The Weekly Challenge

HEADLINES

Welcome to the Week #224 of The Weekly Challenge.

I am missing one of the most regular member, Duncan C. White. I hope he is fine and would come back to the weekly fun soon.

As you all know, The Perl and Raku Conference 2023, is happening in Toronto next week between 11-13 July 2023. I am all geared up to attend the conference and even prepared to give talk on The Weekly Challenge.

How many of you are going to be there? I would love to meet as many as I can.

Time to declare next champion and he is Matthias Muth from Germany. As of today, he has contributed 38 Perl solutions and shared 16 blog posts.

Today, we are giving away Coupon #47 to Bruce Gray for the book, Learning Perl Exercises by brian d foy. I will share the details with you in a separate email.

I just noticed Peter Meszaros is declared twice, #37 and #44. It would mean, we need new member to get this sorted. Apology for the mess.

I am still waiting for BarrOff to share email address with us, so that ebook can be shared with him.

PAST WINNERS



`S. No.`	`Name`	`S. No.`	`Name`

1.	`Cheok-Yin Fung`	2.	`W. Luis Mochan`
3.	`Robert DiCicco`	4.	`Kueppo Wesley`
5.	`Solathian`	6.	`Dario Mazzeo`
7.	`Peter Campbell Smith`	8.	`Kjetil Skotheim`
9.	`Neils van Dijke`	10.	`Laurent Rosenfeld`
11.	`Duncan C. White`	12.	`Ali Moradi`
13.	`Jorg Sommrey`	14.	`James Smith`
15.	`Alexander Pankoff`	16.	`Simon Green`
17.	`Robbie Hatley`	18.	`Bob Lied`
19.	`Athanasius`	20.	`David Ferrone`
21.	`Thomas Kohler`	22.	`Adam Russell`
23.	`E. Choroba`	24.	`Pip Stuart`
25.	`Roger Bell_West`	26.	`Flavio Poletti`
27.	`Dave Jacoby`	28.	`Mariano Spadaccini`
29.	`Lubos Kolouch`	30.	`Matthew Neleigh`
31.	`Paulo Custodio`	32.	`Tyler Bird`
33.	`Carlos Oliveira`	34.	`Avery Adams`
35.	`Matthias Muth`	36.	`Leo Manfredi`
37.	`Peter Meszaros`	38.	`Arne Sommer`
39.	`Jaldhar H. Vyas`	40.	`Mark Anderson`
41.	`Rob Turner`	42.	`BarrOff`
43.	`Robert Ransbottom`	44.	`Peter Meszaros`
45.	`Jan Krnavek`	46.	`Steven Wilson`
47.		48.
49.		50.

Last 5 weeks mainstream contribution stats. Thank you Team PWC for your support and encouragements.


`Week`	`Perl`	`Raku`	`Blog`
`219`	35	22	22
`220`	49	29	18
`221`	39	27	16
`222`	56	30	19
`223`	44	25	16

Last 5 weeks guest contribution stats. Thank you each and every guest contributors for your time and efforts.


`Week`	`Guests`	`Contributions`	`Languages`
`219`	12	37	15
`220`	06	32	10
`221`	07	23	09
`222`	10	41	14
`223`	09	37	13

TOP 10 Guest Languages

Do you see your favourite language in the Top 10? If not then why not contribute regularly and make it to the top.

Rust jumped one position up and reached the rank #6 last week. Congratulations to all Rust contributors.

 1. Python  (1624)
 2. Haskell (561)
 3. Ruby    (535)
 4. Lua     (481)
 5. C       (429)
 6. Rust    (387)
 7. C++     (384)
 8. BQN     (299)
 9. Go      (258)
10. Java    (237)

Blogs with Creative Title

1. Boxed Primes by Arne Sommer.

2. Count Primes? I’ve Never Met the Man by Avery Adams.

3. Sieves and Coins by Matthias Muth.

4. Counting primes and maximising cash by Peter Campbell Smith.

5. Counting Boxes by Roger Bell_West.

6. Counting the coins by Simon Green.

GitHub Repository Stats

1. Commits: 33,083 (`+75`)

2. Pull Requests: 8,305 (`+31`)

3. Contributors: 226 (`+1`)

4. Fork: 285

5. Stars: 159

Our solo sponsor Pete Sergeant has been a great support to keep us motivated. We are lucky that he agreed to continue the journey with us in the year 2023. I would like to personally thank Pete and his entire team for their generosity. It would be great if we could add few more to sponsor the prize money so that we could go back and declare weekly champions as we have done in the past. I hope and wish this will become possible in 2023. The amount doesn’t have to be huge. However, it would be nice to show off bunch of supporters. If an organisation comes forward and supports us then that would be the ultimate achievement.

RECAP

Quick recap of The Weekly Challenge - 223 by Mohammad S Anwar.

PERL REVIEW

If you missed any past reviews then please check out the collection.

RAKU REVIEW

If you missed any past reviews then please check out the collection.

CHART

Please take a look at the charts showing interesting data.

I would like to THANK every member of the team for their valuable suggestions. Please do share your experience with us.

NEW MEMBERS

Please find out How to contribute?, if you have any doubts.

Please try the excellent tool EZPWC created by respected member Saif Ahmed of Team PWC.

GUESTS

Please check out the guest contributions for the Week #223.

Please find past solutions by respected guests. Please share your creative solutions in other languages.

Task 1: Special Notes

Submitted by: Mohammad S Anwar

You are given two strings, $source and $target.

Write a script to find out if using the characters (only once) from source, a target string can be created.

Example 1

Input: $source = "abc"
       $target = "xyz"
Output: false

Example 2

Input: $source = "scriptinglanguage"
       $target = "perl"
Output: true

Example 3

Input: $source = "aabbcc"
       $target = "abc"
Output: true

Task 2: Additive Number

Submitted by: Mohammad S Anwar

You are given a string containing digits 0-9 only.

Write a script to find out if the given string is additive number. An additive number is a string whose digits can form an additive sequence.

A valid additive sequence should contain at least 3 numbers. Except the first 2 numbers, each subsequent number in the sequence must be the sum of the preceding two.

Example 1:

Input: $string = "112358"
Output: true

The additive sequence can be created using the given string digits: 1,1,2,3,5,8
1 + 1 => 2
1 + 2 => 3
2 + 3 => 5
3 + 5 => 8

Example 2:

Input: $string = "12345"
Output: false

No additive sequence can be created using the given string digits.

Example 3:

Input: $string = "199100199"
Output: true

The additive sequence can be created using the given string digits: 1,99,100,199
 1 +  99 => 100
99 + 100 => 199

Last date to submit the solution 23:59 (UK Time) Sunday 9th July 2023.