anagrams.pl

use strict;
use warnings;
use v5.18;
my %anagrams;

sub anagram {
	my ( $word ) = @_;
	my @letters = sort split //, $word;
	$anagrams{"@letters"};
}

open my $fh, '<', '/usr/share/dict/words';

while(<$fh>) {
	chomp;
	next if ! /^[a-z]+$/;
	my @letters = sort split //;
	my $new_word = $_;
	$anagrams{"@letters"} .= $new_word . ",";
}

close $fh;

print anagram('dad'), "\n";
print anagram('cat'), "\n";
print anagram('mouse'), "\n";

eval.pl

use strict;
use v5.16;

sub count_lines_in_file {
	my ( $filename ) = @_;
	open my $fh, '<', $filename
		or die {
				code => 1,
				msg => "No such file: $filename",
			};

	my $count = 0;
	while(<$fh>) {
		$count++;
	}
	close $fh;

	return $count;
}

# try the code block
eval {
	print count_lines_in_file('/etc/asswd'), "\n";
};

# error is saved in $@
if ( $@ ) {
	if ( $@->{code} == 1 ) {
	};

	print "warning: couldn't get line count...\n";
	print $@;
}

print "--- the end ---\n";

lab1_sol.pl

use strict;
use warnings;
use v5.16;

print "Got args: @ARGV\n";

my %argv;

for my $word (@ARGV) {
	$argv{$word}++;
}

my @uniq = keys %argv;
print "uniq = @uniq\n";

lab1_solb.pl

use strict;
use warnings;
use v5.16;

use List::MoreUtils qw/uniq/;

my @uniq = uniq @ARGV;
print "uniq = @uniq\n";

lab1_solc.pl

use strict;
use warnings;
use v5.16;

open my $pipe, '|sort -u';

for my $word (@ARGV) {
	print $pipe $word, "\n";
}

close $pipe;

lab2.pl

use strict;
use warnings;
use v5.16;

sub primes {
	# return @result;
}
#
# BONUS
# takes a word and prints all other words
# from /usr/share/dict that are its
# anagram
# (made from the same letters)
sub anagrams {

}

# takes at least two arrays
# and returns
# sum(@a) - sum(@b)
sub diff_sum {
}

###########################
# Class examples
#
#
# returns 2x + 3y + 7z
sub example {
	my ( $x, $y, $z ) = @_;
	return 2 * $x + 3 * $y + 7 * $z;
}

# prints number of arguments
# passed to it
sub how_many_args {
	my $count = @_;
	print $count, "\n";
}

sub even_odd {
	my ( $num ) = @_;
	if ( $num % 2 == 0 ) {
		print "even\n";
	} else {
		print "odd\n";
	}
}



my @primes_till_13 = primes(13);

review.pl

#!/usr/bin/perl
# Specify perl version best used with this script
use v5.16;

# Enforce modern coding style
use strict;

# 'a' + 7
use warnings;

##########
# Functions
# Variables + operators
# Input / Output
# Loops / If
#

my $name = 'ynon';
my $email = 'ynon@ynonperek.com';
my $number = 7;

print "hello world\n";
print "who are you?\n";
$name = <STDIN>;

print "Welcome, $name";

my $x = 10;
my $y = 7;

if ( $x < $y ) {
}

while ( $x < $y ) {
	$x++;
}

for ( my $i=0; $i < 10; $i+=2 ) {
	print "i = $i\n";
}


while(<STDIN>) {
	chomp;
	print length;
}

print for @primes;









my @primes = (3, 5, 7, 11, 13, 17);

for (@primes) {
	print "$_ is a prime\n";
}

for my $num (@primes) {
	print "$num is a prime\n";
}




foreach my $num (@primes) {
	print "$num is a prime\n";
}

my %details = (
	'bob@gmail.com' => 'Mr. Bob',
	'ynon@ynonperek.com' => 'Ynon',
	'john@walla.com' => 'Jane Doe',
);

print $details{'bob@gmail.com'};

signals.pl

use strict;
use warnings;
use v5.16;

$SIG{INT} = sub { ... };

sub dostuff {
	local $SIG{INT} = sub { say "Oh no don't go" }

	while(1) {
		say "yo dude you're so good lookin";
		sleep 5;
	}

}

sol_subroutines.pl

use strict;
use warnings;
use v5.16;
use List::Util qw/sum/;

sub is_prime {
	my ( $n ) = @_;
	for ( my $i=2; $i <= int(sqrt($n)); $i++ ) {
		return if $n % $i == 0;
	}
	1;
}

sub primes {
	my ( $target ) = @_;

	grep { is_prime($_) } (1..$target);
}
#
# BONUS
# takes a word and prints all other words
# from /usr/share/dict that are its
# anagram
# (made from the same letters)
sub anagrams {

}

# takes at least two arrays
# and returns
# sum(@a) - sum(@b)
sub diff_sum {
	my $size = shift;
	my @a    = splice @_, 0, $size;
	my @b    = @_;

	sum(@a) - sum(@b);
}

my @l = (10, 20, 30);
my @k = (10, 25);
my $size = @l;

my $d = diff_sum($size, @l, @k);
print "diff sum = $d\n";





###########################
# Class examples
#
#
# returns 2x + 3y + 7z
sub example {
	my ( $x, $y, $z ) = @_;
	return 2 * $x + 3 * $y + 7 * $z;
}

# prints number of arguments
# passed to it
sub how_many_args {
	my $count = @_;
	print $count, "\n";
}

sub even_odd {
	my ( $num ) = @_;
	if ( $num % 2 == 0 ) {
		print "even\n";
	} else {
		print "odd\n";
	}
}



my @primes_till_13 = primes(13);
print "@primes_till_13", "\n";