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First Ever MySQL on Windows Online Forum - March 16, 2011

- by monica.kumar

72 1024x768 Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Cambria","serif";} Now you might be thinking…what’s an Online Forum? Well, think of it as a virtual conference, where you can attend a series of presentations about a given topic, from the comfort of your own office/home. On Wednesday March 16th, from 9.00 am PT to 12.00, we will be running the first ever MySQL Online Forum, dedicated to MySQL on Windows. Register now to learn how you can reduce your database TCO on Windows by up to 90% while increasing manageability & flexibility! Oracle’s MySQL Vice President of Engineering Tomas Ulin will kick off a comprehensive agenda of presentations enabling you to better understand: How you can save up to 90% by using MySQL on WindowsWhy the world’s most popular open source database is extremely popular on Windows, both for enterprise users and for embedding by ISVs How MySQL is a great fit for the Windows environment, and what are the upcoming milestones to make MySQL even better on the Microsoft platform What are the visual tools at your disposal to effectively develop, deploy and manage MySQL applications on Windows How you can deliver highly available business critical Windows based MySQL applications Why Security Solutions Provider SonicWall selected MySQL over Microsoft SQL Server, and how they successfully deliver MySQL based solutions Plus, as we’ll have Live Chat On during the entire forum, you’ll be able to ask questions at any time to MySQL experts online. Register Now! Whether you’re an ISV or an enterprise user, either already running MySQL on Windows or simply considering it, join us and learn how you can get performance, lower TCO and increased manageability & flexibility with MySQL on Windows!

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How to attach a sprite to a TMXTiledMap at a particular coordinate, in AndEngine?

- by shailenTJ

I am trying to add a sprite at a "grid" location on the tiled map. The TMX tiled Map is like a grid, and you can access the size of the grid by calling mTMXtiledMap.getTileRows() and mTMXtiledMap.getTileColumns(). I want to add an object at grid location, say (2, 5). My tileMap is of size (10,10). How can I do that? There is no function like mTMXTiledMap.addChild(int x, int y, Entity mEntity). I would appreciate any suggestions!

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The Template Method Design Pattern using C# .Net

- by nijhawan.saurabh

First of all I'll just put this pattern in context and describe its intent as in the GOF book: Template Method: Define the skeleton of an algorithm in an operation, deferring some steps to Subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the Algorithm's Structure. Usage: When you are certain about the High Level steps involved in an Algorithm/Work flow you can use the Template Pattern which allows the Base Class to define the Sequence of the Steps but permits the Sub classes to alter the implementation of any/all steps. Example in the .Net framework: The most common example is the Asp.Net Page Life Cycle. The Page Life Cycle has a few methods which are called in a sequence but we have the liberty to modify the functionality of any of the methods by overriding them. Sample implementation of Template Method Pattern: Let's see the class diagram first: Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt; mso-ligatures:standard;} And here goes the code:EmailBase.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 public abstract class EmailBase 10 { 11 12 public bool SendEmail() 13 { 14 if (CheckEmailAddress() == true) // Method1 in the sequence 15 { 16 if (ValidateMessage() == true) // Method2 in the sequence 17 { 18 if (SendMail() == true) // Method3 in the sequence 19 { 20 return true; 21 } 22 else 23 { 24 return false; 25 } 26 27 } 28 else 29 { 30 return false; 31 } 32 33 } 34 else 35 { 36 return false; 37 38 } 39 40 41 } 42 43 protected abstract bool CheckEmailAddress(); 44 protected abstract bool ValidateMessage(); 45 protected abstract bool SendMail(); 46 47 48 } 49 } 50 EmailYahoo.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 public class EmailYahoo:EmailBase 10 { 11 12 protected override bool CheckEmailAddress() 13 { 14 Console.WriteLine("Checking Email Address : YahooEmail"); 15 return true; 16 } 17 protected override bool ValidateMessage() 18 { 19 Console.WriteLine("Validating Email Message : YahooEmail"); 20 return true; 21 } 22 23 24 protected override bool SendMail() 25 { 26 Console.WriteLine("Semding Email : YahooEmail"); 27 return true; 28 } 29 30 31 } 32 } 33 EmailGoogle.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 public class EmailGoogle:EmailBase 10 { 11 12 protected override bool CheckEmailAddress() 13 { 14 Console.WriteLine("Checking Email Address : GoogleEmail"); 15 return true; 16 } 17 protected override bool ValidateMessage() 18 { 19 Console.WriteLine("Validating Email Message : GoogleEmail"); 20 return true; 21 } 22 23 24 protected override bool SendMail() 25 { 26 Console.WriteLine("Semding Email : GoogleEmail"); 27 return true; 28 } 29 30 31 } 32 } 33 Program.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 class Program 10 { 11 static void Main(string[] args) 12 { 13 Console.WriteLine("Please choose an Email Account to send an Email:"); 14 Console.WriteLine("Choose 1 for Google"); 15 Console.WriteLine("Choose 2 for Yahoo"); 16 string choice = Console.ReadLine(); 17 18 if (choice == "1") 19 { 20 EmailBase email = new EmailGoogle(); // Rather than newing it up here, you may use a factory to do so. 21 email.SendEmail(); 22 23 } 24 if (choice == "2") 25 { 26 EmailBase email = new EmailYahoo(); // Rather than newing it up here, you may use a factory to do so. 27 email.SendEmail(); 28 } 29 } 30 } 31 } 32 Final Words: It's very obvious that why the Template Method Pattern is a popular pattern, everything at last revolves around Algorithms and if you are clear with the steps involved it makes real sense to delegate the duty of implementing the step's functionality to the sub classes. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt; mso-ligatures:standard;}

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Projected Results: Sound project management practices, combined with a complete technology platform, have an immediate and lasting impact on an organization’s bottom line.

- by Melissa Centurio Lopes

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Article By: Alan Joch, is a business and technology writer who specializes in enterprise applications, cloud computing, mobile computing, and the Web. It’s no secret that complex, large-scale projects need close management controls to ensure that they’re delivered on time and on budget. But now there’s growing evidence that failing to meet these goals can have far-reaching consequences, not only for the reputations and value of individual organizations but also for the tenure of their top executives. Government watchdogs forced one large contractor to suspend a multibillion-dollar defense program—and delay payment receipts—until a better management system was launched to more accurately track spending, project milestones, and other fundamental metrics. Significant delays in the opening of the £4.3 billion Terminal 5 at Heathrow Airport impaired an airline’s operations and contributed to a drop in its share prices. These real-world examples are noteworthy because of the huge financial risks they created. They’re also far from being isolated cases. Research by the Economist Intelligence Unit found that only 11 percent of companies claimed they delivered expected ROI on major capital projects 90 percent of the time or more. In addition, 12 percent of respondents said they achieved planned ROI less than half the time. According to Phil Thornton, lead consultant at the analyst firm Clarity Economics, the numbers demonstrate obvious challenges related to managing risks, accurately predicting ROI, and consistently delivering bottom-line growth for major capital investments “Portfolio management is a path to improve your organization’s competitive advantage. It helps make sure your organization is investing in the right things and not spending its time on things that are not delivering the intended results for the firm.” Read the full article here

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Error java.lang.OutOfMemoryError: getNewTla using Oracle EPM products

- by Marc Schumacher

Running into a Java out of memory error, it is very common behaviour in the field that the Java heap size will be increased. While this might help to solve a heap space out of memory error, it might not help to fix an out of memory error for the Thread Local Area (TLA). Increasing the available heap space from 1 GB to 16 GB might not even help in this situation. The Thread Local Area (TLA) is part of the Java heap, but as the name already indicates, this memory area is local to a specific thread so there is no need to synchronize with other threads using this memory area. For optimization purposes the TLA size is configurable using the Java command line option “-XXtlasize”. Depending on the JRockit version and the available Java heap, the default values vary. Using Oracle EPM System (mainly 11.1.2.x) the following setting was tested successfully: -XXtlasize:min=8k,preferred=128k More information about the “-XXtlasize” parameter can be found in the JRockit documentation: http://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/refman/optionXX.html

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How do you dive into large code bases?

- by miku

What tools and techniques do you use for exploring and learning an unknown code base? I am thinking of tools like grep, ctags, unit-tests, functional test, class-diagram generators, call graphs, code metrics like sloccount and so on. I'd be interested in your experiences, the helpers you used or wrote yourself and the size of the codebase, with which you worked with. I realize, that this is also a process (happening over time) and that learning can mean "can give a ten minute intro" to "can refactor and shrink this to 30% of the size". Let's leave that open for now.

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MySQL Enterprise Backup 3.8.2 - Overview

- by Priya Jayakumar

MySQL Enterprise Backup (MEB) is the ideal solution for backing up MySQL databases. MEB 3.8.2 is released in June 2013. MySQL Enterprise Backup 3.8.2 release’s main goal is to improve usability. With this release, users can know the progress of backup completed both in terms of size and as a percentage of the total. This release also offers options to be able to manage the behavior of MEB in case the space on the secondary storage is completely exhausted during backup. The progress indicator is a (short) string that indicates how far the execution of a time-consuming MEB command has progressed. It consists of one or more "meters" that measures the progress of the command. There are two options introduced to control the progress reporting function of mysqlbackup command (1) –show-progress (2) –progress-interval. The user can control the progress indicator by using “--show-progress” option in any of the MEB operations. This option instructs MEB to output periodically short reports on the progress of time-consuming commands. The argument of this option instructs where the output could be sent. For example it could be stderr, stdout, file, fifo and table. With the “--show-progress” option both the total size of the backup to be copied and the size that’s already copied will be shown. Along with this, the state of the operation for example data or meta-data being copied or tables being locked and other such operations will also be reported. This gives more clear information to the DBA on the progress of the backup that’s happening. Interval between progress report in seconds is controlled by “--progress-interval” option. For more information on this please refer progress-report-options. MEB can also be accessed through GUI from MySQL WorkBench’s next version. This can be used as the front end interface for MEB users to perform backup operations at the click of a button. This feature was highly requested by DBAs and will be very useful. Refer http://insidemysql.com/mysql-workbench-6-0-a-sneak-preview/ for WorkBench upcoming release info. Along with the progress report feature some of the important issues like below are also addressed in MEB 3.8.2. In MEB 3.8.2 a new command line option “--on-disk-full” is introduced to abort or warn the user when a backup process encounters a full disk condition. When no option is given, by default it would abort. A few issues related to “incremental-backup” are also addressed in this release. Please refer 3.8.2 documentation for more details. It would be good for MEB users to move to 3.8.2 to take incremental backups. Overall the added usability and the important defects fixed in this release makes MySQL Enterprise Backup 3.8.2 a promising release.

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Why doesn't the Visual Studio C compiler like this? [migrated]

- by justin

The following code compiles fine on Linux using gcc -std=c99 but gets the following errors on the Visual Studio 2010 C compiler: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86 Copyright (C) Microsoft Corporation. All rights reserved. fib.c fib.c(42) : error C2057: expected constant expression fib.c(42) : error C2466: cannot allocate an array of constant size 0 fib.c(42) : error C2133: 'num' : unknown size The user inputs the amount of Fibonacci numbers to generate. I'm curious as to why the Microsoft compiler doesn't like this code. http://pastebin.com/z0uEa2zw

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June IOUG events

- by Mandy Ho

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Independent Oracle User Group (IOUG) Regional Events: June 11-12, 2012 – Broomfield, CO 2-Day Seminar- “ High Performance PL/SQL & Oracle Database 11g New Features” Steven Feuerstein, generally considered the world’s leading PL/SQL expert, will be presenting his all-new, 2-day, “Higher Performance PL/SQL and Oracle 11g PL/SQL New Features” seminar on June 11 & 12 at Level 3 Communications in Broomfield, Colorado. This will be Steven’s first Denver seminar in almost 4 years. Who knows when he will offer another? http://www.rmoug.org/ June 14, 2012 – Ottawa, Ontario Pythian’s Gwen Shapira puts on 3 great presentations focused on NoSQL, making OLTP run fast and Big Data. http://www.oug-ottawa.org/pls/htmldb/f?p=327:27:1317735724699447::NO June 21, 2012 – Calgary, Alberta Big Data and Extreme Analytics Summit http://coug.ab.ca/ June 22, 2012 – Westborough, MA 10 Things You Probably Did Not Know? With Tom Kyte PL/SQL turns 23 years old this year. It was first introduced in 1988 with Oracle6 Database. This session looks at five technical things about PL/SQL you probably did not know: under-the-covers features that make PL/SQL quite simply the most efficient language with which to process data in the database. http://noug.com/ June 28/29, 2012 – Plano, Texas Jonathan Lewis Oracle Performance Seminars The DOUG (DALLAS ORACLE USERS GROUP) has invited SpeakTech to return to Dallas, and they’re bringing Jonathan Lewis! Topics are Beating the Oracle Optimizer – June 28, 2012, Trouble Shooting & Tuning – June 29, 2012 http://www.eventbrite.com/event/3082448687

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xsltproc killed, out of memory

- by David Parks

I'm trying to split up a 13GB xml file into small ~50MB xml files with this XSLT style sheet. But this process kills xsltproc after I see it taking up over 1.7GB of memory (that's the total on the system). Is there any way to deal with huge XML files with xsltproc? Can I change my style sheet? Or should I use a different processor? Or am I just S.O.L.? <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" xmlns:exsl="http://exslt.org/common" extension-element-prefixes="exsl" xmlns:fn="http://www.w3.org/2005/xpath-functions"> <xsl:output method="xml" indent="yes"/> <xsl:strip-space elements="*"/> <xsl:param name="block-size" select="75000"/> <xsl:template match="/"> <xsl:copy> <xsl:apply-templates select="mysqldump/database/table_data/row[position() mod $block-size = 1]" /> </xsl:copy> </xsl:template> <xsl:template match="row"> <exsl:document href="chunk-{position()}.xml"> <add> <xsl:for-each select=". | following-sibling::row[position() < $block-size]" > <doc> <xsl:for-each select="field"> <field> <xsl:attribute name="name"><xsl:value-of select="./@name"/></xsl:attribute> <xsl:value-of select="."/> </field> <xsl:text>
</xsl:text> </xsl:for-each> </doc> </xsl:for-each> </add> </exsl:document> </xsl:template>

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Customizing Flowcharts in Oracle Tutor

- by [email protected]

Today we're going to look at how you can customize the flowcharts within Oracle Tutor procedures, and how you can share those changes with other authors within your company. Here is an image of a flowchart within a Tutor procedure with the default size and color scheme. You may want to change the size of your flowcharts as your end-users might have larger screens or need larger fonts. To change the size and number of columns, navigate to Tutor Author Author Options Flowcharts. The default is to have 4 columns appear in each flowchart, but, if I change it to six, my end-users will see a denser flowchart. This might be too dense for my end-users, so I will change it to 5 columns, and I will also deselect the option to have separate task boxes. Now let's look at how to customize the colors. Within the Flowchart options dialog, there is a button labeled "Colors." This brings up a dialog box of every object on a Tutor flowchart, and I can modify the color of each object, as well as the text within the object. If I click on the background, the "page" object appears in the Item field, and now I can customize the color and the title text by selecting Select Fill Color and/or Select Text Color. A dialog box with color choices appears. If I select Define Custom Colors, I can make my selections even more precise. Each time I change the color of an object, it appears in the selection screen. When the flowchart customization is finished, I can save my changes by naming the scheme. Although the color scheme I have chosen is rather silly looking, perhaps I want others to give me their feedback and make changes as they wish. I can share the color scheme with them by copying the FCP.INI file in the Tutor\Author directory into the same directory on their systems. If the other users have color schemes that they do not want to lose, they can copy the relevant lines from the FCP.INI file into their file. If I flowchart my document with the new scheme, I can see how it looks within the document. Sometimes just one or two changes to the default scheme are enough to customize the flowchart to your company's color palette. I have seen customers who have only changed the Start object to green and the End object to red, and I've seen another customer who changed every object to some variant of black and orange. Experiment! And let us know how you have customized your flowcharts. Mary R. Keane Senior Development Director, Oracle Tutor

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Engineered Systems: Oracle schlägt drei Fliegen mit einer Klappe

- by A&C Redaktion

Normal 0 21 false false false DE X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Die News aus dem Partnergeschäft von Oracle sorgen für Schlagzeilen im Magazin ChannelPartner. Über den neuen Fokus auf Engineered Systems und die SMB Appliances heißt es dort, so könne Oracle „drei Fliegen mit einer Klappe schlagen“: Erstens wird früheren Sun Hardware-Resellern der Einstieg ins Software-Geschäft erleichtert, zweitens bieten die Appliances neue Möglichkeiten für den Mittelstand und drittens bekräftigt die Strategie das zweistufige Channel-Modell. Dazu Silvia Kaske, Senior Director Channel Sales & Alliances Oracle Deutschland: "Wir stärken weltweit den Channel, weil das SMB-Geschäft zunehmend anzieht." Neben der durchaus positiven Wertung der Channel-Strategie bietet der Artikel einen anschaulichen Überblich darüber, was Engineered Systems eigentlich sind. Außerdem werden die Einsatzmöglichkeiten (Big Data, Mobile Computing, Cloud etc.) und Angebote von Oracle in diesem Bereich dargestellt und diskutiert. Das Highlight hierbei ist – wen wundert’s – die Oracle Database Appliance. Mit dem Portfolio wächst natürlich auch die Zahl der Spezialisierungen. Logisch, findet Silvia Kaske: "Endkunden erwarten keine Generalisten, sondern Spezialisten. Nur mit einem klaren Fokus wird der Partner erfolgreich sein". Hier geht’s zum vollständigen CP-Artikel unter dem Titel „Oracle lockt Channel mit SMB-Appliances“.

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How to list missing partitions?

- by celebrimbor

I have installed Ubuntu on one of my partition and Crunchbang on the other partition. As I wanted to make some continuous space, I moved Crunchbang partition and then checked fdisk output which looks like this Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc7996dfa Device Boot Start End Blocks Id System /dev/sda1 * 63 80324 40131 de Dell Utility /dev/sda4 81918 625139711 312528897 f W95 Ext'd (LBA) /dev/sda5 81920 211816447 105867264 83 Linux /dev/sda6 299100160 341043199 20971520 83 Linux /dev/sda7 341045248 625139711 142047232 7 HPFS/NTFS/exFAT I cannot see sda2 and sda3 partition. How to find them?

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Downloading large files hangs system

- by Igor

When Im trying to download large files, i.e. 1gb or more under FireFox, first of all it starts with very big download speed and in few seconds in almost get up to max (~11 MBps). It is downloading very fast, but when downloaded size becomes near 700-800mb and more, my system almost completely hangs, so I can do nothing - I just have to wait until it finishes downloading. Also when it hangs, I can't see the download progress - it looks like it completely hangs. Sometimes, however, if the file size is near 1gb, the system comes back from hang, finishing download, but sometimes I just cant wait before system comes back and have to kill FF from top (it takes me 2 minutes to do this, because of very slow system performance). I use Firefox as primary browser. If I use wget with direct link to file - everything is fine. Speed at max, no performance decrease. So what can I do?

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IE9 Loses Some CSS After Particular Form Submit [migrated]

- by Asherion

The site I am editing has a search form. For the record, there are several other forms on the site, contact and the like. This is the only one with an issue. Upon submission of the form, SOME of the styling is lost in IE9 (possibly other versions of IE, haven't tested that yet). Primarily, the margins and colors set in html and body appear to have been lost. Menus, banner, text, etc all appear to retain styles. All styles are on one sheet, that are used here... Any helpful advice? Here is the contents of the search page and the php used to check for the form, if that helps, and the css that I think is lost. THE HTML: <div id="search"> <br /> <div style="float:right;font-size:.8em;"> <form name="form_sidesearch" action="search.html" method="post"> <input type="hidden" name="action" value="search" /> <input type="text" name="search_value" value="<?php echo $systems_primary->search_value ?>" /> <input type="submit" name="submit_search" value="Search Website" /> </form> <br /> </div> </div> <?php echo stripslashes($search_results); THE PHP: <?php // -- Begin Search -------------------------------------------------------------------------------------- if($_REQUEST["action"] === "search") { if(strlen($_REQUEST["pg"]) <= 0) { $_REQUEST["pg"] = 1; } $search_results = $systems_primary->search_website("index",urldecode($_REQUEST["search_value"]),"<div class=\"listing ui-corner-all\"><a href=\"{ENTRY_URL}\" title=\"{ENTRY_TITLE}\" class=\"listing_title\">{ENTRY_TITLE}</a>{ENTRY_CONTENT} <a href=\"{ENTRY_URL}\" title=\"{ENTRY_TITLE}\" style=\"font-size:.8em;\">...read more</a></div><br /><br />",345,"all",10,$_REQUEST["pg"]); } // -- End Search ---------------------------------------------------------------------------------------- ?> THE LOST CSS (could be more): html { background-color:#F6E6C8; font-size:16px; font:Helvetica; } body { width:1027px; margin:0 auto; background-color:#ffffff; font: arial, times new roman, sans-serif; }

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How do you dive into large code bases?

- by miku

What tools and techniques do you use for exploring and learning an unknown code base? I am thinking of tools like grep, ctags, unit-tests, functional test, class-diagram generators, call graphs, code metrics like sloccount and so on. I'd be interested in your experiences, the helpers you used or wrote yourself and the size of the codebase, with which you worked with. I realize, that this is also a process (happening over time) and that learning can mean "can give a ten minute intro" to "can refactor and shrink this to 30% of the size". Let's leave that open for now.

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Ubuntu btrfs: how to remove rootflags=subvol=@ from grub.cfg

- by mnpria

When i mount "btrfs" as a root filesytem, the mount info is as below: root@ubuntu1304Btrfs:~# mount /dev/mapper/ubuntu1304Btrfs--vg-root on / type btrfs (rw,subvol=@) Is there a way to have a mount info without the "subvol" information ? I have tried executing what was mentioned here. I also updated the grub.cfg. Still rootflags=subvol=@ is not removed. Is there a way to remove this subvol information ? root@ubuntu1304Btrfs:/home# mount /dev/mapper/ubuntu1304Btrfs--vg-root on / type btrfs (rw,subvol=@) /dev/mapper/ubuntu1304Btrfs--vg-root on /home type btrfs (rw,subvol=@home) root@ubuntu1304Btrfs:/# stat / File: ‘/’ Size: 262 Blocks: 0 IO Block: 4096 directory Device: 12h/18d Inode: 256 Links: 1 Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2013-11-11 19:56:04.548121873 +0530 Modify: 2013-11-11 19:55:18.008120103 +0530 Change: 2013-11-11 19:55:18.008120103 +0530 Birth: - root@ubuntu1304Btrfs:/# stat /home/ File: ‘/home/’ Size: 230 Blocks: 0 IO Block: 4096 directory Device: 19h/25d Inode: 256 Links: 1 Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2013-11-12 12:24:52.346377976 +0530 Modify: 2013-11-12 12:24:50.338377900 +0530 Change: 2013-11-12 12:24:50.338377900 +0530 Birth: -

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Smarter Ways to Unlock Your Unused Contingency Budgets

- by Melissa Centurio Lopes

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Cash flow is becoming increasingly important in the current economy; senior executives are looking for smarter ways of unlocking unused funds for new or ongoing capital expenditure projects. With project contingency budgets on average equaling 10 percent of overall costs, are you confident that you can release this cash without risking existing investments or the health of your overall project portfolio? This is the central question posed in a new report from the EPPM board, Hedging Your Bets? Optimizing Investment Opportunities for Great Cash Flow. The board is Oracle’s international steering committee, which brings together senior figures from leading organizations to discuss the critical role of enterprise project portfolio management (EPPM). C-Level Visibility Will Unlock Funds In addition to exploring how unlocking your contingency funds enables you to augment your cash flow (without resorting to expensive borrowing), the report offers a number of suggestions on how this can be done in a risk-free way, including Building an effective governance framework that shows the demonstrable value of every project within the portfolio Undertaking contingency planning risk assessments that give you complete portfolio wide visibility into all risk factors Establishing executive ownership of the portfolio to promote a more realistic appreciation of the risk levels inherent in the portfolio Creating a chief risk officer role that can review consolidated contingencies and risks so they are not considered in isolation The overriding message behind the report—and the work carried out by the EPPM board—is the need for increased C-level visibility across the entire enterprise project portfolio to enable better business decisions. Read the complete report in English, Chinese, German, or French. Read more in the October Edition of the quarterly Information InDepth EPPM Newsletter

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How to mount a hidden NTFS WinRE which are on an external HDD

- by annabinna

A friend have given me her external hard drive which contains a backup of his Windows data. The disk has two NTFS partitions, once of them tagged as WinRe. When I do fdisk -lu I get Disk /dev/sdc: 120.0 GB, 120034123776 bytes 255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x59725972 Dispositiu Arrenc. Inici Final Blocs Id Sistema /dev/sdc1 2048 3074047 1536000 27 Hidden NTFS WinRE /dev/sdc2 * 3074048 234438655 115682304 7 HPFS/NTFS/exFAT I never fought against this type of partitions and I haven't any idea of how to mount this and recover the data. Can someone help me?

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Working with packed dates in SSIS

- by Jim Giercyk

One of the challenges recently thrown my way was to read an EBCDIC flat file, decode packed dates, and insert the dates into a SQL table. For those unfamiliar with packed data, it is a way to store data at the nibble level (half a byte), and was often used by mainframe programmers to conserve storage space. In the case of my input file, the dates were 2 bytes long and represented the number of days that have past since 01/01/1950. My first thought was, in the words of Scooby, Hmmmmph? But, I love a good challenge, so I dove in. Reading in the flat file was rather simple. The only difference between reading an EBCDIC and an ASCII file is the Code Page option in the connection manager. In my case, I needed to use Code Page 1140 for EBCDIC (I could have also used Code Page 37). Once the code page is set correctly, SSIS can understand what it is reading and it will convert the output to the default code page, 1252. However, packed data is either unreadable or produces non-alphabetic characters, as we can see in the preview window. Column 1 is actually the packed date, columns 0 and 2 are the values in the rest of the file. We are only interested in Column 1, which is a 2 byte field representing a packed date. We know that 2 bytes of packed data can be stored in 1 byte of character data, so we are working with 4 packed digits in 2 character bytes. If you are confused, stay tuned….this will make sense in a minute. Right-click on your Flat File Source shape and select “Show Advanced Editor”. Here is where the magic begins. By changing the properties of the output columns, we can access the packed digits from each byte. By default, the Output Column data type is DT_STR. Since we want to look at the bytes individually and not the entire string, change the data type to DT_BYTES. Next, and most important, set UseBinaryFormat to TRUE. This will write the HEX VALUES of the output string instead of writing the character values. Now we are getting somewhere! Next, you will need to use a Data Conversion shape in your Data Flow to transform the 2 position byte stream to a 4 position Unicode string containing the packed data. You need the string to be 4 bytes long because it will contain the 4 packed digits. Here is what that should look like in the Data Conversion shape: Direct the output of your data flow to a test table or file to see the results. In my case, I created a test table. The results looked like this: Hold on a second! That doesn't look like a date at all. No, of course not. It is a hex number which represents the days which have passed between 01/01/1950 and the date. We have to convert the Hex value to a decimal value, and use the DATEADD function to get a date value. Luckily, I have created a function to convert Hex to Decimal: -- ============================================= -- Author: Jim Giercyk -- Create date: March, 2012 -- Description: Converts a Hex string to a decimal value -- ============================================= CREATE FUNCTION [dbo].[ftn_HexToDec] ( @hexValue NVARCHAR(6) ) RETURNS DECIMAL AS BEGIN -- Declare the return variable here DECLARE @decValue DECIMAL IF @hexValue LIKE '0x%' SET @hexValue = SUBSTRING(@hexValue,3,4) DECLARE @decTab TABLE ( decPos1 VARCHAR(2), decPos2 VARCHAR(2), decPos3 VARCHAR(2), decPos4 VARCHAR(2) ) DECLARE @pos1 VARCHAR(1) = SUBSTRING(@hexValue,1,1) DECLARE @pos2 VARCHAR(1) = SUBSTRING(@hexValue,2,1) DECLARE @pos3 VARCHAR(1) = SUBSTRING(@hexValue,3,1) DECLARE @pos4 VARCHAR(1) = SUBSTRING(@hexValue,4,1) INSERT @decTab VALUES (CASE WHEN @pos1 = 'A' THEN '10' WHEN @pos1 = 'B' THEN '11' WHEN @pos1 = 'C' THEN '12' WHEN @pos1 = 'D' THEN '13' WHEN @pos1 = 'E' THEN '14' WHEN @pos1 = 'F' THEN '15' ELSE @pos1 END, CASE WHEN @pos2 = 'A' THEN '10' WHEN @pos2 = 'B' THEN '11' WHEN @pos2 = 'C' THEN '12' WHEN @pos2 = 'D' THEN '13' WHEN @pos2 = 'E' THEN '14' WHEN @pos2 = 'F' THEN '15' ELSE @pos2 END, CASE WHEN @pos3 = 'A' THEN '10' WHEN @pos3 = 'B' THEN '11' WHEN @pos3 = 'C' THEN '12' WHEN @pos3 = 'D' THEN '13' WHEN @pos3 = 'E' THEN '14' WHEN @pos3 = 'F' THEN '15' ELSE @pos3 END, CASE WHEN @pos4 = 'A' THEN '10' WHEN @pos4 = 'B' THEN '11' WHEN @pos4 = 'C' THEN '12' WHEN @pos4 = 'D' THEN '13' WHEN @pos4 = 'E' THEN '14' WHEN @pos4 = 'F' THEN '15' ELSE @pos4 END) SET @decValue = (CONVERT(INT,(SELECT decPos4 FROM @decTab))) + (CONVERT(INT,(SELECT decPos3 FROM @decTab))*16) + (CONVERT(INT,(SELECT decPos2 FROM @decTab))*(16*16)) + (CONVERT(INT,(SELECT decPos1 FROM @decTab))*(16*16*16)) RETURN @decValue END GO Making use of the function, I found the decimal conversion, added that number of days to 01/01/1950 and FINALLY arrived at my “unpacked relative date”. Here is the query I used to retrieve the formatted date, and the result set which was returned: SELECT [packedDate] AS 'Hex Value', dbo.ftn_HexToDec([packedDate]) AS 'Decimal Value', CONVERT(DATE,DATEADD(day,dbo.ftn_HexToDec([packedDate]),'01/01/1950'),101) AS 'Relative String Date' FROM [dbo].[Output Table] This technique can be used any time you need to retrieve the hex value of a character string in SSIS. The date example may be a bit difficult to understand at first, but with SSIS becoming the preferred tool for enterprise level integration for many companies, there is no doubt that developers will encounter these types of requirements with regularity in the future. Please feel free to contact me if you have any questions.

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How-to logout from ADF Security

- by frank.nimphius

Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} ADF Security configures an authentication servlet, AuthenticationServlet, in the web.xml file that also provides a logout functionality. Developers can invoke the logout by a redirect performed from an action method in a managed bean as shown next public String onLogout() { FacesContext fctx = FacesContext.getCurrentInstance(); ExternalContext ectx = fctx.getExternalContext(); String url = ectx.getRequestContextPath() + "/adfAuthentication?logout=true&end_url=/faces/Home.jspx"; try { ectx.redirect(url); } catch (IOException e) { e.printStackTrace(); } fctx.responseComplete(); return null; } To use this functionality in your application, change the Home.jspx reference to a public page of yours that the user is redirected to after successful logout. Note that for a successful logout, authentication should be through form based authentication. Basic authentication is known as browser sign-on and re-authenticates users after the logout redirect. Basic authentication is confusing to many developers for this reason.

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Web Experience Management: Segmentation & Targeting - Chalk Talk with John

- by Michael Snow

Today's post comes from our WebCenter friend, John Brunswick. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Having trouble getting your arms around the differences between Web Content Management (WCM) and Web Experience Management (WEM)? Told through story, the video below outlines the differences in an easy to understand manner. By following the journey of Mr. and Mrs. Smith on their adventure to find the best amusement park in two neighboring towns, we can clearly see what an impact context and relevancy play in our decision making within online channels. Just as when we search to connect with the best products and services for our needs, the Smiths have their grandchildren coming to visit next week and finding the best park is essential to guarantee a great family vacation. One town effectively Segments and Targets visitors to enhance their experience, reducing the effort needed to learn about their park. Have a look below to join the Smiths in their search. Learn MORE about how you might measure up: Deliver Engaging Digital Experiences Drive Digital Marketing SuccessAccess Free Assessment Tool

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Am 10.02. startet WebCast-Serie für Java Entwickler und WebLogic Interessenten: WebLogic Developer - Get the latest on Oracle WebLogic Server and Java EE 6

- by Thomas Leopold

v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 21 false false false DE X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Accelerate Your Development with Oracle WebLogic Suite Many organisations are reducing travel, conference, and training budgets for their developers without any change to the results expected of those developers. So how can you keep up with the latest developments?By receiving training, delivered free of charge, at your desk!Join us during February and March for a series of online events designed and run by the development team at Oracle. Learn how Oracle WebLogic Suite enables a whole new level of productivity for enterprise developers.Virtual Developer Day - 10th FebruaryStarting with our Virtual Developer Day on 10th February, join us for a blend of hands-on labs, live chat and presentations covering the latest on WebLogic, Java EE 6 and the programming tenets that have made it a true platform breakthrough.Weekly WebLogic Webcasts from 17th February to 17th MarchAfterwards, join us every week from 17th February to 17th March for our weekly one-hour webcasts where we will show you how to build an application from the ground up using Java and JEE technologies. Presented by the engineering team for WebLogic, these webcasts will be of great value to developers and architects, not just those already using WebLogic.For registration, full session abstracts and schedule please click here. Don't miss out! Register now to join our virtual events and keep up with all the latest developments. Find out more and register now Copyright © 2011, Oracle Corporation and/or its affiliates.All rights reserved. Contact Us | Legal Notices and Terms of Use | Privacy Statement

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How do I do JavaScript Array Animation

- by Henry

I'm making a game but don't know how to do Array Animation with the png Array and game Surface that I made below. I'm trying to make it so that when the Right arrow key is pressed, the character animates as if it is walking to the right and when the Left arrow key is pressed it animates as if it is walking to the left (kind of like Mario). I put everything on a surface instead of the canvas. Everything is explained in the code below. I couldn't find help on this anywhere. I hope what I got below makes sense. I'm basically a beginner with JavaScript. I'll be back if more is needed: <!doctype html5> <html> <head></head> <script src="graphics.js"></script> <script src="object.js"></script> <body onkeydown ="keyDown(event)" onkeyup ="keyUp(event)" ></body> <script> //"Surface" is where I want to display my animation. It's like the HTML // canvas but it's not that. It's just the surface to where everything in the //game and the game itself will be displayed. var Surface = new Graphics(600, 400, "skyblue"); //here's the array that I want to use for animation var player = new Array("StandsRight.png", "WalksRight.png", "StandsLeft.png","WalksLeft.png" ); //Here is the X coordinate, Y coordinate, the beginning png for the animation, //and the object's name "player." I also turned the array into an object (but //I don't know if I was supposed to do that or not). var player = new Object(50, 100, 40, 115, "StandsRight.png","player"); //When doing animation I know that it requires a "loop", but I don't // know how to connect it so that it works with the arrays so that //it could animate. var loop = 0; //this actually puts "player" on screen. It makes player visible and //it is where I would like the animation to occur. Surface.drawObject(player); //this would be the key that makes "player" animation in the righward direction function keyDown(e) { if (e.keyCode == 39); } //this would be the key that makes "player" animation in the leftward direction function keyUp(e){ if (e.keyCode == 39); } //this is the Mainloop where the game will function MainLoop(); //the mainloop functionized function MainLoop(){ //this is how fast or slow I could want the entire game to go setTimeout(MainLoop, 10); } </script> </html> From here, are the "graphic.js" and the "object.js" files below. In this section is the graphics.js file. This graphics.js part below is linked to the: script src="graphics.js" html script section that I wrote above. Basically, below is a seperate file that I used for Graphics, and to run the code above, make this graphics.js code that I post below here, a separate filed called: graphics.js function Graphics(w,h,c) { document.body.innerHTML += "<table style='position:absolute;font- size:0;top:0;left:0;border-spacing:0;border- width:0;width:"+w+";height:"+h+";background-color:"+c+";' border=1><tr><td> </table>\n"; this.drawRectangle = function(x,y,w,h,c,n) { document.body.innerHTML += "<div style='position:absolute;font-size:0;left:" + x + ";top:" + y + ";width:" + w + ";height:" + h + ";background-color:" + c + ";' id='" + n + "'></div>\n"; } this.drawTexture = function(x,y,w,h,t,n) { document.body.innerHTML += "<img style='position:absolute;font-size:0;left:" + x + ";top:" + y + ";width:" + w + ";height:" + h + ";' id='" + n + "' src='" + t + "'> </img>\n"; } this.drawObject = function(o) { document.body.innerHTML += "<img style='position:absolute;font-size:0;left:" + o.X + ";top:" + o.Y + ";width:" + o.Width + ";height:" + o.Height + ";' id='" + o.Name + "' src='" + o.Sprite + "'></img>\n"; } this.moveGraphic = function(x,y,n) { document.getElementById(n).style.left = x; document.getElementById(n).style.top = y; } this.removeGraphic = function(n){ document.getElementById(n).parentNode.removeChild(document.getElementById(n)); } } Finally, is the object.js file linked to the script src="object.js"" in the html game file above the graphics.js part I just wrote. Basically, this is a separate file too, so thus, in order to run or test the html game code in the very first section I wrote, a person has to also make this code below a separate file called: object.js I hope this helps: function Object(x,y,w,h,t,n) { this.X = x; this.Y = y; this.Velocity_X = 0; this.Velocity_Y = 0; this.Previous_X = 0; this.Previous_Y = 0; this.Width = w; this.Height = h; this.Sprite = t; this.Name = n; this.Exists = true; } In all, this game is made based on a tutorial on youtube at: http://www.youtube.com/watch?v=t2kUzgFM4lY&feature=relmfu I'm just trying to learn how to add animations with it now. I hope the above helps. If not, let me know. Thanks

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introducing pointers to a large software project

- by stefan

I have a fairly large software project written in c++. In there, there is a class foo which represents a structure (by which i don't mean the programmers struct) in which foo-objects can be part of a foo-object. Here's class foo in simplest form: class Foo { private: std::vector<unsigned int> indices; public: void addFooIndex(unsigned int); unsigned int getFooIndex(unsigned int); }; Every foo-object is currently stored in an object of class bar. class Bar { private: std::vector<Foo> foos; public: void addFoo(Foo); std::vector<Foo> getFoos(); } So if a foo-object should represent a structure with a "inner" foo-object, I currently do Foo foo; Foo innerFoo; foo.addFooIndex(bar.getFoos().size() - 1); bar.addFoo(innerFoo); And to get it, I obviously use: Foo foo; for ( unsigned int i = 0; i < foo.getFooIndices().size(); ++i ) { Foo inner_foo; assert( foo.getFooIndices().at(i) < bar.getFoos().size() ); inner_foo = bar.getFoos().at(foo.getFooIndices().at(i)); } So this is not a problem. It just works. But it's not the most elegant solution. I now want to make the inner foos to be "more connected" with the foo-object. It would be obviously to change class foo to: class Foo { private: std::vector<Foo*> foo_pointers; public: void addFooPointer(Foo*); std::vector<Foo*> getFooPointers(); }; So now, for my question: How to gently change this basic class without messing up the whole code? Is there a "clean way"?

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