The Weekly Challenge

10. TASK #2: Left Right Sum Diff

HEADLINES

Welcome to the Week #225 of The Weekly Challenge.

I would like to apologize for declaring Matthias Muth twice champion. It shows my mental state. Let me get this correct first.

So the champion of month, June 2023, is Avery Adams. He joined the Team PWC in the Week #205. As of today, he has shared 28 Perl solutions and 29 blog posts.

Talking about correction, I need to find new winner for the ebook #44 as I declared Peter Meszaros twice by mistake.

Andrew Shitov, our in-house Raku Reviewer, surprised us all with the blog post showing the power of new class feature of Perl v5.38.

Today, we are giving away Coupon #44 to Andreas Voegele for the book, Learning Perl Exercises by brian d foy. I will share the details with you in a separate email.

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.	`Andreas Voegele`
45.	`Jan Krnavek`	46.	`Steven Wilson`
47.	`Bruce Gray`	48.
49.		50.

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


`Week`	`Perl`	`Raku`	`Blog`
`220`	49	29	18
`221`	39	27	16
`222`	56	30	19
`223`	44	25	16
`224`	38	21	15

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


`Week`	`Guests`	`Contributions`	`Languages`
`220`	06	32	10
`221`	07	23	09
`222`	10	41	14
`223`	09	37	13
`224`	08	32	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.

 1. Python  (1641)
 2. Haskell (563)
 3. Ruby    (538)
 4. Lua     (483)
 5. C       (429)
 6. Rust    (391)
 7. C++     (385)
 8. BQN     (299)
 9. Go      (258)
10. Java    (238)

Blogs with Creative Title

1. Numbered Notes by Arne Sommer.

2. Passing Notes by Avery Adams.

3. Addictive additive by Matthias Muth.

4. Strings and sequences by Peter Campbell Smith.

5. Specially Additive Number Notes by Roger Bell_West.

GitHub Repository Stats

1. Commits: 33,161 (`+78`)

2. Pull Requests: 8,333 (`+28`)

3. Contributors: 226

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 - 224 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 #224.

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

Task 1: Max Words

Submitted by: Mohammad S Anwar

You are given a list of sentences, @list.

A sentence is a list of words that are separated by a single space with no leading or trailing spaces.

Write a script to find out the maximum number of words that appear in a single sentence.

Example 1

Input: @list = ("Perl and Raku belong to the same family.",
                "I love Perl.",
                "The Perl and Raku Conference.")
Output: 8

Example 2

Input: @list = ("The Weekly Challenge.",
                "Python is the most popular guest language.",
                "Team PWC has over 300 members.")
Output: 7

Task 2: Left Right Sum Diff

Submitted by: Mohammad S Anwar

You are given an array of integers, @ints.

Write a script to return left right sum diff array as shown below:

@ints = (a, b, c, d, e)

@left  = (0, a, (a+b), (a+b+c))
@right = ((c+d+e), (d+e), e, 0)
@left_right_sum_diff = ( | 0 - (c+d+e) |,
                         | a - (d+e)   |,
                         | (a+b) - e   |,
                         | (a+b+c) - 0 | )

Example 1:

Input: @ints = (10, 4, 8, 3)
Output: (15, 1, 11, 22)

@left  = (0, 10, 14, 22)
@right = (15, 11, 3, 0)

@left_right_sum_diff = ( |0-15|, |10-11|, |14-3|, |22-0|)
                     = (15, 1, 11, 22)

Example 2:

Input: @ints = (1)
Output: (0)

@left  = (0)
@right = (0)

@left_right_sum_diff = ( |0-0| ) = (0)

Example 3:

Input: @ints = (1, 2, 3, 4, 5)
Output: (14, 11, 6, 1, 10)

@left  = (0, 1, 3, 6, 10)
@right = (14, 12, 9, 5, 0)

@left_right_sum_diff = ( |0-14|, |1-12|, |3-9|, |6-5|, |10-0|)
                     = (14, 11, 6, 1, 10)

Last date to submit the solution 23:59 (UK Time) Sunday 16th July 2023.