The Weekly Challenge

09. TASK #1: Special Bit Characters

HEADLINES

Welcome to the Week #209 of The Weekly Challenge.

We have new guest Simon Dueck joined Team PWC and shared solutions to Week #207 and Week #208 in F#.

E. Alvarez blog post sharing Javascript magic once again. Please do checkout.

Today, we are giving away Coupon #32 to Tyler Bird for the book, Learning Perl Exercises by brian d foy. I will share the details with you in a separate email.

PAST WINNERS



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1.	`Cheok-Yin Fung`	2.	`W. Luis Mochan`
3.	`Robert DiCicco`	4.	`Kueppo Wesley`
5.	`Solathian`	6.	`Dario Mazzeo`
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Another bumper week with 100+ contributions. Thank you Team PWC.


`Week`	`Perl`	`Raku`	`Blog`
`184`	57	31	17
`185`	61	35	19
`186`	58	33	20
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`188`	63	36	16
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`204`	56	31	22
`205`	64	30	25
`206`	59	29	23
`207`	59	34	26
`208`	60	33	23

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RECAP

Quick recap of The Weekly Challenge - 208 by Mohammad S Anwar.

PERL REVIEW

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RAKU REVIEW

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CHART

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

NEW MEMBERS

Simon Dueck joined the Team PWC as guest.

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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 #208.

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

Task 1: Special Bit Characters

Submitted by: Mohammad S Anwar

You are given an array of binary bits that ends with 0.

Valid sequences in the bit string are:

[0] -decodes-to-> "a"
[1, 0] -> "b"
[1, 1] -> "c"

Write a script to print 1 if the last character is an “a” otherwise print 0.

Example 1

Input: @bits = (1, 0, 0)
Output: 1

The given array bits can be decoded as 2-bits character (10) followed by 1-bit character (0).

Example 2

Input: @bits = (1, 1, 1, 0)
Output: 0

Possible decode can be 2-bits character (11) followed by 2-bits character (10) i.e. the last character is not 1-bit character.

Task 2: Merge Account

Submitted by: Mohammad S Anwar

You are given an array of accounts i.e. name with list of email addresses.

Write a script to merge the accounts where possible. The accounts can only be merged if they have at least one email address in common.

Example 1:

Input: @accounts = [ ["A", "a1@a.com", "a2@a.com"],
                     ["B", "b1@b.com"],
                     ["A", "a3@a.com", "a1@a.com"] ]
                   ]

Output: [ ["A", "a1@a.com", "a2@a.com", "a3@a.com"],
          ["B", "b1@b.com"] ]

Example 2:

Input: @accounts = [ ["A", "a1@a.com", "a2@a.com"],
                     ["B", "b1@b.com"],
                     ["A", "a3@a.com"],
                     ["B", "b2@b.com", "b1@b.com"] ]

Output: [ ["A", "a1@a.com", "a2@a.com"],
          ["A", "a3@a.com"],
          ["B", "b1@b.com", "b2@b.com"] ]

Last date to submit the solution 23:59 (UK Time) Sunday 26th March 2023.