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• Oracle Fusion Applications User Experience White Papers by Anna M. Wichansky

  - by JuergenKress

  The Applications User Experience group has created a series of white papers to better communicate the world-class user experience features of the Oracle Fusion Applications, and to describe the process we used to design them. These papers not only explain why the Oracle Fusion Applications User Experience is designed the way it is, but also the data collection, modeling, and testing efforts of our unique, user-focused design process, which contributed to its refinement. The documents we are sharing with product announcement are: Applications User Experience Research and Design Process White Paper New Oracle Fusion Applications: An End-User Experience Designed for Productivity Why Oracle Expects Productivity Gains with Fusion Applications Closing the Deal: the Oracle Fusion Customer Relationship Management User Experience Oracle Fusion Human Capital Management: Designed for a Productive Workforce Get It Done Fast, Get It Done Right: The Oracle Fusion Financials User Experience Oracle Fusion Applications User Experience Design Patterns: Productivity Realized Oracle Fusion Procurement: Changing the Way You Buy and Sell Putting the User into Oracle Fusion Applications User Assistance Read the full article here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. BlogTwitterLinkedInMixForumWiki Technorati Tags: User Experience,Design patterns,WebLogic Community,Oracle,OPN,Jürgen Kress

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• Great Example of a Simple Cost-Benefit Analysis

  - by BuckWoody

  I saw a post the other day that you should definitely go check out. It’s a cost/benefit decision, and although the author gives it a quick treatment and doesn’t take all points in the decision into account, you should focus on the process he follows. It’s a quick and simple example of the kind of thought process we should have as data professionals when we pick a server, a process, or application and even platform software. The key is to include more than just the price of a piece of software or hardware. You need to think about the “other” costs in the decision, and then make the right one. Sometimes the cheapest option is the cheapest, and other times, well, it isn’t. I’ve seen this played out not only in the decision to go with a certain selection, but in the options or editions it comes in. You have to put all of the decision points in the analysis to come up with the right answer, and you have to be able to explain your logic to your team and your company. This is the way you become a data professional, not just a DBA. You can check out the post here – it deals with Azure, but the point is the process, not Azure itself: http://blogs.msdn.com/eugeniop/archive/2010/03/19/windows-azure-guidance-a-simplistic-economic-analysis-of-a-expense-migration.aspx Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• Doing powerups in a component-based system

  - by deft_code

  I'm just starting really getting my head around component based design. I don't know what the "right" way to do this is. Here's the scenario. The player can equip a shield. The the shield is drawn as bubble around the player, it has a separate collision shape, and reduces the damage the player receives from area effects. How is such a shield architected in a component based game? Where I get confused is that the shield obviously has three components associated with it. Damage reduction / filtering A sprite A collider. To make it worse different shield variations could have even more behaviors, all of which could be components: boost player maximum health health regen projectile deflection etc Am I overthinking this? Should the shield just be a super component? I really think this is wrong answer. So if you think this is the way to go please explain. Should the shield be its own entity that tracks the location of the player? That might make it hard to implement the damage filtering. It also kinda blurs the lines between attached components and entities. Should the shield be a component that houses other components? I've never seen or heard of anything like this, but maybe it's common and I'm just not deep enough yet. Should the shield just be a set of components that get added to the player? Possibly with an extra component to manage the others, e.g. so they can all be removed as a group. (accidentally leave behind the damage reduction component, now that would be fun). Something else that's obvious to someone with more component experience?

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• Top Fusion Apps User Experience Guidelines & Patterns That Every Apps Developer Should Know About

  - by ultan o'broin

  We've announced the availability of the Oracle Fusion Applications user experience design patterns. Developers can get going on these using the Design Filter Tool (or DeFT) to select the best pattern for their context of use. As you drill into the patterns you will discover more guidelines from the Applications User Experience team and some from the Rich Client User Interface team too that are also leveraged in Fusion Apps. All are based on the Oracle Application Development Framework components. To accelerate your Fusion apps development and tailoring, here's some inside insight into the really important patterns and guidelines that every apps developer needs to know about. They start at a broad Fusion Apps information architecture level and then become more granular at the page and task level. Information Architecture: These guidelines explain how the UI of an Oracle Fusion application is constructed. This enables you to understand where the changes that you want to make fit into the oveall application's information architecture. Begin with the UI Shell and Navigation guidelines, and then move onto page-level design using the Work Areas and Dashboards guidelines. UI Shell Guideline Navigation Guideline Introduction to Work Areas Guideline Dashboards Guideline Page Content: These patterns and guidelines cover the most common interactions used to complete tasks productively, beginning with the core interactions common across all pages, and then moving onto task-specific ones. Core Across All Pages Icons Guideline Page Actions Guideline Save Model Guideline Messages Pattern Set Embedded Help Pattern Set Task Dependent Add Existing Object Pattern Set Browse Pattern Set Create Pattern Set Detail on Demand Pattern Set Editing Objects Pattern Set Guided Processes Pattern Set Hierarchies Pattern Set Information Entry Forms Pattern Set Record Navigation Pattern Set Transactional Search and Results Pattern Group Now, armed with all this great insider information, get developing some great-looking, highly usable apps! Let me know in the comments how things go!

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• Doing powerups in a component-based system

  - by deft_code

  I'm just starting really getting my head around component based design. I don't know what the "right" way to do this is. Here's the scenario. The player can equip a shield. The the shield is drawn as bubble around the player, it has a separate collision shape, and reduces the damage the player receives from area effects. How is such a shield architected in a component based game? Where I get confused is that the shield obviously has three components associated with it. Damage reduction / filtering A sprite A collider. To make it worse different shield variations could have even more behaviors, all of which could be components: boost player maximum health health regen projectile deflection etc Am I overthinking this? Should the shield just be a super component? I really think this is wrong answer. So if you think this is the way to go please explain. Should the shield be its own entity that tracks the location of the player? That might make it hard to implement the damage filtering. It also kinda blurs the lines between attached components and entities. Should the shield be a component that houses other components? I've never seen or heard of anything like this, but maybe it's common and I'm just not deep enough yet. Should the shield just be a set of components that get added to the player? Possibly with an extra component to manage the others, e.g. so they can all be removed as a group. (accidentally leave behind the damage reduction component, now that would be fun). Something else that's obvious to someone with more component experience?

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• how to troubleshoot sql server issues

  - by joe

  i have an ASP .net application with sql server database, and i am wondering if you can give your ideas on how to troubleshoot the following issue: i can insert / update / delete from any table, but i have one page that uses transactions to insert into different tables. the c# code is correct and very simple, but it fails. i used the sql profiler to see how my app interacts with the DB, especially that the app is using stored procedures, i can catch the exec procedure statement and run it manually from SSMS and it works fine, but the same stored procedure fails from the application!!! which lead me to think that issue is coming from the user account and settings, i am no expert in sql server and wondering if anyone can explain how to verify the required settings for user account. thanks EDIT: in web.config here is how i reference my connection <connectionStrings> <add name="Conn" connectionString="Data Source=localhost;Initial Catalog=myDB;Persist Security Info=True;User ID=DbUser;Password=password1254_3" providerName="System.Data.SqlClient"> </connectionstring> EDIT: i will try to describe the process here: 1- i begin a transaction 2- i call a stored proc to insert (which succeeds) and return the scope identity ( that will be used in the next step) 3- i call another stored procedure to insert some more info + scope identity from step 2, which is a foreign key here 4- i get error, foreign key violation 5- transaction rolled back, now tables empty again... thanks

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• How to Manage Technical Employees

  - by Ajarn Mark Caldwell

  In my current position as Software Engineering Manager I have been through a lot of ups and downs with staffing, ranging from laying-off everyone who was on my team as we went through the great economic downturn in 2007-2008, to numerous rounds of interviewing and hiring contractors, full-time employees, and converting some contractors to employee status.  I have not yet blogged much about my experiences, but I plan to do that more in the next few months.  But before I do that, let me point you to a great article that somebody else wrote on The Unspoken Truth About Managing Geeks that really hits the target.  If you are a non-technical person who manages technical employees, you definitely have to read that article.  And if you are a technical person who has been promoted into management, this article can really help you do your job and communicate up the line of command about your team.  When you move into management with all the new and different demands put on you, it is easy to forget how things work in the tech subculture, and to lose touch with your team.  This article will help you remember what’s going on behind the scenes and perhaps explain why people who used to get along great no longer are, or why things seem to have changed since your promotion. I have to give credit to Andy Leonard (blog | twitter) for helping me find that article.  I have been reading his series of ramble-rants on managing tech teams, and the above article is linked in the first rant in the series, entitled Goodwill, Negative and Positive.  I have read a handful of his entries in this series and so far I pretty much agree with everything he has said, so of course I would encourage you to read through that series, too.

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• What is the correct way to restart udev in Ubuntu?

  - by zerkms

  I've changed the name of my eth1 interface to eth0. How to ask udev now to re-read the config? service udev restart and udevadm control --reload-rules don't help. So is there any valid way except of rebooting? (yes, reboot helps with this issue) UPD: yes, I know I should prepend the commands with sudo, but either one I posted above changes nothing in ifconfig -a output: I still see eth1, not eth0. UPD 2: I just changed the NAME property of udev-rule line. Don't know any reason for this to be ineffective. There is no any error in executing of both commands I've posted above, but they just don't change actual interface name in ifconfig -a output. If I perform reboot - then interface name changes as expected. UPD 3: let I explain all the case better ;-) For development purposes I write some script that clones virtual machines (VirtualBox-driven) and pre-sets them up in some way. So I perform a command to clone VM, start it and as long as network interface MAC is changed - udev adds the second rule to network persistent rules. Right after machine is booted for the first time there are 2 rules: eth0, which does not exist, as long as it existed in the original VM image MAC eth1, which exists, but all the configuration in all files refers to eth0, so it is not that good for me So I with sed delete the line with eth0 (it is obsolete and useless in cloned image) and replace eth1 with eth0. So currently I have valid persistent rule, but there is still eth1 in /dev. The issue: I don't want to reboot the machine (it will take another time, which is not good thing on building-VM-stage) and just want to have my /dev rebuilt with some command so I have ready-to-use VM without any reboots.

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• How to popularize Nemerle (or another programming language)?

  - by keykeeper

  Any .NET developer who is interested in different programming languages knows that F# is the most popular functional language for the .NET platform nowadays. The only fact describing the popularity of F# is the great support of Microsoft. But we are not limited with F# at all. There are some other functional languages on the .NET platform. I'm very disappointed with the fact that Nemerle isn't well-known. It's an awesome language which supports three paradigms: object-oriented, functional and meta- programming. I won't try to explain why I like it so much. The problem is that I can't use it at work. I think that only really brave companies can rely on Nemerle. It's almost unknown, that's why it's hard to find new developers for the project. Noone wants to make a first step with Nemerle if it can influence the budget what is reasonable. So, here is a question: what can I do to make Nemerle more popular? Here are my first ideas: implement open-source projects using Nemerle; make presentations on different conferences; write articles.

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• Review: Data Modeling 101

  I just recently read “Data Modeling 101”by Scott W. Ambler where he gave an overview of fundamental data modeling skills. I think this article was excellent for anyone who was just starting to learn or refresh their skills in regards to the modeling of data.  Scott defines data modeling as the act of exploring data oriented structures.  He goes on to explain about how data models are actually used by defining three different types of models. Types of Data Models Conceptual Data Model  Logical Data Model (LDMs) Physical Data Model(PDMs) He further expands on modeling by exploring common data modeling notations because there are no industry standards for the practice of data modeling. Scott then defines how to actually model data by expanding on entities, attributes, identities, and relationships which are the basic building blocks of data models. In addition he discusses the value of normalization for redundancy and demoralization for performance. Finally, he discuss ways in which Developers and DBAs can become better data modelers through the use of practice, and seeking guidance from more experienced data modelers.

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• SQL query. An unusual join. DB implemented in sqlite-3

  - by user02814

  This is essentially a question about constructing an SQL query. The db is implemented with sqlite3. I am a relatively new user of SQL. I have two tables and want to join them in an unusual way. The following is an example to explain the problem. Table 1 (t1): id year name ------------------------- 297 2010 Charles 298 2011 David 300 2010 Peter 301 2011 Richard Table 2 (t2) id year food --------------------------- 296 2009 Bananas 296 2011 Bananas 297 2009 Melon 297 2010 Coffee 297 2012 Cheese 298 2007 Sugar 298 2008 Cereal 298 2012 Chocolate 299 2000 Peas 300 2007 Barley 300 2011 Beans 300 2012 Chickpeas 301 2010 Watermelon I want to join the tables on id and year. The catch is that (1) id must match exactly, but if there is no exact match in Table 2 for the year in Table 1, then I want to choose the year that is the next (lower) available. A selection of the kind that I want to produce would give the following result id year matchyr name food ------------------------------------------------- 297 2010 2010 Charles Coffee 298 2011 2008 David Cereal 300 2010 2007 Peter Barley 301 2011 2010 Richard Watermelon To summarise, id=297 had an exact match for year=2010 given in Table 1, so the corresponding line for id=297, year=2010 is chosen from Table 2. id=298, year=2011 did not have a matching year in Table 2, so the next available year (less than 2011) is chosen. As you can see, I would also like to know what that matched year (whether exactly , or inexactly) actually was. I would very much appreciate (1) an indication (yes/no answer) of whether this is possible to do in SQL alone, or whether I need to look outside SQL, and (2) a solution, if that is not too onerous.

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• Ubuntu's security, Gaming, X server, situation [closed]

  - by ShortCircuit

  Little background story. So when I first heard about the NSA spying on people I wasn't surprised, it also was the reason why I switched to Ubuntu. (Full time) It had it's disadvantages when comparing to Windows and it's AAA games and other stuff. My best friend is somewhat upset about me, using full time Ubuntu, because we play a game named "Dayz (an addon for Arma II)" and WineHQ wasn't of any help. Not to mention that he keeps asking me if WineHQ can run Dayz, but he clearly doesn't understand the situation of WineHQ, that it's free, that you have to be happy with what you got at the moment. (I'm not going to dual boot because, how else is gaming on Ubuntu/Linux going to happen?) But whenever I was in a nasty situation where I could do something so simply on Windows and not/hard on Ubuntu, I always thought "It's almost virus free, It's free, No one is spying on me." My Questions: My English isn't all that good, so could some one simplify/explain what the hell is going on the below standing link? Ubuntu Spyware: What to Do? https://www.gnu.org/philosophy/ubuntu-spyware.html When will gaming on Linux/Ubuntu be a real thing? I've heard that the X server's code is a mess and that Wayland will replace X server. When/will this come reality? (I might have understood this wrong.)

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• Is there a way to legally create a game mod?

  - by Rodrigo Guedes

  Some questions about it: If I create a funny version of a copyrighted game and sell it (crediting the original developers) would it be considered a parody or would I need to pay royalties? If I create a game mod for my own personal use would it be legal? What if I gave it for free to a friend? Is there a general rule about it or it depends on the developer will? P.S.: I'm not talking about cloning games like this question. It's all about a game clearly based on another. Something like "GTA Gotham City" ;) EDIT: This picture that I found over the internet illustrate what I'm talking about: Just in case I was not clear: I never created a mod game. I was just wondering if it would be legally possible before trying to do it. I'm not apologizing piracy. I pay dearly for my games (you guys have no idea how expensive games are in Brazil due to taxes). Once more I say that the question is not about cloning. Cloning is copy something and try to make your version look like a brand new product. Mods are intended to make reference to one or more of its source. I'm not sure if it can be done legally (if I knew I wasn't asking) but I'm sure this question is not a duplicate. Even so, I trust in the moderators and if they close my question I will not be offended - at least I had an opportunity to explain myself and got 1 good answer (by the time I write this, maybe some more will be given later).

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• Split a 2D scene in layers or have a z coordinate

  - by Bane

  I am in the process of writing a 2D game engine, and a dilemma emerged. Let me explain the situation... I have a Scene class, to which various objects can be added (Drawable, ParticleEmitter, Light2D, etc), and as this is a 2D scene, things will obviously be drawn over each other. My first thought was that I could have basic add and remove methods, but I soon realized that then there would be no way for the programmer to control the order in which things were drawn. So I can up with two options, each with its pros and cons. A) Would be to split the scene in layers. By that I mean instead of having the scene be a container of objects, have it be a container of layers, which are in turn the containers of objects. B) Would require to have some kind of z-coordinate, and then have the scene sorted so objects with lower z get drawn first. Option A is pretty solid, but the problem is with the lights. In what layer do I add it? Does it work cross-layer? On all bottom layers? And I still need the Z coordinate to calculate the shadow! Option B would require me to change all my code from having Vector2D positions, to some kind of class that inherits from Vector2D and adds a z coordinate to it (I don't want it to be a Vector3D because I still need all the same methods the 2D kind has, just with .z clamped on). Am I missing something? Is there an alternative to these methods? I'm working in Javascript, if that makes a difference.

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• Strange robots.txt - how and why did it get there?

  - by Mick

  I recently created a very simple, pure HTML website which I have hosted with "hostmonster". Hostmonster had very good reviews on some comparison website and in general so far they appear to be perfectly good in every way... At least I thought so until just now... I have been making lots of edits to my site on an almost daily basis. My site now appears on the first page (7th on the list) for my most important keyphrase when doing a google search. But I did notice some problem with the snippet chosen by google. I asked a question on this site about snippets and got some great answers. I then made some modifications to my meta data and within 48hrs the google snippet for my search was perfect. The odd thing though was that looking at the "cached" version google had, it appeared that the cache was still very odl- like three weeks previous. This seemed very odd - how could it be that the google robots had read my new metadata without updating the cache? This puzzled me greatly. Just now it occurred to me that maybe I had some goofey setting in my robots.txt file. I didn't actually remember even making one - but I thought I'd have a look just in case. Much to my horror, I saw that there was a robots.txt and it contained the disturbing text below: sitemap: http://cdn.attracta.com/sitemap/728687.xml.gz Intuitively this looks like some kind of junk, spam trick, and I had indeed been getting some spam from "attracta". So my questions are: 1. Should I simply delete this robots.txt? 2. Was the file there all along - placed there because of some commercial tie-in between attracta and hostmonster. 3. Does the attracta robots file explain the lack of re-caching?

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• How to show or direct a business analyst to a data modelling subject?

  - by AaronLS

  Our business analysts pushed hard to collect data through a spreadsheet. I am the programmer responsible for importing that data. Usually when they push hard for something like this, I never know how well it will work out until a few weeks later when I have time assigned to work on the task of programming the import of the data. I have tried to do as much as possible along the way, named ranges, data validations, etc. But I usually don't have time to take a detailed look at all the data and compare to the destination in the database to determine how well it matches up. A lot of times there will be maybe a little table of items that somehow I have to relate to something else in the database, but there are not natural or business keys present that would allow me to do so. Make the best of this, trying to write something that can compare strings and make a best guess at it and then go through the effort of creating interfaces for a user to match the imported data to the destination. I feel like if the business analyst was actually creating a data model, they would be forced to think about these relationships, and have an appreciation for the need of natural or business keys to be part of the spreadsheet for the purposes of smoothly importing the data. The closest they come to business analysis is a big flat list of fields, and that would be fine if it were like any other data dictionary and include data types+relationships, but it isn't. They are just a bunch of names. No indication of what type of data they might hold, and it is up to me to guess. When I have pushed for more detail, they say that it is just busy work. How can I explain the importance of data modelling? How can I tell them what it is and how to do it? It feels impossible, because they don't have an appreciation for its importance. They do however, usually have an interest in helping out in whatever way they can, it's just this in particular has never gotten a motivated response.

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• How does eMail encryption work?

  - by Dummy Derp

  I have been going over YouTube watching videos on eMail encryption and everyone seems to explain it from a different perspective. Some do it for a CompTIA exam while others just provide a primer. Here is what I understood: Step1: You compose an email that you want to send. Without encryption, it will be simple ASCII text that will be visible to anyone along the way. Step2: You generate a digital signature to make sure that nobody gets to re-transmit your email and claim it was you. Digital Signature is generated using Sender's private key which is usually a hash of the password and is then combined with the original message to form one long hash string. These signatures are one-time-use-only and a new one is calculated for every email. Step 3: You encrypt the compose of your email using Receiver's public key so that the only person who can read it is the intended receiver using their private key Step 4: When you hit the send the email, what is transmitted now is gibberish to everyone apart from the intended receiver who will decrypt is using their private key And there are various ways to do it like PEM, PGP, etc. Correct me where I am wrong or refine where necessary.

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• Self Service Reporting With PowerPivot

  - by blakmk

  There are so many cool new features in Sql 2008 release 2 it was difficult for me to pick a topic for T-SQL Tuesday . But the one that I am now a secret fan of, I once resented for its creation. Let me explain, for years I have encountered reporting systems cobbled together in tools like Access and Excel built by "database hobbyists" who had no formal training in database design or best practices. They would take their monstrosities as far as they could go before ultimatley it stopped working or the person that wrote it left the company. At that point it would become the resident DBA's problem to support it as a Live application. So when I first heard of Power Pivot, a sense of Deja Vu overtook me and I felt like the guy in the Ausin Powers movie , knowing the inevitable is coming but somehow unsure how to get out of the way. But when I eventually saw it in action, I quickly realised that it is a very powerful tool. It has a much smaller "time to market" than traditional BI architectures. Combined with the new features of Excel, some pretty impressive dashboards can be produced.Of course PowerPivot is not a magic bullet and along with potential scalability issues there are the usual issues such as master data management and data quality that cannot be overcome easily with power pivot. As a tool though, it has potential. Traditional BI is expensive, both in terms of time and the amount of resources it takes to deliver the system. The time lag between an analyst or a commercial accountant requesting reports and the report being delivered can make a huge commercial difference. I have observed companies where empowered end users become extremely productive when allowed to plough in to various disperate datasets. It may not be the correct way or the most sustainable but its cheap and quick. In these times when budgets are being slashed and we are forced to deliver more with less, why not empower the end user in a tool that is designed for exactly this task.... @blakmk  

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• Error message when running OpenGL programs with bumblebee

  - by user170860

  X Error of failed request: BadDrawable (invalid Pixmap or Window parameter) Major opcode of failed request: 152 (DRI2) Minor opcode of failed request: 8 (DRI2SwapBuffers ) Resource id in failed request: 0x4200005 Serial number of failed request: 2166 Current serial number in output stream: 2167 primus: warning: timeout waiting for display worker Segmentation fault (core dumped) I don't get this on all OGL programs, but only particularly GPU intense ones. Also, I only get this using primusrun. optirun gives the same error no matter what I run: [VGL] NOTICE: Pixel format of 2D X server does not match pixel format of [VGL] Pbuffer. Disabling PBO readback. I don't know what either of these mean. Neither of them stop the programs from running, but I'd like to fix the problem if there is one. Also, I prefer to use primusrun because it is faster and it does a better job with vertical sync, however, it only supports OGL 4.2. This isn't a big issue because the programs I write are forward compatible, but it still seems odd to me. So basically I'd just like it if someone could explain to me what is happening and if there is something I can do about it. Thanks.

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• how a pure functional programming language manage without assignment statements?

  - by Gnijuohz

  When reading the famous SICP,I found the authors seem rather reluctant to introduce the assignment statement to Scheme in Chapter 3.I read the text and kind of understand why they feel so. As Scheme is the first functional programming language I ever know something about,I am kind of surprised that there are some functional programming languages(not Scheme of course) can do without assignments. Let use the example the book offers,the bank account example.If there is no assignment statement,how can this be done?How to change the balance variable?I ask so because I know there are some so-called pure functional languages out there and according to the Turing complete theory,this must can be done too. I learned C,Java,Python and use assignments a lot in every program I wrote.So it's really an eye-opening experience.I really hope someone can briefly explain how assignments are avoided in those functional programming languages and what profound impact(if any) it has on these languages. The example mentioned above is here: (define (make-withdraw balance) (lambda (amount) (if (>= balance amount) (begin (set! balance (- balance amount)) balance) "Insufficient funds"))) This changed the balance by set!.To me it looks a lot like a class method to change the class member balance. As I said,I am not familiar with functional programming languages,so if I said something wrong about them,feel free to point out.

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• PHP file_put_contents File Locking

  - by hozza

  The Senario: You have a file with a string (average sentence worth) on each line. For arguments sake lets say this file is 1Mb in size (thousands of lines). You have a script that reads the file, changes some of the strings within the document (not just appending but also removing and modifying some lines) and then overwrites all the data with the new data. The Questions: Does 'the server' PHP, OS or httpd etc. already have systems in place to stop issues like this (reading/writing half way through a write)? i. If it does, please explain how it works and give examples or links to relevant documentation. ii. If not, are there things I can enable or set-up, such as locking a file until a write is completed and making all other reads and/or writes fail until the previous script has finished writing? My Assumptions and Other Information: The server in question is running PHP and Apache or Lighttpd. If the script is called by one user and is halfway through writing to the file and another user reads the file at that exact moment. The user who reads it will not get the full document, as it hasn't been written yet. (If this assumption is wrong please correct me) I'm only concerned with PHP writing and reading to a text file, and in particular, the functions "fopen"/"fwrite" and mainly "file_put_contents". I have looked at the "file_put_contents" documentation but have not found the level of detail or a good explanation of what the "LOCK_EX" flag is or does. The senario is an EXAMPLE of a worst case senario where I would assume these issues are more likely to occur, due to the large size of the file and the way the data is edited. I want to learn more about these issues and don't want or need answers or comments such as "use mysql" or "why are you doing that" because I'm not doing that, I just want to learn about file read/writing with PHP and don't seem to be looking in the right places/documentation and yes I understand PHP is not the perfect language for working with files in this way...

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• Who is code wanderer?

  - by DigiMortal

  In every area of life there are people with some bad habits or misbehaviors that affect the work process. Software development is also not free of this kind of people. Today I will introduce you code wanderer. Who is code wanderer? Code wandering is more like bad habit than serious diagnose. Code wanderers tend to review and “fix” source code in files written by others. When code wanderer has some free moments he starts to open the code files he or she has never seen before and starts making little fixes to these files. Why is code wanderer dangerous? These fixes seem correct and are usually first choice to do when considering nice code. But as changes are made by coder who has no idea about the code he or she “fixes” then “fixing” usually ends up with messing up working code written by others. Often these “fixes” are not found immediately because they doesn’t introduce errors detected by compilers. So these “fixes” find easily way to production environments because there is also very good chance that “fixed” code goes through all tests without any problems. How to stop code wanderer? The first thing is to talk with person and explain him or her why those changes are dangerous. It is also good to establish rules that state clearly why, when and how can somebody change the code written by other people. If this does not work it is possible to isolate this person so he or she can post his or her changes to code repository as patches and somebody reviews those changes before applying them.

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• Avoiding Object Oriented Pitfalls, Migrating from C, What Worked for You?

  - by Stephen

  I've been programming in procedural languages for quite some time now, and my first reaction to a problem is to start breaking it down into tasks to perform rather than to consider the different entities (objects) that exist and their relationships. I have had a university course in OOP, and understand the fundamentals of encapsulation, data abstraction, polymorphism, modularity and inheritance. I read Learning to think in the Object Oriented Way and Learning object oriented thinking, and will be looking at some of the books pointed to in those answers. I think that several of my medium to large sized projects will benefit from effective use of OOP but as a novice I would like to avoid time consuming, common errors. Based on your experiences, what are these pitfalls and what are reasonable ways around them? If you could explain why they are pitfalls, and how your suggestion is effective in addressing the issue it'd be appreciated. I'm thinking along the lines of something like "Is it common to have a fair number of observer and modifier methods and use private variables or are there techniques for consolidating/reducing them?" I'm not worried about using C++ as a pure OO language, if there are good reasons to mix methods. (Reminiscent of the reasons to use GOTOs, albeit sparingly.) Thank you!

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• Why is a small fixed vocabulary seen as an advantage to RESTful services?

  - by Matt Esch

  So, a RESTful service has a fixed set of verbs in its vocabulary. A RESTful web service takes these from the HTTP methods. There are some supposed advantages to defining a fixed vocabulary, but I don't really grasp the point. Maybe someone can explain it. Why is a fixed vocabulary as outlined by REST better than dynamically defining a vocabulary for each state? For example, object oriented programming is a popular paradigm. RPC is described to define fixed interfaces, but I don't know why people assume that RPC is limited by these contraints. We could dynamically specify the interface just as a RESTful service dynamically describes its content structure. REST is supposed to be advantageous in that it can grow without extending the vocabulary. RESTful services grow dynamically by adding more resources. What's so wrong about extending a service by dynamically specifying a per-object vocabulary? Why don't we just use the methods that are defined on our objects as the vocabulary and have our services describe to the client what these methods are and whether or not they have side effects? Essentially I get the feeling that the description of a server side resource structure is equivalent to the definition of a vocabulary, but we are then forced to use the limited vocabulary in which to interact with these resources. Does a fixed vocabulary really decouple the concerns of the client from the concerns of the server? I surely have to be concerned with some configuration of the server, this is normally resource location in RESTful services. To complain at the use of a dynamic vocabulary seems unfair because we have to dynamically reason how to understand this configuration in some way anyway. A RESTful service describes the transitions you are able to make by identifying object structure through hypermedia. I just don't understand what makes a fixed vocabulary any better than any self-describing dynamic vocabulary, which could easily work very well in an RPC-like service. Is this just a poor reasoning for the limiting vocabulary of the HTTP protocol?

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• How to connect Ethernet on Ubuntu (with auto-detection)

  - by user12285

  It's been well over six months but I have the same router SmartAX MT880d with Ethernet, and the exact same problem : no internet, even though I can successfully reach the modem settings page by entering 192.168.1.1 in Firefox. I'm a total beginner with Ubuntu. My internet works great in Windows but does not work in Ubuntu. Sorry if I don't use the right (technical) terminology to explain my issue. English is not my mother tongue. For 2 weeks, I've been doing reading on the web and forums and the ubuntuguide.org to name a few, but to no avail. Now I see no other solution but to ask for help. My problem is that I can't find a way to put the right digits in the right place because I don't know what numbers I need to put in what files. E.g.: do I need to use DHCP? or a static IP address? No clue whatsoever. I'm concerned that I might put figures in the wrong spaces. For example, is the modem/router's IP exactly 192.168.1.1 for Huawei Smart AXMT880d modem? Is the subnet 255.255.255.0? Gateway 192.168.1.1? I'm confused as I can also see a different IP starting with 155131*** (is it an account number?) on my contract with Huawei (a Chinese ISP). Apart from calling 911, what other numbers do I need to put in and where? How do I check that all the numbers have been entered correctly in every appropriate space before trying to connect the Internet?

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