{Complexity}

Interview questions (2)

admin — Thu, 07 Jan 2010 05:51:49 +0000

1) There are integer arrays, A and B. what’s the best way to generate an array which contains all duplicated elements of A and B.
2) There are integer arrays, A and B. how to figure it out if those contain same elements.
3) There many of files in a folder and some of them contains phone numbers. how to find them.
4) Design restaurant reservation system. class design and data structures.

Spring MVC + Tiles

admin — Mon, 14 Dec 2009 02:14:54 +0000

1. create web.xml
action org.springframework.web.servlet.DispatcherServlet 1 action *.do

2. create action-servlet.xml


  

    

    
  

	

    
  

    

      med

    

    

      userMain

    

  
  

  

    

  
  

	

	  

	    

	      /WEB-INF/UrlMap.properties

	    

	  

    

  
  

    

      

        /WEB-INF/tiles-def.xml

3. create TestController
package com.bluewiseinc.erp.common.web; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

public class TestController extends MultiActionController { public ModelAndView testMain(HttpServletRequest request, HttpServletResponse response) throws Exception { return new ModelAndView("test/test_main", "testMain", null); } }

4. UrlMap.properties
## test module mapping /test/index.do=testController

5. tiles-def.xml
"-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN" "http://tiles.apache.org/dtds/tiles-config_2_0.dtd">

6. message.properties
# Page titles index.title=Test Spring MVC + Tiles

7. default.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %> <%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %> <%@ taglib prefix="tiles" uri="http://tiles.apache.org/tags-tiles" %> <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <fmt:message key="index.title"/>

Server Configuration Job Log

admin — Sun, 13 Dec 2009 22:12:34 +0000

Dell PowerEdge SC1420

Dell CERC SATA 1.5/6ch RAID Controller

Windows 2003 / MS SQL 2005 / Accpac ERP

1. Upgrade system BIOS, raid controller firmware on windows 2003

2. Attach a new hard disk and configure raid 0, virtual drive #1

3. Move all data on current D drive to new attached drive

4. Back up C partition as a image: Clonezilla

5. Reconfigure hard disk 1 & 2 as raid 1, virtual drive #0

6. Restore backed up C drive image to new reconfigured virtual drive #0

Linux Server Monitoring Tools

admin — Thu, 05 Nov 2009 03:33:27 +0000

- Network Monitoring
tcptrack
iptraf

- CPU, Memory Monitoring
top
free

- Disk I/O Monitoring
iostat(sysstat)

PHP Pear Image_Graph

admin — Tue, 01 Sep 2009 20:36:24 +0000

#apt-get install php-pear

#pear install Numbers_Words-0.16.1
#pear install Numbers_Roman-1.0.2
#pear install Image_Canvas-0.3.1
#pear install Image_Graph-0.7.2

(Download TrueType core fonts from http://corefonts.sourceforge.net/)
cp *.ttf /usr/share/php/Image/Canvas/Fonts

require_once '../../includes/include.php'; require_once 'Image/Graph.php'; require_once 'Image/Canvas.php'; date_default_timezone_set('America/New_York');


$customer_id = $_REQUEST[customer_id];

if (!$customer_id) exit();

$customer_data = get_order_customer_report_xy($customer_id);

if (!$customer_data) exit();
$Canvas =& Image_Canvas::factory('png', array('width' => 575, 'height' => 280));
// create the graph

$Graph =& Image_Graph::factory('graph', $Canvas);

// add a TrueType font

$Font =& $Graph->addNew('font', 'DejaVuSans');

$Font->setSize(8); 
$Graph->setFont($Font); 
// create the plotarea layout

$Graph->add(

    Image_Graph::vertical(

        Image_Graph::factory('title', array('', 11)),

        Image_Graph::vertical(

            $Plotarea = Image_Graph::factory('plotarea'),

            $Legend = Image_Graph::factory('legend'),

            90

        ),

        5

    )

);          
$Legend->setPlotarea($Plotarea);    
// create a grid and assign it to the secondary Y axis

$GridY2 =& $Plotarea->addNew('bar_grid', IMAGE_GRAPH_AXIS_Y_SECONDARY);

$GridY2->setFillStyle(

    Image_Graph::factory(

        'gradient',

        array(IMAGE_GRAPH_GRAD_VERTICAL, 'white', 'lightgrey')

    )

);     
list($year, $month) = split('[-.-]', $customer_data[0][1]);

$start=mktime(0,0,0,$month,1,$year);

$today=mktime(0,0,0,date('m'),1,date('Y'));

$interv=12-$month+(12*(date('Y')-$year-1))+date('m')+1;
// create a line plot

$Dataset1 =& Image_Graph::factory('dataset');

$Dataset2 =& Image_Graph::factory('dataset'); 
$max = 0;

for ($i=0; $i
        if ($max<$customer_data[$i][0]) $max=$customer_data[$i][0];

}

for ($i=0; $i<$interv; $i++) {

        $Dataset2->addPoint(date('m/y', mktime(0,0,0,$month,1,$year)), 0);

        $month++;

}

for ($i=0; $i
        list($year, $month) = split('[-.-]', $customer_data[$i][1]);

        $Dataset1->addPoint(date('m/y', mktime(0,0,0,$month,1,$year)), $customer_data[$i][0]);

}
$Plot1 =& $Plotarea->addNew('bar', array(&$Dataset1));

$Plot1->setLineColor('red'); 
$Plot2 =& $Plotarea->addNew(

    'Image_Graph_Plot_Area',

    $Dataset2,

    IMAGE_GRAPH_AXIS_Y_SECONDARY

); 
$Plot2->setLineColor('gray');

$Plot2->setFillColor('white@0.2'); 
$AxisX =& $Plotarea->getAxis(IMAGE_GRAPH_AXIS_X);

$labInterv = floor($interv / 13);

$AxisX->setLabelInterval($labInterv);

$AxisY =& $Plotarea->getAxis(IMAGE_GRAPH_AXIS_Y);

$AxisY->setTitle('Orders', 'vertical');

$AxisYsecondary =& $Plotarea->getAxis(IMAGE_GRAPH_AXIS_Y_SECONDARY);

// output the Graph $Graph->done(); db_close() ?>

Mount LVM disk

admin — Tue, 01 Sep 2009 19:03:57 +0000

#apt-get install lvm2

#pvscan
PV /dev/sdb1 VG server-roma lvm2 [136.49 GB / 0 free]
Total: 1 [136.49 GB] / in use: 1 [136.49 GB] / in no VG: 0 [0 ]

#vgscan
Reading all physical volumes. This may take a while…
Found volume group “server-roma” using metadata type lvm2

#vgchange -a y
2 logical volume(s) in volume group “server-roma” now active

#lvscan
ACTIVE ‘/dev/server-roma/root’ [130.91 GB] inherit
ACTIVE ‘/dev/server-roma/swap_1′ [5.58 GB] inherit

#mount /dev/server-roma/root /mnt

ubuntu server 9.04 grub menu.lst

admin — Tue, 01 Sep 2009 18:43:17 +0000

title Ubuntu 9.04, kernel 2.6.28-15-server