Task — Acronym

You are given an array of strings and a check string. Write a script to find out if the check string is the acronym of the words in the given array.

Examples

Example 1
Input: @str = ("Perl", "Python", "Pascal")
       $chk = "ppp"
Output: true

Example 2
Input: @str = ("Perl", "Raku")
       $chk = "rp"
Output: false

Example 3
Input: @str = ("Oracle", "Awk", "C")
       $chk = "oac"
Output: true

Analysis

All that's needed here is to concatenate the initial letters of @str and compare the result with $chk:

$initials .= lc(substr($_, 0, 1)) for @str;
$result = $initials eq lc($chk) ? 'true' : 'false';

Try it 

Script

#!/usr/bin/perl

use v5.16;    # The Weekly Challenge - 2023-10-23
use utf8;     # Week 240 task 1 - Acronym
use strict;   # Peter Campbell Smith
use warnings; # Blog: http://ccgi.campbellsmiths.force9.co.uk/challenge

acronym(['Perl', 'Python', 'Pascal'], 'ppp');
acronym(['hyper', 'text', 'markup', 'language'], 'HTML');
acronym(['All', 'clients', 'receive', 'our', 'New', 'Year', 'message'], 'acronym');
acronym(['Once', 'upon', 'a', 'time'], 'tauo');

sub acronym {
    
    my (@str, $chk, $initials);
    
    # initialise
    @str = @{$_[0]};
    $chk = $_[1];
    
    # concatenate first letters of @str
    $initials = '';
    $initials .= lc(substr($_, 0, 1)) for @str;
    
    # show results
    say qq[\nInput:  \@str = ('] . join(q[', '], @str) . q[')];
    say qq[        \$chk = '$chk'];
    say qq[Output: ] . ($initials eq lc($chk) ? 'true' : 'false');
}
    

Output

Input:  @str = ('Perl', 'Python', 'Pascal')
        $chk = 'ppp'
Output: true

Input:  @str = ('hyper', 'text', 'markup', 'language')
        $chk = 'HTML'
Output: true

Input:  @str = ('All', 'clients', 'receive', 'our', 'New', 'Year', 'message')
        $chk = 'acronym'
Output: true

Input:  @str = ('Once', 'upon', 'a', 'time')
        $chk = 'tauo'
Output: false