The Weekly Challenge

09. TASK #1: Self-descriptive Numbers

HEADLINES

Finally we are now 2 years old and we should start behaving like serious player now. Agree? I would like to keep the fun part alive associated with the weekly challenge. I urge everyone please don’t restrict yourself to any rules. Please express yourself as you feel comfortable. As I always remind and encourage everyone to keep breaking the boundaries and share your experiences with the team and rest of the world.

Am I missing anything?

Nope, I am not. I know it is time to declare the champion since today is the first Monday of the month. For the first ever, I announce a guest as a champion and he is none other than Tyler Wardhaugh himself. Tyler joined the team in the Week #76 and has been one of main source of Clojure solutions.

What else?

Well, this week we had 3 live video contributions, one from a very dear friend of mine, Lance Wicks and two from me (yes you heard correct). Well, I have had a little breather this week because of long weekend, thanks to Easter holiday and Bank holiday in England. I am currently working on another video to celebrate the 2 years of the weekly challenge. Hopefully if everything goes as per the plan, I will make it public by next week.

Lance Wicks: Maximum Gap

Mohammad Anwar: Maximum Gap

Mohammad Anwar: Fun Time

Let us all welcome the new member Peter Mayr, an experienced Perl hacker from Koln. I wish him all the best.

Let us share some interesting stats from the GitHub repository.

1. Commits: 15,640 (+150)

2. Pull Requests: 3,825 (+37)

3. Contributors: 162 (+2)

4. Fork: 204 (+2)

5. Stars: 91

Last but not least, I would like to thank each and every member for their support and encouragement.

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 2021. 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 2021. 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 - 106” by Mohammad S Anwar.

PERL REVIEW

Please check out Perl solutions review of the “Perl Weekly Challenge - 104” by Colin Crain.

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

We have a new member Peter Mayr from Koln joining the Team PWC.

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 checkout the guest contributions for the Week #106.

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

TASK #1 › Self-descriptive Numbers

Submitted by: Mohammad S Anwar

Write a script to display the first three self-descriptive numbers. As per wikipedia, the definition of Self-descriptive Number is

In mathematics, a self-descriptive number is an integer m that in a given base b is b digits long in which each digit d at position n (the most significant digit being at position 0 and the least significant at position b−1) counts how many instances of digit n are in m.

For example:

 1210 is a four-digit self-descriptive number:

    position 0 has value 1 i.e. there is only one 0 in the number
    position 1 has value 2 i.e. there are two 1 in the number
    position 2 has value 1 i.e. there is only one 2 in the number
    position 3 has value 0 i.e. there is no 3 in the number

Output

    1210, 2020, 21200

WARNING:

TASK #2 › List Methods

Submitted by: Mohammad S Anwar

Write a script to list methods of a package/class.

Example

package Calc;

use strict;
use warnings;

sub new { bless {}, shift; }
sub add { }
sub mul { }
sub div { }

1;

Output

BEGIN
mul
div
new
add

Last date to submit the solution 23:59 (UK Time) Sunday 11th April 2021.