Fuzzy Buckets

rEFIt - Booting Linux with Bootcamp

Cast the results of a subquery as an array then join as a string

select p.*, 

array_to_string(array(select first_name||' '||last_name from publications.authors a where a.publication_id = p.id), ',') as aus , 


array_to_string(array(select first_name||' '||last_name from publications.editors e where e.publication_id = p.id), ',') as eds 


from publications.publication_as_ris3 p
 
where p.av in ('Forthcoming','Published') and p.id in ((select publication_id from publications.authors where first_name = 'Tony' and last_name = 'Kinder')union(select publication_id from publications.editors where first_name = 'Tony' and last_name = 'Kinder'))

Server replication in Postgres 9.1

Postgres slave server in five minutes

Files: Postgres_9.1_replication_standby_files.tar.gz

Binary Replication in 6 Steps

This 6-step guide, and all of the examples in this tutorial, assume that you have a master server at 192.168.0.1 and a standby server at 192.168.0.2 and that your database and its configuration files are installed at /var/lib/postgresql/data. Replace those with whatever your actual server addresses and directories are.

1. Edit postgresql.conf on the master to turn on streaming replication. Change these settings:

 listen_address = '*'
 wal_level = hot_standby
 max_wal_senders = 3

2. Edit pg_hba.conf on the master in order to let the standby connect.

 host  replication   all   192.168.0.2/32      trust

3. Edit recovery.conf and postgresql.conf on the standby to start up replication and hot standby. First, in postgresql.conf, change this line:

 hot_standby = on

Then create a file in the standby's data directory (which is often the same directory as postgresql.conf and pg_hba.conf, except on some Linux distributions such as Debian and Ubuntu), called recovery.conf, with the following lines:

 standby_mode = 'on'
 primary_conninfo = 'host=192.168.0.1'

4. Shutdown the master and copy the files. You want to copy most but not all files between the two servers, excluding the configuration files and the pg_xlog directory.

tar cvzhf /Users/paulhollands/Desktop/data.tgz --exclude 'pg_xlog' --exclude 'postgresql.conf' data/

5. Start the standby first, so that they can't get out of sync.

6. Start the master.

Jython and Django Trial

# cd /Users/paulhollands/jython2.5.2/bin
# django-admin.py startproject dss
# jython manage.py runserver
Validating models...

0 errors found
Django version 1.3.1, using settings 'dss.settings'
Development server is running at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
[25/Nov/2011 23:00:47] "GET / HTTP/1.1" 200 2045

Is Solaris running in 64bit mode?

isainfo -v

Spine JS Framework

Spine

Cast a date to Unix timestamp in Postgres

'2012-04-01'::timestamp::abstime::int4

Detect an iPad and provide a non-Flash alternative

try{ ["iPad","iPod","iPhone"].each(

  function(i){

    if(navigator.userAgent.indexOf(i) > -1){

      //Do iPad stuff here

      }

   }); } catch(e){ var meh = 'meh'; }

Jython and Django

Chapter 14: Web Applications With Django — Jython Book v1.0 documentation

Groooooooooovy

Groovy - Home

Matrix Asset Map for iOS

Zed Said Studio - Squiz Matrix Asset Map for iOS

Textastic for iPad

Textastic Code Editor for iPad on the iTunes App Store

Alternately colour the rows in a table with jQuery

var color = '#efefef';

var counter = 0;

function switch_bg(counter){ 

    if(eval(counter/2) == eval(counter/2).toFixed(0)){ return color; } 

    else { return 'white'; } 

    }

jQuery('tbody tr').each(

	function(){ 
	
		counter++;  
		
		jQuery(this).find('td').each(
		
			function(){ 
			
				jQuery(this).css({ 'background-color' : switch_bg(counter) }); 
				
				}
			
			);
			
		}
			 
	);

Student class needs to be adjusted

	function get_hash_by_uun($uun){
		
		return $this->get_hash_by_id($this->get_id_by_uun($uun)); 
		
		}

	function get_id_by_uun($uun){

		$m = (int) str_replace('s', '', $uun);
		
		$reply = just::sql(sprintf("select student_id from student_full where matriculation_number = %d", $m));
		
		return $reply['first_row']['student_id'];		

		}
		
	function get_uun_by_id($id){
	
		$reply = just::sql(
			sprintf("select case
			when char_length(matriculation_number::varchar) = 5 then 's00'||matriculation_number
			when char_length(matriculation_number::varchar) = 6 then 's0'||matriculation_number
			else 's'||matriculation_number end as uun from student_full where student_id = %d", (int) $id)
			);
	
		return $reply['first_row']['uun'];
	
		}

Kill runaway Postgres threads

kill `ps -ef | grep [p]ostgres | awk '{print $2}'`