle Histogram
Laurent special skill of breaking task into smaller task makes difficult task looks easy. He did it one more time.
2020.09.07 in #476 Perl Weekly Challenge 76: Letter Grid
Laurent skipped "Prime Sum" task because of lack of time. However he did manage to get the "Word Search" task done on time.
2020.09.10 in #477 Perl Weekly Challenge: Fibonacci Sum and Lonely X
Laurent as always discussed the nitty-gritty on Fibonacci sum task.
2020.09.16 in #478 Perl Weekly Challenge 78: Leader Element and Left Rotation
Laurent as always made the task looks like school boy task. Perl and Raku solutions are equally cool.
2020.09.23 in #479 Perl Weekly Challenge 79: Count Set Bits and Trapped Rain Water
As always, Laurent mix bag of Perl and Raku is worth reading. Highly Recommended.
2020.09.29 in #480 Perl Weekly Challenge 80: Smallest Positive Number Bits and Count Candies
Check out this mix of Perl and Raku solutions.
2020.10.11 in #481 Perl Weekly Challenge 81: Frequency Sort
Laurent shared Frequency Sort task analysis.
2020.10.18 in #482 Perl Weekly Challenge 82: Common Factors
Laurent continued his weekly blog without interruption,
2020.10.24 in #483 Perl Weekly Challenge 83: Words Length and Flip Array
Laurent came up with yet another gem of solutions.
2020.10.27 in #484 Perl Weekly Challenge 84: Reverse Integer and Find Square Matrices
Laurent's blog has been inspirational to all new members of PWC. Great work, keep it up.
2020.11.07 in #485 Perl Weekly Challenge 85: Triplet Sum and Power of Two Integers
Laurent, as always, shows the power of Perl and Raku in great detail handling both tasks of the week.
2020.11.15 in #486 Perl Weekly Challenge 86: Pair Differences and Sudoku Puzzles
Laurent's explanation of the Sudoku puzzle is the best introduction to the problem.
2020.11.19 in #487 Perl Weekly Challenge 87: Longest Consecutive Sequences and Largest Rectangle
Laurent's thorough discussion about different types of sorting. You even get to know about Functional programming.
2020.11.25 in #488 Perl Weekly Challenge 88: Array of Products and Spiral Matrices
Laurent writing Raku first then porting the code to Perl is really cool. His contributions in Perl and Raku are equally great.
2020.12.06 in #489 Perl Weekly Challenge 89: GCD Sums and Magic Squares
Laurent is one of the few who have been associated with the weekly challenge from day one and you see he is still as refresh as he was on day one. Unmatched skill.
2020.12.08 in #490 Perl Weekly Challenge 90: DNA Sequence and Ethiopian Multiplication
Laurent once again came up with compact solutions. You even get a bonus Scala solution this time.
2020.12.15 in #491 Perl Weekly Challenge 91: Count Numbers and Jump Games
Enjoy the flavour of Scala along with Perl and Raku. 3-in-1 blog post, great.
2020.12.27 in #492 Perl Weekly Challenge 92: Isomorphic Strings and Insert Intervals
Like always, Laurent discuss all the possible ways of dealing with the task. Must Read.
2021.01.02 in #493 Perl Weekly Challenge 93: Max Points and Sum Path
Laurent is never short of choices. Every task has multiple choices for you to see the differences. Must Read.
2021.01.06 in #494 Perl Weekly Challenge 94: Group Anagrams and Binary Tree to Linked List
Laurent has yet another detailed descriptive blog post for both Perl and Raku. Highly Recommended.
2021.01.14 in #495 Perl Weekly Challenge 95: Palindrome Numbers and Demo Stack
Thank you, Laurent for being a great supporter. As always, he showed both functional and object oriented approaches.
2021.01.22 in #496 Perl Weekly Challenge 96: Reverse Words and Edit Distance (and Decorators in Perl)
Laurent is teaching us the decorator pattern in Perl this week. You don't want to miss this.
2021.01.31 in #497 Perl Weekly Challenge 97: Caesar Cipher and Binary Substrings
Laurent's blog is, as always, full of magic - whether it is Perl or Raku.
2021.02.08 in #498 Perl Weekly Challenge 98: Read N-Characters and Search Insert Position
A last-minute submission by Laurent is well worth the wait. Plenty of choices dealing with the readN() task.
2021.02.12 in #499 Perl Weekly Challenge 99: Pattern Match and Unique Subsequence
Laurent's discussion of his Perl and Raku solutions contains great inside stories from both worlds. Highly Recommended.
2021.02.21 in #500 Perl Weekly Challenge 100: Fun Time and Triangle Sum
Laurent's modular approach is always very elegant. Thanks for sharing.
2021.03.16 in #504 Perl Weekly Challenge 104: Fusc Sequence and NIM Game
Laureent is back with a bang and this time you get guest contributions too.
2021.03.26 in #505 Perl Weekly Challenge 105: Nth Root and The Name Game
Laurent kept it simple and easy this time. We even got a bonus solution in Python.
2021.04.02 in #506 Perl Weekly Challenge 106: Maximum Gap and Decimal String
Laurent showing his expertise in multiple languages in this blog post. Incredible.
2021.04.05 in #507 Perl Weekly Challenge 107: Self-Descripting Numbers and List Methods
Laurent presented a complete solution for the Self-descriptive numbers task, you don't want to miss out.
2021.04.13 in #508 Perl Weekly Challenge 108: Locate Memory and Bell Numbers
Laurent is on a mission to show his skill. Plenty of choices of languages can be found in this blog post.
2021.04.21 in #509 Perl Weekly Challenge 109: Chowla Numbers and Four Square Puzzle
Laurent seems to read my mind, smart brain. He correctly guessed that the output is not part of the requirements. Thank You.
2021.05.01 in #510 Perl Weekly Challenge 110: Valid Phone Numbers and Transposed File
Laurent has been consistently sharing solutions in more than just Perl and Raku. Thanks for sharing.
2021.05.05 in #511 Perl Weekly Challenge 111: Search Matrix and Ordered Letters
As always Lauarent came up a with detailed analysis and presented his solutions in Perl and Raku.
2021.05.13 in #512 Perl Weekly Challenge 112: Canonical Path and Climb Stairs
Laurent shared something new - try-steps for the Climb Stairs task. Thanks for sharing the magic of Raku.
2021.05.26 in #514 Perl Weekly Challenge 114: Next Palindrome Number and Higher Integer Set Bits
For me the USP of Laurent's blog post is to see the comparison of his Perl and Raku implementations. You don't want to miss the discussion.
2021.06.12 in #516 Perl Weekly Challenge 116: Number Sequence and Sum of Squares
Laurent's blog is always very special as there are plenty of ideas to explore. Please check out the Raku tricks.
2021.06.19 in #517 Perl Weekly Challenge 117: Missing Row and Possible Paths
Laurent presented us with short and precise solutions this week, specially the solution to the Find Possible Paths task. He made it look so simple. Great work, thanks for sharing.
2021.06.23 in #518 Perl Weekly Challenge 118: Binary Palindrome
I really admire the dedication of Laurent as he managed to find time to solve the task. Well done.
2021.07.01 in #519 Perl Weekly Challenge 119: Swap Nibbles and Sequence without 1-on-1
2021.07.09 in #520 Perl Weekly Challenge 120: Swap Odd/Even Bits and Clock Angle
Laurent never misses an opportunity to show off his Raku knowledge. I have learnt a lot from him. Keep sharing.
2021.07.17 in #521 Perl Weekly Challenge 121: Invert Bit
Laurent only attempted the Invert Bit task as he was too busy with his other commitments. Glad he shared the blog post with us. Thanks.
2021.07.20 in #522 Perl Weekly Challenge 122: Average of Stream and Basketball Points
2021.07.31 in #523 Perl Weekly Challenge 123: Ugly Numbers and Square Points
Laurent's solution to the Ugly Numbers task is very impressive. Thank you for sharing your experience with us.
2021.08.03 in #524 Perl Weekly Challenge 124: Happy Women Day and Tug of War
Laurent seems to be on the loose this week. He gave a tough fight to Abigail with his guest contributions to task #1. Having said that, his Perl solution to Tug of War is something to watch out for. You don't want to miss it.
2021.08.15 in #525 Perl Weekly Challenge 125: Pythagorean Triples
Laurent had a busy week, but still managed to get one task done at least. I salute his dedication. Keep it up.
2021.08.19 in #526 Perl Weekly Challenge 126: Count Numbers and Minesweeper Game
Laurent has been sharing Perl and Raku solutions every week for months now. If you ever want to learn how to port a Raku solution to Perl then this is the best place to look. Thanks for sharing.
2021.08.29 in #527 Perl Weekly Challenge 127: Disjoint Sets and Conflict Intervals
Cute and short solutions in Perl and Raku. Thanks for sharing.
2021.09.16 in #530 Perl Weekly Challenge 130: Odd Number and Binary Search Tree
Laurent's use of a Bag to solve the Odd Number task gives us a clean one-liner. For BST, a recursive function is used.
2021.09.24 in #531 Perl Weekly Challenge 131: Consecutive Arrays
Just one solution this week, but very simple and easy to follow.
2021.10.01 in #532 Perl Weekly Challenge 132: Mirror Dates and Hash Join
Laurent making good use of Raku's power to deal with dates. As bonus we also get the Perl equivalent. Cool solutions.
2021.10.08 in #533 Perl Weekly Challenge 133: Integer Square Roots and Smith Numbers
Laurent's blog is always full of gems, with plenty of alternate solutions. Thanks for your support and contribution.
2021.10.15 in #534 Perl Weekly Challenge 134: Pandigital Numbers and Distinct Term Count
Laurent making good use of a recursive function to solve the Pandigital Numbers task. The end result is sleek and beautiful.
2021.10.20 in #535 Perl Weekly Challenge 135: Middle 3-Digits and Validate SEDOL
Laurent making good use of Raku power when dealing with weekly task. His Perl solutions also looks like Raku at times. Keep it; up great work.
2021.10.27 in #536 Perl Weekly Challenge 136: Two Friendly and Fibonacci Sequence
Laurent delivers solutions in both Perl and Raku with plenty of details to follow. It is always a pleasure to read his blog. Keep up the great work.
2021.11.01 in #537 Perl Weekly Challenge 137: Long Year and Lychrel Number
A unique approach to the Long Year task. Great discussion. Keep it up. Great work.
2021.11.12 in #538 Perl Weekly Challenge 138: Workdays and Split Number
Very compact solutions in Perl and Raku as always by Laurent. He always gets to the point without wasting time. Keep up the great work.
2021.11.19 in #539 Perl Weekly Challenge 139: JortSort and Long Primes
Nice and easy solutions to the weekly challenge both in Perl and Raku. Comparison of Perl and Raku solutions is always fun. Thanks for sharing the knowledge.
2021.11.26 in #540 Perl Weekly Challenge 140: Add Binary
With the power of Raku, the task can be solved in one line as shown by Laurent. Thank you Laurent for sharing your knowledge.
2021.11.28 in #540 Perl Weekly Challenge 140: Multiplication Tables
Nice simple solutions in both Perl and Raku with detailed documentation. Great work as always. Thank you.
2021.12.01 in #541 Perl Weekly Challenge 141: Number Divisors and Like Numbers
I love the use of type in Raku solutions. Having said that, I haven't seen many using the subroutine return type constraint. I would like to see more examples of this from Raku experts like Laurent.
2021.12.07 in #542 Perl Weekly Challenge 142: Divisor Last Digit and Sleep Sort
Laurent introduced Raku's await feaTURE to solve the Sleep Sort task.
2021.12.09 in #542 Next Palindrome Number
2021.12.15 in #543 Perl Weekly Challenge 143: Calculator and Stealthy Numbers
Laurent shared the power of EVAL and its issues. Nice blog post for anyone new to Raku. Keep it up great work.
2021.12.22 in #544 Perl Weekly Challenge 144: Semiprimes and Ulam Sequence
Laurent showcases the power of Raku in way that anyone can easily follow the code. Keep it up great work.
2021.12.27 in #545 Perl Weekly Challenge 145: Dot Product
Laurent shared more than just Perl and Raku solutions this week. Plenty of guest language to keep you busy. Keep it up great work.
2021.12.29 in #545 Perl Weekly Challenge 145: Palindromes
An exclusive blog post for each task gives more space for discussion. Simply loved reading the story. Thank you.
2022.01.06 in #546 Perl Weekly Challenge 146: Prime Numbers and Fraction Tree
Laurent is on a mission to explore guest languages these days. Thank you for your contributions.
2022.01.11 in #547 Perl Weekly Challenge 147: Truncatable Primes and Pentagon Numbers
Laurent continued sharing solutions in Ring, introduced by him recently as well as Perl and Raku. Thanks for sharing.
2022.01.21 in #548 Perl Weekly Challenge 148: Eban Numbers and Cardano Triplets
Laurent shared a one-liner in Raku to solve the Eban numbers task. Really cool, thanks for sharing.
2022.01.26 in #549 Perl Weekly Challenge 149: Fibonacci Digit Sum and Largest Square
Laurent consistently shares solutions in Perl and Raku every week. The quality of his blog posts is always the best. Thanks for sharing.
2022.02.03 in #550 Perl Weekly Challenge 150: Fibonacci Words and Square Free Integers
Laurent presented us with lots of new Raku magic. His Perl solution is not far behind either. Thanks for sharing your knowledge.
2022.02.13 in #551 Perl Weekly Challenge 151: Binary tree Depth
Laurent always shares Perl and Raku solutions which makes it fun to compare the logic in two different languages. Thanks for sharing the knowledge.
2022.02.19 in #552 Perl Weekly Challenge 152: Triangle Sum Path
Two compact solutions this week, specially triangle sum path. Thank you for sharing the knowledge.
2022.02.22 in #553 Perl Weekly Challenge 153: Left Factorials and Factorions
Thank you for the guest contributions, plenty of choices. Keep it up great work.
2022.03.04 in #554 Perl Weekly Challenge 154: Missing Permutations and Padovan Primes
Lots of Raku magic in this week blog as usual. If you are new to Raku then this is a good start for you. Keep it up, great work!
2022.03.11 in #555 Perl Weekly Challenge 155: Fortunate Numbers and Pisano Periods
Thank you for sharing the cool regex for Pisano Period. Thanks for sharing the knowledge with us every week!
2022.03.15 in #556 Perl Weekly Challenge 156: Pernicious and Weird Numbers
Narative style story telling is the highlight of Laurent's blog. This week we had bonus solutions in Julia and Python too. Thank you for your contributions.
2022.03.25 in #557 Perl Weekly Challenge 157: Pythagorean Means and Brazilian Number
I always read the Raku code first, followed by Perl. It makes it so easy to follow the code. Thanks for sharing the knowledge.
2022.03.31 in #558 Perl Weekly Challenge 158: Additive Primes and Cuban Primes
The joy of getting a regular taste of Perl and Raku in one place. It has been source of great knowledge for years. Thanks for everything.
2022.04.07 in #559 Perl Weekly Challenge 159: Farey Sequence and Möbius Number
It's treat to see rational data type Rat in action. Thanks for sharing Raku and Perl magic with us.
2022.04.14 in #560 Perl Weekly Challenge 160: Four is Magic and Equilibrium Index
As expected, Laurent shared very interesting aspects of the task "Four is Magic". Interesting catch. Keep it up great work.
2022.04.23 in #561 Abecedarian Words and Pangrams
Laurent blog is very special where you get Perl and Raku solution together. It makes it so easy to follow. Keep it up great work.
2022.04.27 in #562 Perl Weekly Challenge 162: ISBN-13 and Wheatstone-Playfair
Nice hack in Perl and Raku to solve the ISBN-13 task. Thanks for your contribution.
2022.05.02 in #563 Perl Weekly Challenge 163: Sum Bitwise Operator and Summations
The Raku one-liner by Laurent can never let you down. Amazingly cute. Keep it up great work.
2022.05.12 in #564 Perl Weekly Challenge 164: Prime Palindromes and Happy Numbers
Raku at its best but Perl is also not far behind. Thanks for your contributions.
2022.05.19 in #565 Perl Weekly Challenge 165: Line of Best Fit
Laurent's side by side solutions in Perl and Raku is the best way to learn. Keep it up great work.
2022.05.21 in #565 Perl Weekly Challenge 165: Scalable Vector Graphics
Good use of CPAN module SVG. The end result is the compact and easy to read solution. Thanks for your contribution.
2022.05.29 in #566 Perl Weekly Challenge 166: Hexadecimal Words and K-Directory Diff
We got bonus solution in Perl and Raku other than regular one. Thanks for your contributions.
2022.05.31 in #567 Perl Weekly Challenge 167
Laurent making good use of Raku power and present us a compact solution. I love how his Perl solution looks so similar to Raku. The discussion is also fun to follow. Thanks for sharing the knowledge.
2022.06.11 in #568 Perl Weekly Challenge 168: Perrin Primes
Laurent has been contributing in Perl and Raku but for me, his Raku contribution stands out. Keep it up great work.
2022.06.16 in #569 Perl Weekly Challenge 169: Brilliant Numbers and Achilles Numbers
I loved the compact solution in Raku. You get to know a lot about the Raku. Keep it up great work.
2022.06.23 in #570 Perl Weekly Challenge 170: Primorial Numbers and Kronecker Product
I simply loved the one-liner solution in Raku for the task Primorial Numbers. Thanks for sharing the knowledge.
2022.06.28 in #571 Perl Weekly Challenge 171: Abundant Numbers and First-Class Functions
Laurent beat everyone this week with this record number of guest contributions. Keep it up great work.
2022.07.05 in #572 Perl Weekly Challenge 172
Once again, Laurent shared not only just Perl and Raku but also plenty of guest contributions. Keep it up great work.
2022.07.11 in #573 Perl Weekly Challenge 173
A cool collection of guest languages along with Perl and Raku. Keep it up great work.
2022.07.15 in #573 Sylvester's Sequence in dc
Introducing a new guest language, Dc. Get a gentle dose of Dc. Thanks for sharing.
2022.07.19 in #574 Perl Weekly Challenge 174: Disarium Numbers and Permutation Rankings
Once again, we got cool collection of guest solutions. Keep it up great work.
2022.07.27 in #575 Perl Weekly Challenge 175: Last Sunday and Perfect Totient Numbers
Laurent made an extra effort and shared multiple solutions in Raku. Not only that we got solutions in 17 different languages as well. Great work.
2022.08.02 in #576 Perl Weekly Challenge 176: Permuted Multiples and Reversible Numbers
Laurent continued having fun with different rogramming languages. Enough to keep you busy.
2022.08.08 in #577 Perl Weekly Challenge 177: Damm Algorithm and Palindromic Prime Cyclops
We are lucky once again to have so many different guest languages. Thank you for your contributions.
2022.08.24 in #579 Perl Weekly Challenge 179: Ordinal Numbers and Unicode Sparkline
Good use of library to solve the task. Special credit for the Sparkline solutions. Thanks for sharing.
2022.08.29 in #580 Perl Weekly Challenge 180: First Unique Character and Trim List
Laurent spoilt us once again with loads of solutions in 16 different languages. You don't want to miss the details.
2022.09.06 in #581 Perl Weekly Challenge 181: Sentence Order and Hot day
Once again, we got the glimpse of guest languages, not as many as we used to. Thanks for your contributions.
2022.09.13 in #582 Perl Weekly Challenge 182: Max Index and Common Path
Once again we got the collection of solutions. Cool collections that you really don't want to miss out.
2022.09.25 in #583 Perl Weekly Challenge 183: Unique Array and Date Difference
Raku powerful core features, making the weekly task so easy. Thanks for sharing the knowledge.
2022.09.30 in #584 Perl Weekly Challenge 184: Sequence Number and Split Array
Power of regex in action with detailed analysis. Keep it up great work.
2022.10.09 in #585 Perl Weekly Challenge 185: MAC Address and Mask Code
Smart pure regex solutions in Perl and Raku. Thanks for sharing.
2022.10.11 in #586 Perl Weekly Challenge 186: Zip List and Unicode Makeover
Raku made both the tasks easy peasy and Laurent didn't waste a minute to get that across. Thank you.
2022.10.23 in #587 Perl Weekly Challenge 187: Days Together
Just one task and that too in Raku this week. The discussion around the task is worth checking out.
2022.10.30 in #588 Perl Weekly Challenge 188: Divisible Pairs and Total Zero
Very clever coding, if you know Perl then you can easily Raku and if you know Raku you can easily follow Perl. Thanks to the great writing skill of Laurent.
2022.11.01 in #589 Perl Weekly Challenge 189: Greater Character and Array Degree
Nice use of histogram to solve the Array Degree task. Thanks for sharing.
2022.11.08 in #590 Capital Detection and Decoded List
Near identical solutions in Perl and Raku. This is the case every week with Laurent. Thank you for sharing the knowledge.
2022.11.15 in #591 Perl Weekly Challenge 191: Twice Largest and Cute List
Clarity of inner details can be found in the blog. Great work, thanks for sharing.
2022.11.24 in #592 Perl Weekly Challenge 192: Binary Flip and Equal Distribution
Laurent's ability to make difficult task easy is worth watching. Keep it up great work.
2022.11.29 in #593 Binary String and Odd String
Near identical solutions in Perl and Raku. Keep sharing the knowledge with us every week.
2022.12.10 in #594 Digital Clock and Frequency Equalizer
Great demo of Perl and Raku with such an ease. Thanks for sharing knowledge with us.
2022.12.15 in #595 Special Integers and Most Frequent Even
I liked the compact solutions in Perl and Raku. Great demo of language power. Thanks for sharing.
2022.12.22 in #596 Perl Weekly Challenge 196: Pattern 132 and Range List
Being one of the regular contributors, Laurent never misses the opportunity to entertain us every week.
2022.12.31 in #597 Perl Weekly Challenge 197: Move Zero and Wiggle Sort
Once again Laurent came up with a clean one-liner, worth checking out. Keep it up great work.
2023.01.04 in #598 Perl Weekly Challenge 198: Max Gap and Prime Count
Modular solutions makes the code easy to ready. Well done.
2023.01.12 in #599 Perl Weekly Challenge 199: Good Pairs and Good Triplets
Usually we get Raku to Perl but this time, it is other way around. Nice work,
2023.01.18 in #600 Perl Weekly Challenge 200: Arithmetic Slices and Seven Segment Display
Plenty of demo makes it crystal clear how the code works. Cool attempt. Keep it up.
2023.01.29 in #601 Perl Weekly Challenge 201: Missing Numbers
Raku flaunts the power so openly every week. You can check out yourself, if you don't believe me.
2023.01.30 in #602 Perl Weekly Challenge 202: Consecutive Odds and Widest Valley
Great demo of porting Raku solutions into Perl. I find it helpful to understand the code better. Well done.
2023.02.10 in #603 Perl Weekly Challenge 203: Special Quadruplets and Copy Directory (Functional Programming Approach)
Laurent always spoil us with varieties of solutions. Keep it up great work and thanks for your contributions.
2023.02.15 in #604 Perl Weekly Challenge 204: Monotonic Arrays and Reshape Matrix
Cool use of meta-operator in Raku makes the end result one-liner. Smart solutions both in Perl and Raku. Thanks for sharing the knowledge.
2023.02.20 in #605 Perl Weekly Challenge 205: Third Highest and Maximum (Bit-Wise) XOR
Compact one-liner (kind of) in both Perl and Raku. Nothing less was expected from Laurent. Thanks for your contributions.
2023.02.28 in #606 Perl Weekly Challenge 206: Shortest Time and Array Pairings
Compact solutions in Perl and Raku. Even the hard task looks simple when it comes to Laurent's solution. Well done.
2023.03.06 in #607 Perl Weekly Challenge 207: Keyboard Word and H-Index
Nice and friendly comparison between Perl and Raku. Plenty to learn from the blog as always. Thanks for sharing.
2023.03.15 in #608 Perl Weekly Challenge 208: Minimum Index Sum and Duplicate and Missing
Side by side Perl and Raku solutions make it great to learn the trick. Great job.
2023.03.20 in #609 Perl Weekly Challenge 209: Special Bit Characters and Merge Account
Loved the discussion about the special bit characters task. Interesting aspects raised and explained. Thanks for the contributions.
2023.04.09 in #611 Perl Weekly Challenge 211: Toeplitz Matrix and Split Same Average
Back to blogging after the break (one week only). We missed you so much. Thanks for sharing your knowledge.
2023.04.13 in #612 Perl Weekly Challenge 212
I loved the way Raku magic is implemented in Perl. Very impressive. Well done.
2023.04.17 in #613 Perl Weekly Challenge 213: Fun Sort
Cool attempt to use special comparison subroutine and that too in both Perl and Raku. Very smart, well done.
2023.05.03 in #615 Perl Weekly Challenge 215: Odd One Out and Number Placement
USP of the post is always to see how Perl and Raku get the job done. It is amazing. Thank you for your contributions.
2023.05.03 in #617 Perl Weekly Challenge 215: Odd One Out and Number Placement
USP of the post is always to see how Perl and Raku get the job done. It is amazing. Thank you for your contributions.
2023.05.10 in #616 Perl Weekly Challenge 216: Registration Number
Just one this week making good use of Raku power as always. Thanks for your contributions.
2023.05.30 in #619 Perl Weekly Challenge 219: Sorted Squares
2023.06.05 in #620 Perl Weekly Challenge 220: Common Characters
2023.06.08 in #620 Perl Weekly Challenge 220: Squareful Arrays
2023.06.13 in #621 Perl Weekly Challenge 221: Good Strings
2023.06.14 in #621 Perl Weekly Challenge 221: Arithmetic Subsequence
2023.06.19 in #622 Perl Weekly Challenge 222: Matching Members and Last Member
Get the taste of Perl and Raku solutions in one blog post by our one of the top contributors. Keep it up great work.
2023.06.26 in #623 Perl Weekly Challenge 223: Count Primes
Raku built-in routine is very handy to get the job done. Please do checkout.
2023.07.02 in #623 Perl Weekly Challenge 223: Box Coins
Comparing Perl and Raku solutions is fun and plenty to learn. Thanks for sharing.
2023.07.03 in #624 Perl Weekly Challenge 224: Special Notes
Clever use of Bags in Raku and hashref in Perl. Fun discussion as always, you really don't want to miss it.
2023.07.10 in #625 Perl Weekly Challenge 225: Max Words
Nice and easy without any gimmicks. Great work, keep it up.
2023.07.13 in #625 Perl Weekly Challenge 225: Left Right Sum Diff
Well documented solutions both in Perl and Raku. Enjoy !!!
2023.07.17 in #626 Perl Weekly Challenge 226: Shuffle String
Cool comparison of Perl and Raku implementation as always. You really don't want to miss it.
2023.07.18 in #626 Perl Weekly Challenge 226: Zero Array
Interesting task analysis for deeper understanding. Thanks for sharing the knowledge with us.
2023.07.26 in #627 Perl Weekly Challenge 227: Friday 13th
Using the core module for date operation in Perl and Raku makes the end result portable. Keep it up great work.
2023.07.26 in #627 Perl Weekly Challenge 227: Roman Maths
A thorough task analysis is worth reading, you don't want to miss it. Thanks for sharing.
2023.07.31 in #628 Perl Weekly Challenge 228: Unique Sum
Nice use of Bag from Raku. Bonus get to know the Bag equivalent in Perl. Highly recommended.
2023.08.01 in #628 Perl Weekly Challenge 228: Empty Array
I find this week solution very brave attempt. Why? Check it out yourself.
2023.08.07 in #629 Perl Weekly Challenge 229: Lexicographic Order
2023.08.08 in #629 Perl Weekly Challenge 229: Two out of Three
2023.08.21 in #632 Perl Weekly Challenge 231: Min Max
2023.08.21 in #632 Perl Weekly Challenge 231: Senior Citizens
2023.09.08 in #633 Perl Weekly Challenge 233: Separate Digits
2023.09.10 in #633 Perl Weekly Challenge 233: Frequency Sort
2023.09.11 in #634 Perl Weekly Challenge 234: Common Characters

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