The Weekly Challenge: 380

TABLE OF CONTENTS

  1. HEADLINES

  2. SPONSOR

  3. RECAP

  4. PERL REVIEW

  5. RAKU REVIEW

  6. CHART

  7. NEW MEMBERS

  8. GUESTS

  9. TASK #1: Sum of Frequencies

10. TASK #2: Reverse Degree

HEADLINES

Welcome to the Week #380 of The Weekly Challenge.

Welcome aboard, Elias Martenson, and thanks for your first contributions in Kap.

Once again, we had tight competition between regular (79) and guest contributions (78). Looks like, very soon, we will create history by contributing more in guest languages than the main languages. I am confused, whether it is happy moment or something to worry about.

Talking about guest languages, Haskell has taken the #4 place again from Ruby. Looking at the numbers, it would be hard to maintain the position.

Looking at fellow members contributions, I feel it’s not worth sharing my own contributions. Mine looks very basic, no magics. I start with Perl and then just literal translate it into Raku and Python so that I don’t forget the syntax.

Below is my contributions to the Task #1 of Week #379.

Perl: source code

sub reverse_string {
    my ($str) = @_;

    my @chars = split('', $str);
    my $_str  = '';

    for (my $i = $#chars; $i >= 0; $i--) {
        $_str .= $chars[$i];
    }

    return $_str;
}

Raku: source code

sub reverse_string(Str $str) {
    my @chars = $str.comb;
    my $_str  = '';

    loop (my $i = @chars.elems - 1; $i >= 0; $i--) {
        $_str ~= @chars[$i];
    }

    return $_str;
}

Python: source code

def reverse_string(string: str) -> str:
    chars = list(string)
    _str  = ''

    for i in range(len(chars) - 1, -1, -1):
        _str += chars[i]

    return _str

Thank you Team PWC, once again.

Happy Hacking!!

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

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

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     (4470)
 2. Rust       (1182)
 3. C          (1045)
 4. Haskell    (924)
 5. Ruby       (924)
 6. Lua        (906)
 7. C++        (733)
 8. Go         (707)
 9. JavaScript (642)
10. Java       (532)

Blogs with Creative Title

1. Armstring or Strong by Arne Sommer.

2. There Is More Than One Way To Power by Jorg Sommrey.

3. Just Do It Yourself! by Matthias Muth.

4. I see strings reversed… sum numbers, too… by Packy Anderson.

5. Reversing and curious numbers by Peter Campbell Smith.

6. Reverse Armstrong by Roger Bell_West.

7. Work it by Simon Green.

GitHub Repository Stats

1. Commits: 50,288 (+111)

2. Pull Requests: 14,334 (+42)

3. Contributors: 280 (+1)

4. Fork: 352 (+1)

5. Stars: 215

SPONSOR

With start of Week #355, we have a new sponsor Marc Perry until the end of year 2026. Having said we are looking for more sponsors so that we can go back to weekly winner. If anyone interested please get in touch with us at perlweeklychallenge@yahoo.com. Thanks for your support in advance. You can find more informations here.

RECAP

Quick recap of The Weekly Challenge - 379 by Mohammad Sajid 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

Elias Martenson, an experienced Kap hacker from Singapore joined the Team PWC.

Please check out the guest contributions for the Week #379.

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

Task 1: Sum of Frequencies

Submitted by: Mohammad Sajid Anwar

You are given a string consisting of English letters.

Write a script to find the vowel and consonant with maximum frequency. Return the sum of two frequencies.

Example 1

Input: $str = "banana"
Output: 5

Vowel: "a" appears 3 times.
Consonant: "n" appears 2 times, "b" appears 1 time.

Max frequency of vowel: 3
Max frequency of consonant: 2

Example 2

Input: $str = "teestett"
Output: 7

Vowel: "e" appears 3 times.
Consonant: "t" appears 4 times, "s" appears 1 time.

Max frequency of vowel: 3
Max frequency of consonant: 4

Example 3

Input: $str = "aeiouuaa"
Output: 3

Vowel: "a" appears 3 times, "u" 2 times, "e", "i", "o" 1 time each.
Consonant: None.

Max frequency of vowel: 3
Max frequency of consonant: 0

Example 4

Input: $str = "rhythm"
Output: 2

Vowel: None
Consonant: "h" appears 2 times, "r", "y", "t", "m" 1 time each.

Max frequency of vowel: 0
Max frequency of consonant: 2

Example 5

Input: $str = "x"
Output: 1

Vowel: None
Consonant: "x" appears 1 time.

Max frequency of vowel: 0
Max frequency of consonant: 1

Task 2: Reverse Degree

Submitted by: Mohammad Sajid Anwar

You are given a string.

Write a script to find the reverse degree of the given string.

For each character, multiply its position in the reversed alphabet (‘a’ = 26, ‘b’ = 25, …, ‘z’ = 1) with its position in the string. Sum these products for all characters in the string to get the reverse degree.

Example 1

Input: $str = "z"
Output: 1

Reverse alphabet value of "z" is 1.
Position 1: 1 x 1
Sum of product: 1

Example 2

Input: $str = "a"
Output: 26

Reverse alphabet value of "a" is 26.
Position 1: 1 x 26
Sum of product: 26

Example 3

Input: $str = "bbc"
Output: 147

Reverse alphabet value of "b" is 25 and "c" is 24.
Position 1: 1 x 25
Position 2: 2 x 25
Position 3: 3 x 24
Sum of product: 25 + 50 + 72 => 147

Example 4

Input: $str = "racecar"
Output: 560

Reverse alphabet value of "r" is 9, "a" is 26, "c" is 24 and "e" is 24.
Position 1: 1 x 9
Position 2: 2 x 26
Position 3: 3 x 24
Position 4: 4 x 22
Position 5: 5 x 24
Position 6: 6 x 26
Position 7: 7 x 9
Sum of product: 9 + 52 + 72 + 88 + 120 + 156 + 63

Example 5

Input: $str = "zyx"
Output: 14

Reverse alphabet value of "z" is 1, "y" is 2 and "x" is 3.
Position 1: 1 x 1
Position 2: 2 x 2
Position 3: 3 x 3
Sum of product: 1 + 4 + 9

By submitting a response to the challenge you agree that your name or pseudonym, any photograph you supply and any other personal information contained in your submission may be published on this website and the associated mobile app. Last date to submit the solution 23:59 (UK Time) Sunday 5th July 2026.