DZone Snippets: function code

ARGV Parser

Black_H (Black_H) — Sun, 03 Feb 2008 20:24:59 GMT

This function parse ARGV and return a string.
See exemples for more informations :

// Go : http://blackh.badfile.net/wordz/

Function :



  def options(param)

  

	i = 0

		ARGV.each  { |valeur|

		

    		if (valeur == '-' + param.to_s)

				return ARGV[i+1]

			elseif (valeur != '-' + param.to_s)

				return false

			end

		i += 1

		}

		

   end

Usage :

// cmd> ruby test.rb -o foo





	out =  self.options('o')



	if (out != false and out.empty? == false)

                   puts out # print -> foo

	end

Using the XSLT sum function

jrobertson (James Robertson) — Sat, 12 Jan 2008 11:41:08 GMT

This XML and XSLT code is an example of storing and displaying a car mileage log. Notably the XSLT sum() function displays the total no of miles.

file: car_log.xsl







    

      

    

            

        Total miles this month: 

        

      

    

    

    

    

      

        trip

        

          

        

          

        miles

        

          

        

          

        description

file: car_log.xml





  

    car_log

  

  

    Wed Dec 12 20:00:33 +0000 2007trip to the supermarket11.8my first trip with the GPS installed

    Fri Dec 14 11:45:09 +0000 2007driving around the park26.1

    Thu Dec 20 01:21:27 +0000 2007trip to the supermarket 8.5

    Thu Dec 20 01:34:26 +0000 2007visiting parents12.7

output



Total miles this month: 59.1

...

create and call an oracle function

davetrane (David Davis) — Wed, 06 Jun 2007 21:22:16 GMT



create or replace function "ORACLE_FOO"

(foo_arg1 in NUMBER)

return NUMBER

is

rt NUMBER := 0;

begin

  IF foo_arg1 > 1 THEN

    SELECT 1 INTO rt;

  ELSE

    SELECT 2 INTO rt;

  END IF;

  RETURN (rt);

end;



SELECT ORACLE_FOO(1) FROM dual;

Validate email and domain

shantanuo (shantanu oak) — Tue, 15 May 2007 07:48:44 GMT

// Vlidate email and domain name





function validate_email($email){



$exp = "^[a-z\'0-9]+([._-][a-z\'0-9]+)*@([a-z0-9]+([._-][a-z0-9]+))+$";



if(eregi($exp,$email)){

	if(checkdnsrr(array_pop(explode("@",$email)),"MX")){

		print("$email is ok.
");

			}else{

			print("$email is ok. But domain is not.
");

			}

				}else{

				print("$email is not ok.
");

				}   

}



validate_email("shantanu.ok");

validate_email("shantanu.ok@gmail.com");

validate_email("shantanu.ok@fsjaldkfjlsfjsljflsfjsldk.com");



?>

PHP Copyright Updater

GreyFox (Evan Walsh) — Fri, 09 Mar 2007 22:41:51 GMT

// PHP Copyright Updater
// by Evan Walsh
// NothingConcept.com

This code will automatically change the copyright on your site as the year changes. Tested and approved by me.

Just call this in one of your PHP files by including the file with this code in it:



//Licensed under the GPL v2

//by Evan Walsh of nothingconcept.com

function copyright($site,$year) {

    $current = date(Y);

    if($year == $current) { $eyear = $year; }

    else { $eyear = "$year - $current"; }

    echo "All content © $eyear $site";

}

?>

Example:

Then place or something similar in the place you want the copyright to display.

Simple as that.

Particle Swarm Optimization

bugmenot (BugMeNot) — Fri, 19 Jan 2007 00:14:49 GMT

Particle Swarm Optimization written in Python, more infos and a pretty printer here : http://www.biais.org/blog/index.php/2007/01/14/13-metaheuristic-particle-swarm-optimization-pso-in-python



# Particle swarm optimization

# Maxime Biais : 



from random import uniform

 

class PSO:

    def __init__(self, pop_size, min, max, phi, phi2, lr, maxiter, func):

        self.func = func

        self.pop = []

        # 0: position, 1: velocity, 2: fitness

        self.min = min

        self.max = max

        for i in xrange(pop_size):

            self.pop.append([uniform(self.min, self.max), 

                                   uniform(-1, 1), 0])

        self.evaluate()

        self.gdest = self.pop[0]

        self.pdest = self.pop[0]

        self.phi = phi

        self.phi2 = phi2

        self.lr = lr

        self.maxiter = maxiter

    

    def update_velocity(self):

        for i in self.pop:

            i[1] = self.lr * i[1] + uniform(0, self.phi) \

                    * (self.pdest[0] - i[0]) + uniform(0, self.phi2) \

                    * (self.gdest[0] - i[0])

 

    def evaluate(self):

        for i in self.pop:

            i[2] = self.func(i[0])

 

    def move(self):

        for i in self.pop:

            i[0] += i[1]

 

    def __cmp_by_fitness(self, a, b):

        return cmp(a[2], b[2])

    

    def run(self, update_func=False):

        for i in xrange(self.maxiter):

            if update_func:

                update_func()

            self.update_velocity()

            self.move()

            self.evaluate()

            self.pop.sort(self.__cmp_by_fitness, reverse=0)

            self.pdest = self.pop[0]

            if self.pdest[2] < self.gdest[2]:

                self.gdest = self.pdest

PHP: Dynamically call a function from list of allowed actions

alexwilliams (Alex Williams) — Wed, 03 Jan 2007 12:15:14 GMT

This function simply calls another function based on the argument, assuming that argument ($action) is in the "allowed" list of actions.

settings-config.php



$settings['actions'] = "list,view,delete,update";

Catalog-class.php



public function process_action($action) {

	global $settings;

	

	$allowed_actions = explode(",",$settings['actions']);

	if (is_numeric(array_search($action, $allowed_actions))) {

		$f_name = "product_" . $action;

		$this->$f_name();

	} else {

		$this->error_msg = 'ACTION_NOT_ALLOWED';

	}

}

private function product_list() {

}

private function product_view() {

}

private function product_delete() {

}

private function product_update() {

}

private function product_create() {

}

Even if product_create() exists, if you do process_action('create'), it will not work... it's basically like a function wrapper.. or something like that...

UPDATE: Yes I know I could have created an array like $settions['actions'] = array('list','view','delete','update'); but I've modified this code a bit for snippet/display purposes... anyways this is just a reminder for myself, not of actual use or interest for others... comments are welcome though :D

PyS60 - DaemonS60

whitetiger () — Tue, 19 Dec 2006 23:56:06 GMT

// description of your code here



import appuifw

import e32

import thread



lock = e32.Ao_lock()

lockTHR = thread.allocate_lock()



###### Sostituisci questa funzione con quello che vuoi fare eseguire

i = 0

def funzDaemon():

	global i

	while(1):

		lockTHR.acquire()

		e32.ao_sleep(1)

		open('E:\\Others\\tmp.txt', 'a').write(str(i)+"\n")

		i+=1

		lockTHR.release()

####################################################################



appuifw.app.title = u'DaemonS60'

appuifw.app.exit_key_handler = lambda:lock.signal()



print 'DaemonS60 - Start'



thread.start_new_thread(funzDaemon, ())



lock.wait()



print 'DaemonS60 - Stop'

Just #@$% do it!

ttmrichter (Michael T. Richter) — Mon, 04 Dec 2006 17:32:15 GMT

If you have an unreliable network feed and want to run something like rsync, scp, etc. without having to babysit it a simple function can be used to prefix a command. The function looks like this:



# Function to force a command to try until it works.

# Name means "JUST #@$% DO IT!"

JFDI () {

  COMMAND=$*

  while ! $COMMAND ; do echo "Retrying..." ; done

}

Using it is simplicity itself:



# command that can fail and annoy

rsync -avz /my/local/directory/ myuser@host:~/my/remote/directory/



# command that won't give up ever

JFDI rsync -avz /my/local/directory/ myuser@host:~/my/remote/directory/

Functions, that returns more

warona (ak) — Sun, 26 Nov 2006 17:16:02 GMT

// Self explaining.



function return_more() {

	return array('first', 'second');

}



list($ret1, $ret2) = return_more();



echo $ret1.'
';

echo $ret2.'
';