Life & Grime of Pete OC Just another WordPress weblog

Facebook Puzzles (cont.)

Ok, so it looks like my solution didn't make it with the big guns at Facebook Puzzles.......I happened to miss off a very obvious but required line

#!/usr/bin/php from the top.......oops!!

I also believe I left in a line at the bottom of the script which called the function again, which instead of actually working threw up an error. Facebook don't actually tell you what is wrong, just a simple email saying thanks but no thanks. I've resubmitted my solution in the hope that it will work, if it does then I'll resubmit my Meepmeep! application and post my solution on here.

The line I left on the bottom was
hopit($i);

this has been removed and my solution sent is as follows:

#!/usr/bin/php
<?php
$file = $argv[1];
$open = file($file);

function hopit($number) {
        for ($x = 1; $x <= $number; $x++) {
                if (!is_integer($x / 3)) {
                        if (is_integer($x / 5)) {
                                        echo "Hophop\n";
                        }
                }
                else {
                        if (is_integer($x / 5)) {
                                        echo "Hop\n";
                        }
                        else {
                                echo "Hoppity\n";
                        }
                }
        }
}

foreach ($open as $line_num => $line) {
        $result = trim($line);
        if (is_numeric($result)) {
                hopit($result);
        }
}
?>

Facebook Puzzles

Well I happened to fall over the facebook.com puzzles page, basically it is an application within facebook which gives you puzzles to solve. These puzzles are only solvable by coding which they give you numerous languages to solve them with. The languages you can use are as follows:

• GNU C/C++ 4.2.3
• Ericsson Erlang 5.5.5
• GHC Haskell 6.8.2
• Sun Java 1.5.0_15
• INRIA OCaml 3.10.0
• Perl 5.8.8
• PHP 5.2.4
• Python 2.5.2
• Ruby 1.8.6

I myself have stuck with PHP as this is currently what I know best, however I would like to know Python and C++ a lot more!

I have attempted to complete the first 2 puzzles, these are Hoppity and Meep Meep!

Hoppity

The rules of hoppity are simple,  my PHP script must be able to receive a file name via command line. This file will contain a numerical value which could contain spaces before or after it........I think new lines may also be included in this as well but I'm not too sure??
After you have the number, you must then count up from 1 to this number, for example 15. If the current number can be divided by 3 then you must output Hoppity. If the number can be divided by 5 then you must output Hophop. If the number can be divided by 3 AND 5 then you must output Hop. After each output there must be a new line (\n).

For example if the number was 15 then the following must be output:

Hoppity
Hophop
Hoppity
Hoppity
Hophop
Hoppity
Hop

The following lines would trigger the above outputs

3 (hoppity because 3 /3 = 1)
5 (hophop because 5/5 = 1)
6 (hoppity because 6/3 = 2)
9 (hoppity because 9/3 = 3)
10 (hophop because 10/5 = 2)
12 (hoppity because 12/3 = 4)
15 (hop because 15/3 = 5 & 15/5 = 3)

Yes this all seems simple yet you must code the script so that what ever number is given via the file will give the correct output.

My code is as follows:

$file = $argv[1];
$open = file($file);

function hopit($number) {
	for ($x = 1; $x <= $number; $x++) {
		if (!is_integer($x / 3)) {
			if (is_integer($x / 5)) {
					echo "Hophop\n";
			}
		}
		else {
			if (is_integer($x / 5)) {
					echo "Hop\n";
			}
			else {
				echo "Hoppity\n";
			}
		}
	}
}

foreach ($open as $line_num => $line) {
	$result = trim($line);
	if (is_numeric($result)) {
		hopit($result);
	}
}

hopit($i);

I will talk about Meep Meep! another time.