Merge pull request #12285 from PerlMonk-Athanasius/branch-for-challenge-328

Perl & Raku solutions to Tasks 1 & 2 for Week 328

4 files changed, 709 insertions, 0 deletions

diff --git a/challenge-328/athanasius/perl/ch-1.pl b/challenge-328/athanasius/perl/ch-1.pl
new file mode 100644
index 0000000000..441372fd4b
--- /dev/null
+++ b/challenge-328/athanasius/perl/ch-1.pl
@@ -0,0 +1,182 @@
+#!perl
+
+################################################################################
+=comment
+
+Perl Weekly Challenge 328
+=========================
+
+TASK #1
+-------
+*Replace all ?*
+
+Submitted by: Mohammad Sajid Anwar
+
+You are given a string containing only lower case English letters and ?.
+
+Write a script to replace all ? in the given string so that the string doesn’t
+contain consecutive repeating characters.
+
+Example 1
+
+  Input: $str = "a?z"
+  Output: "abz"
+
+  There can be many strings, one of them is "abz".
+  The choices are 'a' to 'z' but we can't use either 'a' or 'z' to replace the
+  '?'.
+
+Example 2
+
+  Input: $str = "pe?k"
+  Output: "peak"
+
+Example 3
+
+  Input: $str = "gra?te"
+  Output: "grabte"
+
+=cut
+################################################################################
+
+#--------------------------------------#
+# Copyright © 2025 PerlMonk Athanasius #
+#--------------------------------------#
+
+#===============================================================================
+=comment
+
+Interface
+---------
+1. If no command-line arguments are given, the test suite is run. Otherwise:
+2. A string containing only lower case English letters and "?" is entered on the
+   command-line.
+
+=cut
+#===============================================================================
+
+use v5.32;         # Enables strictures
+use warnings;
+use Const::Fast;
+use Test::More;
+
+const my $USAGE => <<END;
+Usage:
+  perl $0 <str>
+  perl $0
+
+    <str>    A string containing only lower case English letters and "?"
+END
+
+#-------------------------------------------------------------------------------
+BEGIN
+#-------------------------------------------------------------------------------
+{
+    $| = 1;
+    print "\nChallenge 328, Task #1: Replace all ? (Perl)\n\n";
+}
+
+#===============================================================================
+MAIN:
+#===============================================================================
+{
+    my $argc = scalar @ARGV;
+
+    if    ($argc == 0)
+    {
+        run_tests();
+    }
+    elsif ($argc == 1)
+    {
+        my $str = $ARGV[ 0 ];
+
+        $str =~ / ^ [a-z?]* $ /x or error( 'Invalid string' );
+
+        print qq[Input: \$str = "$str"\n];
+
+        my $replaced = replace_queries( $str );
+
+        print qq[Output:       "$replaced"\n];
+    }
+    else
+    {
+        error( "Expected 1 or 0 command-line arguments, found $argc" );
+    }
+}
+
+#-------------------------------------------------------------------------------
+sub replace_queries
+#-------------------------------------------------------------------------------
+{
+    my ($str) = @_;
+        $str  =~ / ^ [a-z?]* $ /x or die 'Invalid string';
+
+    my  $replaced = '';
+    my  @chars    = split //, $str;
+
+    for my $i (0 .. $#chars)
+    {
+        my $char = $chars[ $i ];
+
+        if ($char eq '?')
+        {
+            for my $new ('a' .. 'z')
+            {
+                if (($i == 0       || $new ne $chars[ $i - 1 ]) &&
+                    ($i == $#chars || $new ne $chars[ $i + 1 ]))
+                {
+                    $char = $chars[ $i ] = $new;
+                    last;
+                }
+            }
+        }
+
+        $replaced .= $char;
+    }
+
+    return $replaced;
+}
+
+#-------------------------------------------------------------------------------
+sub run_tests
+#-------------------------------------------------------------------------------
+{
+    print "Running the test suite\n";
+
+    while (my $line = <DATA>)
+    {
+        chomp $line;
+
+        my  ($test_name, $str, $expected) = split / \| /x, $line;
+
+        for ($test_name, $str, $expected)
+        {
+            s/ ^ \s+   //x;
+            s/   \s+ $ //x;
+        }
+
+        my $replaced = replace_queries( $str );
+
+        is $replaced, $expected, $test_name;
+    }
+
+    done_testing;
+}
+
+#-------------------------------------------------------------------------------
+sub error
+#-------------------------------------------------------------------------------
+{
+    my ($message) = @_;
+
+    die "ERROR: $message\n$USAGE";
+}
+
+################################################################################
+
+__DATA__
+Example 1 |a?z   |abz
+Example 2 |pe?k  |peak
+Example 3 |gra?te|grabte
+Adjacent ?|ab??cd|ababcd
+All ?     |????? |ababa
diff --git a/challenge-328/athanasius/perl/ch-2.pl b/challenge-328/athanasius/perl/ch-2.pl
new file mode 100644
index 0000000000..06edee68a8
--- /dev/null
+++ b/challenge-328/athanasius/perl/ch-2.pl
@@ -0,0 +1,178 @@
+#!perl
+
+################################################################################
+=comment
+
+Perl Weekly Challenge 328
+=========================
+
+TASK #2
+-------
+*Good String*
+
+Submitted by: Mohammad Sajid Anwar
+
+You are given a string made up of lower and upper case English letters only.
+
+Write a script to return the good string of the given string. A string is called
+good string if it doesn’t have two adjacent same characters, one in upper case
+and other is lower case.
+
+UPDATE [2025-07-01]: Just to be explicit, you can only remove pair if they are
+same characters, one in lower case and other in upper case, order is not
+important.
+
+Example 1
+
+  Input: $str = "WeEeekly"
+  Output: "Weekly"
+
+  We can remove either, "eE" or "Ee" to make it good.
+
+Example 2
+
+  Input: $str = "abBAdD"
+  Output: ""
+
+  We remove "bB" first: "aAdD"
+  Then we remove "aA": "dD"
+  Finally remove "dD".
+
+Example 3
+
+  Input: $str = "abc"
+  Output: "abc"
+
+=cut
+################################################################################
+
+#--------------------------------------#
+# Copyright © 2025 PerlMonk Athanasius #
+#--------------------------------------#
+
+#===============================================================================
+=comment
+
+Interface
+---------
+1. If no command-line arguments are given, the test suite is run. Otherwise:
+2. A string made up of lower and upper case English letters only is entered on
+   the command-line.
+
+=cut
+#===============================================================================
+
+use v5.32;         # Enables strictures
+use warnings;
+use Const::Fast;
+use Test::More;
+
+const my $USAGE => <<END;
+Usage:
+  perl $0 <str>
+  perl $0
+
+    <str>    A string made up of lower and upper case English letters only
+END
+
+my $pair_rx;
+
+#-------------------------------------------------------------------------------
+BEGIN
+#-------------------------------------------------------------------------------
+{
+    $| = 1;
+    print "\nChallenge 328, Task #2: Good String (Perl)\n\n";
+}
+
+#===============================================================================
+MAIN:
+#===============================================================================
+{
+    my $argc = scalar @ARGV;
+
+    if    ($argc == 0)
+    {
+        run_tests();
+    }
+    elsif ($argc == 1)
+    {
+        my $str =  $ARGV[ 0 ];
+           $str =~ / ([^A-Za-z]) /x and error( qq[Invalid character "$1"] );
+
+        print qq[Input: \$str = "$str"\n];
+
+        my $good_str = get_good_str( $str );
+
+        print qq[Output:       "$good_str"\n];
+    }
+    else
+    {
+        error( "Expected 1 or 0 command-line arguments, found $argc" );
+    }
+}
+
+#-------------------------------------------------------------------------------
+BEGIN
+#-------------------------------------------------------------------------------
+{
+    my @pairs;
+
+    push @pairs, $_ . uc, uc . $_ for 'a' .. 'z';
+
+    $pair_rx = join '|', @pairs;
+}
+
+#-------------------------------------------------------------------------------
+sub get_good_str
+#-------------------------------------------------------------------------------
+{
+    my ($str) =  @_;
+        $str  =~ / ^ [A-Za-z]* $ /x or die 'Invalid character';
+
+    1 while $str =~ s/ $pair_rx //x;
+
+    return $str;
+}
+
+#-------------------------------------------------------------------------------
+sub run_tests
+#-------------------------------------------------------------------------------
+{
+    print "Running the test suite\n";
+
+    while (my $line = <DATA>)
+    {
+        chomp $line;
+
+        my  ($test_name, $str, $expected) = split / \| /x, $line;
+
+        for ($test_name, $str, $expected)
+        {
+            s/ ^ \s+   //x;
+            s/   \s+ $ //x;
+        }
+
+        my $good_str = get_good_str( $str );
+
+        is $good_str, $expected, $test_name;
+    }
+
+    done_testing;
+}
+
+#-------------------------------------------------------------------------------
+sub error
+#-------------------------------------------------------------------------------
+{
+    my ($message) = @_;
+
+    die "ERROR: $message\n$USAGE";
+}
+
+################################################################################
+
+__DATA__
+Example 1|WeEeekly|Weekly
+Example 2|abBAdD  |
+Example 3|abc     |abc
diff --git a/challenge-328/athanasius/raku/ch-1.raku b/challenge-328/athanasius/raku/ch-1.raku
new file mode 100644
index 0000000000..a15f5529f8
--- /dev/null
+++ b/challenge-328/athanasius/raku/ch-1.raku
@@ -0,0 +1,179 @@
+use v6d;
+
+################################################################################
+=begin comment
+
+Perl Weekly Challenge 328
+=========================
+
+TASK #1
+-------
+*Replace all ?*
+
+Submitted by: Mohammad Sajid Anwar
+
+You are given a string containing only lower case English letters and ?.
+
+Write a script to replace all ? in the given string so that the string doesn’t
+contain consecutive repeating characters.
+
+Example 1
+
+  Input: $str = "a?z"
+  Output: "abz"
+
+  There can be many strings, one of them is "abz".
+  The choices are 'a' to 'z' but we can't use either 'a' or 'z' to replace the 
+  '?'.                                                                      #'
+
+Example 2
+
+  Input: $str = "pe?k"
+  Output: "peak"
+
+Example 3
+
+  Input: $str = "gra?te"
+  Output: "grabte"
+
+=end comment
+################################################################################
+
+#--------------------------------------#
+# Copyright © 2025 PerlMonk Athanasius #
+#--------------------------------------#
+
+#===============================================================================
+=begin comment
+
+Interface
+---------
+1. If no command-line arguments are given, the test suite is run. Otherwise:
+2. A string containing only lower case English letters and "?" is entered on the
+   command-line.
+
+=end comment
+#===============================================================================
+
+use Test;
+
+#-------------------------------------------------------------------------------
+BEGIN
+#-------------------------------------------------------------------------------
+{
+    "\nChallenge 328, Task #1: Replace all ? (Raku)\n".put;
+}
+
+#===============================================================================
+multi sub MAIN
+(
+    #| A string containing only lower case English letters and "?"
+
+    Str:D $str where / ^ <[ a..z ? ]>* $ /
+)
+#===============================================================================
+{
+    qq[Input: \$str = "$str"].put;
+
+    my Str $replaced = replace-queries( $str );
+
+    qq[Output:       "$replaced"].put;
+}
+
+#===============================================================================
+multi sub MAIN()                                  # No input: run the test suite
+#===============================================================================
+{
+    run-tests();
+}
+
+#-------------------------------------------------------------------------------
+sub replace-queries( Str:D $str where / ^ <[ a..z ? ]>* $ / --> Str:D )
+#-------------------------------------------------------------------------------
+{
+    my Str $replaced = '';
+    my Str @chars    = $str.split: '', :skip-empty;
+
+    for 0 .. @chars.end -> UInt $i
+    {
+        my Str $char = @chars[ $i ];
+
+        if $char eq '?'
+        {
+            for 'a' .. 'z' -> Str $new
+            {
+                if ($i == 0          || $new ne @chars[ $i - 1 ]) &&
+                   ($i == @chars.end || $new ne @chars[ $i + 1 ])
+                {
+                    $char = @chars[ $i ] = $new;
+                    last;
+                }
+            }
+        }
+
+        $replaced ~= $char;
+    }
+
+    return $replaced;
+}
+
+#-------------------------------------------------------------------------------
+sub run-tests()
+#-------------------------------------------------------------------------------
+{
+    'Running the test suite'.put;
+
+    for test-data.lines -> Str $line
+    {
+        my Str ($test-name, $str, $expected) = $line.split: / \| /;
+
+        for     $test-name, $str, $expected
+        {
+            s/ ^ \s+   //;
+            s/   \s+ $ //;
+        }
+
+        my Str $replaced = replace-queries( $str );
+
+        is $replaced, $expected, $test-name;
+    }
+
+    done-testing;
+}
+
+#-------------------------------------------------------------------------------
+sub error( Str:D $message )
+#-------------------------------------------------------------------------------
+{
+    "ERROR: $message".put;
+
+    USAGE();
+
+    exit 0;
+}
+
+#-------------------------------------------------------------------------------
+sub USAGE()
+#-------------------------------------------------------------------------------
+{
+    my Str $usage = $*USAGE;
+
+    $usage ~~ s:g/ ($*PROGRAM-NAME) /raku $0/;
+
+    $usage.put;
+}
+
+#-------------------------------------------------------------------------------
+sub test-data( --> Str:D )
+#-------------------------------------------------------------------------------
+{
+    return q:to/END/;
+        Example 1 |a?z   |abz
+        Example 2 |pe?k  |peak
+        Example 3 |gra?te|grabte
+        Adjacent ?|ab??cd|ababcd
+        All ?     |????? |ababa
+        END
+}
+
+################################################################################
diff --git a/challenge-328/athanasius/raku/ch-2.raku b/challenge-328/athanasius/raku/ch-2.raku
new file mode 100644
index 0000000000..9066b21cb5
--- /dev/null
+++ b/challenge-328/athanasius/raku/ch-2.raku
@@ -0,0 +1,170 @@
+use v6d;
+
+################################################################################
+=begin comment
+
+Perl Weekly Challenge 328
+=========================
+
+TASK #2
+-------
+*Good String*
+
+Submitted by: Mohammad Sajid Anwar
+
+You are given a string made up of lower and upper case English letters only.
+
+Write a script to return the good string of the given string. A string is called
+good string if it doesn’t have two adjacent same characters, one in upper case
+and other is lower case.
+
+UPDATE [2025-07-01]: Just to be explicit, you can only remove pair if they are
+same characters, one in lower case and other in upper case, order is not
+important.
+
+Example 1
+
+  Input: $str = "WeEeekly"
+  Output: "Weekly"
+
+  We can remove either, "eE" or "Ee" to make it good.
+
+Example 2
+
+  Input: $str = "abBAdD"
+  Output: ""
+
+  We remove "bB" first: "aAdD"
+  Then we remove "aA": "dD"
+  Finally remove "dD".
+
+Example 3
+
+  Input: $str = "abc"
+  Output: "abc"
+
+=end comment
+################################################################################
+
+#--------------------------------------#
+# Copyright © 2025 PerlMonk Athanasius #
+#--------------------------------------#
+
+#===============================================================================
+=begin comment
+
+Interface
+---------
+1. If no command-line arguments are given, the test suite is run. Otherwise:
+2. A string made up of lower and upper case English letters only is entered on
+   the command-line.
+
+Assumptions
+-----------
+
+
+=end comment
+#===============================================================================
+
+use Test;
+
+my Str $pair-rx;
+
+#-------------------------------------------------------------------------------
+BEGIN
+#-------------------------------------------------------------------------------
+{
+    "\nChallenge 328, Task #2: Good String (Raku)\n".put;
+}
+
+#===============================================================================
+multi sub MAIN
+(
+    #| A string made up of lower and upper case English letters only
+
+    Str:D $str where / ^ <[ A..Z a..z ]>* $ /
+)
+#===============================================================================
+{
+    qq[Input: \$str = "$str"].put;
+
+    my Str $good-str = get-good-str( $str );
+
+    qq[Output:       "$good-str"].put:
+}
+
+#===============================================================================
+multi sub MAIN()                                  # No input: run the test suite
+#===============================================================================
+{
+    run-tests();
+}
+
+#-------------------------------------------------------------------------------
+BEGIN
+#-------------------------------------------------------------------------------
+{
+    my Str @pairs;
+           @pairs.push: $_ ~ .uc, .uc ~ $_ for 'a' .. 'z';
+
+    $pair-rx = @pairs.join: '||';
+}
+
+#-------------------------------------------------------------------------------
+sub get-good-str( Str:D $str where / ^ <[ A..Z a..z ]>* $ / --> Str:D )
+#-------------------------------------------------------------------------------
+{
+    my Str $good-str = $str;
+
+    Nil while $good-str ~~ s/ <$pair-rx> //;
+
+    return $good-str;
+}
+
+#-------------------------------------------------------------------------------
+sub run-tests()
+#-------------------------------------------------------------------------------
+{
+    'Running the test suite'.put;
+
+    for test-data.lines -> Str $line
+    {
+        my Str ($test-name, $str, $expected) = $line.split: / \| /;
+
+        for     $test-name, $str, $expected
+        {
+            s/ ^ \s+   //;
+            s/   \s+ $ //;
+        }
+
+        my Str $good-str = get-good-str( $str );
+
+        is $good-str, $expected, $test-name;
+    }
+
+    done-testing;
+}
+
+#-------------------------------------------------------------------------------
+sub USAGE()
+#-------------------------------------------------------------------------------
+{
+    my Str $usage = $*USAGE;
+
+    $usage ~~ s:g/ ($*PROGRAM-NAME) /raku $0/;
+
+    $usage.put;
+}
+
+#-------------------------------------------------------------------------------
+sub test-data( --> Str:D )
+#-------------------------------------------------------------------------------
+{
+    return q:to/END/;
+        Example 1|WeEeekly|Weekly
+        Example 2|abBAdD  |
+        Example 3|abc     |abc
+        END
+}
+
+################################################################################