php-general Digest 1 Oct 2013 18:51:44 -0000 Issue 8384
php-general Digest 1 Oct 2013 18:51:44 - Issue 8384 Topics (messages 37 through 37): Algorithm Help 37 by: Floyd Resler Administrivia: To subscribe to the digest, e-mail: php-general-digest-subscr...@lists.php.net To unsubscribe from the digest, e-mail: php-general-digest-unsubscr...@lists.php.net To post to the list, e-mail: php-gene...@lists.php.net -- ---BeginMessage--- Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd ---End Message---
[PHP] Algorithm Help
Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] delete S3 bucket with AWS PHP SDK
Hey Tim,
It seems that deleteObject takes in 2 params, and you are sending it 1
param. I would recommend you look at the documentation and make sure you
are sending the right params.
Aziz
On Sun, Sep 29, 2013 at 10:29 PM, Tim Dunphy bluethu...@gmail.com wrote:
Hi Aziz,
Thank you for getting back to me!
I appreciate you spotting that error.
So I corrected that
?php
require_once 'sdk.class.php';
if (isset($_POST['submit'])) {
* $bucket_name = $_POST['bucket_name'];*
// Create the S3 Object from the SDK
$s3 = new AmazonS3();
*
$result = $s3-deleteObject(array(
'Bucket' = $bucket_name ));*
// The response comes back as a Simple XML Object
// In this case we just want to know if everything was okay.
// If not, report the message from the XML response.
if ((int) $response-isOK()) {
echo 'centerDeleted Bucket';
echo 'br /br /';
echo 'a href=listbuckets.phpList Buckets/a/center';
} else {
echo (string) $response-body-Message;
}
//echo 'br /br /';
}
?
body
centerh3Delete S3 Bucket/h3
form name=delete_bucket method=post action=delete_bucket.php
label for=bucket_nameBucket Name:/labelbr /
* input type=text id=bucket_name name=bucket_name /br /br /
*
input type=submit name=submit value=Delete Bucket /
/form/center
script
/body
/html
And this is the error I am currently getting:
Warning: Missing argument 2 for AmazonS3::delete_object() in
/var/www/awssdk/services/s3.class.php on line 1576 Notice: Undefined
variable: filename in /var/www/awssdk/services/s3.class.php on line 1581
Warning: preg_match() expects parameter 2 to be string, array given in
/var/www/awssdk/services/s3.class.php on line 1042 Warning: preg_match()
expects parameter 2 to be string, array given in
/var/www/awssdk/services/s3.class.php on line 1043 Fatal error: Uncaught
exception 'S3_Exception' with message 'S3 does not support Array as a
valid bucket name. Review Bucket Restrictions and Limitations in the S3
Developer Guide for more information.' in
/var/www/awssdk/services/s3.class.php:548 Stack trace: #0
/var/www/awssdk/services/s3.class.php(1594): AmazonS3-authenticate(Array,
Array) #1 [internal function]: AmazonS3-delete_object(Array) #2
/var/www/awssdk/sdk.class.php(436): call_user_func_array(Array, Array) #3
/var/www/awssdk/delete_bucket.php(72): CFRuntime-__call('deleteObject',
Array) #4 /var/www/awssdk/delete_bucket.php(72):
AmazonS3-deleteObject(Array) #5 {main} thrown in
/var/www/awssdk/services/s3.class.php on line 548
Not sure if I'm getting closer here... but definitely appreciate any
advice anyone may have.
Thanks!
Tim
On Sun, Sep 29, 2013 at 5:04 PM, Aziz Saleh azizsa...@gmail.com wrote:
No Problem, the issue is that you referring to the invalid post element
$bucket_name as opposed to the correct on bucket_name.
*$bucket_name = $_POST['$bucket_name'];*
Should be
*$bucket_name = $_POST['bucket_name'];*
Aziz
On Sun, Sep 29, 2013 at 3:28 PM, Tim Dunphy bluethu...@gmail.com wrote:
Hey guys,
Sorry about that i should have posted the full code to give you some
idea of context. Anyway, here it is:
?php
require_once 'sdk.class.php';
if (isset($_POST['submit'])) {
* $bucket_name = $_POST['$bucket_name'];*
// Create the S3 Object from the SDK
*$s3 = new AmazonS3();*
* $result = $s3-deleteObject(array(*
*'Bucket' = $bucket_name ));*
// The response comes back as a Simple XML Object
// In this case we just want to know if everything was okay.
// If not, report the message from the XML response.
if ((int) $response-isOK()) {
echo 'centerDeleted Bucket';
echo 'br /br /';
echo 'a href=listbuckets.phpList Buckets/a/center';
} else {
echo (string) $response-body-Message;
}
//echo 'br /br /';
}
?
body
centerh3Delete S3 Bucket/h3
form name=delete_bucket method=post action=delete_bucket.php
label for=bucket_nameBucket Name:/labelbr /
* input type=text id=bucket_name name=bucket_name /br /br
/*
input type=submit name=submit value=Delete Bucket /
/form/center
So, as you can see I am taking the 'bucket_value' from $_POST and
passing it into the call to S3.
When the form comes up on the web I give it the name of one of my S3
buckets. The result is the following error:
Notice: Undefined index: $bucket_name in
/var/www/awssdk/delete_bucket.php on line 67 Warning: Missing argument 2
for AmazonS3::delete_object() in /var/www/awssdk/services/s3.class.php on
line 1576 Notice: Undefined variable: filename in
/var/www/awssdk/services/s3.class.php on line 1581 Warning: preg_match()
expects parameter 2 to be string, array given in
/var/www/awssdk/services/s3.class.php on line 1042 Warning: preg_match()
expects parameter 2 to be string, array given in
/var/www/awssdk/services/s3.class.php on line 1043 Fatal error: Uncaught
exception 'S3_Exception' with message 'S3 does not support Array as a
valid bucket name.
Re: [PHP] Algorithm Help
On 10/1/2013 12:51 PM, Floyd Resler wrote: Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd Whatever solution you're going with will probably involve a relational database of some sort. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Algorithm Help
DB or flatfile? I would create a matrix of all kids crossed with every kid. Everytime a kid is put in a home with another kid, ++ that index. When dispatching kids, sort by index ASC. Aziz On Tue, Oct 1, 2013 at 3:01 PM, John Meyer johnme...@pueblocomputing.comwrote: On 10/1/2013 12:51 PM, Floyd Resler wrote: Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd Whatever solution you're going with will probably involve a relational database of some sort. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Algorithm Help
On Tue, 2013-10-01 at 15:09 -0400, Aziz Saleh wrote: DB or flatfile? I would create a matrix of all kids crossed with every kid. Everytime a kid is put in a home with another kid, ++ that index. When dispatching kids, sort by index ASC. Aziz On Tue, Oct 1, 2013 at 3:01 PM, John Meyer johnme...@pueblocomputing.comwrote: On 10/1/2013 12:51 PM, Floyd Resler wrote: Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd Whatever solution you're going with will probably involve a relational database of some sort. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php This sounds remarkably like homework, which we can't help you with unless you've got a specific problem that you're stuck with. Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Algorithm Help
m 1375 GLENDALE MILFORD RD., CINCINNATI, OH 45215 On Oct 1, 2013, at 3:14 PM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Tue, 2013-10-01 at 15:09 -0400, Aziz Saleh wrote: DB or flatfile? I would create a matrix of all kids crossed with every kid. Everytime a kid is put in a home with another kid, ++ that index. When dispatching kids, sort by index ASC. Aziz On Tue, Oct 1, 2013 at 3:01 PM, John Meyer johnme...@pueblocomputing.comwrote: On 10/1/2013 12:51 PM, Floyd Resler wrote: Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd Whatever solution you're going with will probably involve a relational database of some sort. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php This sounds remarkably like homework, which we can't help you with unless you've got a specific problem that you're stuck with. Thanks, Ash http://www.ashleysheridan.co.uk Oh, no, this is definitely not homework! :) Although it certainly seems like a homework question. This is a real world problem. I'm keeping track of which kids stay with which host families in the database. My initial approach was to start with kid 1 and see how many times the other kids have stayed with kid 1. The move on to kid 2, and so it. This gives me a score for pairs of kids. However, if say three kids are staying at a host family, what is the best way to determine which set of three kids have stayed together the least? Thanks! Floyd
Re: [PHP] Algorithm Help
Assuming you don't have to be exact, somthing similar to this might work. Assign each kid to a host family randomly for each kid, check how frequently it has been combined with the kids in its assigned family. if it is too close, swap with a different family when all kids in that family are processed, move on to the next family and repeat, excluding the first family for swapping. do the same for all families excluding the previous families. when you have completed all families, do another iteration or two of the whole process. Kind regards/met vriendelijke groet, Serge Fonville http://www.sergefonville.nl 2013/10/1 Floyd Resler fres...@adex-intl.com m 1375 GLENDALE MILFORD RD., CINCINNATI, OH 45215 On Oct 1, 2013, at 3:14 PM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Tue, 2013-10-01 at 15:09 -0400, Aziz Saleh wrote: DB or flatfile? I would create a matrix of all kids crossed with every kid. Everytime a kid is put in a home with another kid, ++ that index. When dispatching kids, sort by index ASC. Aziz On Tue, Oct 1, 2013 at 3:01 PM, John Meyer johnme...@pueblocomputing.comwrote: On 10/1/2013 12:51 PM, Floyd Resler wrote: Here's my task: A group of kids is going to be staying with different host families throughout the next 8 months. The number of kids staying with a host family can range from 2 to 10. When deciding which kids should stay together at a host family, the idea is for the system to put together kids who have stayed with each other the least on past weekends. So, if a host family can keep 5 kids, then the group of 5 kids who have stayed together the least will be chosen. I can't think of an easy, quick way to accomplish this. I've tried various approaches that have resulted in a lot of coding and being very slow. My idea was to give each group of kids a score and the lowest score is the group that is selected. However, this approach wound of iterating through several arrays several times which was really slow. Does anyone have any ideas on this puzzle? Thanks! Floyd Whatever solution you're going with will probably involve a relational database of some sort. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php This sounds remarkably like homework, which we can't help you with unless you've got a specific problem that you're stuck with. Thanks, Ash http://www.ashleysheridan.co.uk Oh, no, this is definitely not homework! :) Although it certainly seems like a homework question. This is a real world problem. I'm keeping track of which kids stay with which host families in the database. My initial approach was to start with kid 1 and see how many times the other kids have stayed with kid 1. The move on to kid 2, and so it. This gives me a score for pairs of kids. However, if say three kids are staying at a host family, what is the best way to determine which set of three kids have stayed together the least? Thanks! Floyd
