TL;DR

Here we are with TASK #1 from The Weekly Challenge #226. Enjoy!

The challenge

You are given a string and an array of indices of same length as string.

Write a script to return the string after re-arranging the indices in the correct order.

Example 1

Input: $string = 'lacelengh', @indices = (3,2,0,5,4,8,6,7,1)
Output: 'challenge'

Example 2

Input: $string = 'rulepark', @indices = (4,7,3,1,0,5,2,6)
Output: 'perlraku'

The questions

We could argue about what re-arranging the indices means, but it would just be petty and annoying. So the only assumption, supported by the example, is that indices are 0-based.

The solution

This is something that is already baked in our beloved languages: array slicing (in Raku, in Perl).

Raku:

#!/usr/bin/env raku
use v6;
sub MAIN ($s, *@i) { put $s.comb[@i].join('') }

Perl:

#!/usr/bin/env perl
use v5.24;
say join '', (split //, $ARGV[0])[@ARGV[1 .. $#ARGV]];

Stay safe and cheers!