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• What is the meaning of 'high cohesion'?

  - by Max

  I am a student who recently joined a software development company as an intern. Back at the university, one of my professors used to say that we have to strive to achieve "Low coupling and high cohesion". I understand the meaning of low coupling. It means to keep the code of separate components separately, so that a change in one place does not break the code in another. But what is meant by high cohesion. If it means integrating the various pieces of the same component well with each other, I dont understand how that becomes advantageous. What is meant by high cohesion? Can an example be explained to understand its benefits?

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• BDD: Getting started

  - by thom

  I'm starting with BDD and this is my story: Feature: Months and days to days In order to see months and days as days As a date conversion fan I need a webpage where users can enter days and months and convert them to days. I have some doubts ... Should I write my scenarios before coding anything or should I first write a scenario and then write code, write a scenario again and then write code, and so on ... ? If I should write my scenarios before, can my steps be approved and production code still does not get done? When should I do refactoring on my code? After the feature is done or after each scenario implementation?

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• Hilfe?! Wie funktioniert mein Werkzeug?

  - by DBA Community

  Es gibt eine ganze Reihe an Oracle Tools für die Oracle Datenbank, die per Command Line Interfaces bedient werden können: Von RMAN über ADRCI, vom SQL*Loader über Export/Import, von SRVCTL über SQL*Plus. Und wie es sich für ordentliche Werkzeug gehört, besitzt auch (fast) jedes einzelne von ihnen eine eigene Hilfestellung. Wobei die Betonung eindeutig auf "eigene" liegt. Auch der ungeübte Benutzer wird sehr schnell merken, dass Oracle sich hier wohl nie so wirklich Gedanken darüber gemacht hat, die Hilfefunktionen zu vereinheitlichen - außer dass die Hilfe mehr oder weniger hilfreich ist. Die wohl interessanteste Ausprägung dieser Hilfefunktion ist hier sicherlich der RMAN, dessen umfangreiche Syntaxhilfe nur schwer zu erhalten ist - es sei denn man vertippt sich absichtlich. Solange man alles richtig macht (oder eben falsch, aber leider mit der richtigen Syntax) ist RMAN kein Hinweis über seine umfangreichen Syntaxchecker zu "entlocken". Wie man bei den vielen unterschiedlichen Oracle Tools die hilfreichen Informationen bekommt, damit beschäftigt sich unser Tipp. Weiter zum Tipp

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• Which is a better practice - helper methods as instance or static?

  - by Ilian Pinzon

  This question is subjective but I was just curious how most programmers approach this. The sample below is in pseudo-C# but this should apply to Java, C++, and other OOP languages as well. Anyway, when writing helper methods in my classes, I tend to declare them as static and just pass the fields if the helper method needs them. For example, given the code below, I prefer to use Method Call #2. class Foo { Bar _bar; public void DoSomethingWithBar() { // Method Call #1. DoSomethingWithBarImpl(); // Method Call #2. DoSomethingWithBarImpl(_bar); } private void DoSomethingWithBarImpl() { _bar.DoSomething(); } private static void DoSomethingWithBarImpl(Bar bar) { bar.DoSomething(); } } My reason for doing this is that it makes it clear (to my eyes at least) that the helper method has a possible side-effect on other objects - even without reading its implementation. I find that I can quickly grok methods that use this practice and thus help me in debugging things. Which do you prefer to do in your own code and what are your reasons for doing so?

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• Why should a class be anything other than "abstract" or "final/sealed"

  - by Nicolas Repiquet

  After 10+ years of java/c# programming, I find myself creating either: abstract classes: contract not meant to be instantiated as-is. final/sealed classes: implementation not meant to serve as base class to something else. I can't think of any situation where a simple "class" (i.e. neither abstract nor final/sealed) would be "wise programming". Why should a class be anything other than "abstract" or "final/sealed" ? EDIT This great article explains my concerns far better than I can.

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• Hosting several HTTP servers on single domain name

  - by Nakilon

  Several people have got a single domain name server.company.com server, where they are now supposed to host their infrastructure or temporal projects, written in different ways even in different programming languages. How do they divide the domain? Split into subdomains: john.server.company.com, kate.server.company.com, etc. This would need a lot of admins' assistance, time, etc. -- there would be no way for John and Kate to do it themselves. Split into url namespaces: server.company.com/john/, server.company.com/kate/, etc. Pro: They now can make a single welcome page at root with any additional info (if they need?) Con: Each server would need to know their namespace string constant, and hrefs like / whould need patching. Split into ports: server.company.com:8080, server.company.com:8081, etc. and make a single :80 welcome page. Pro: They still can make a single welcome page at :80 Con: ??? I would like to know more pros and cons for 2 and 3 solution.

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• What is the difference between industrial development and open source development?

  - by Ida

  Intuitively, I think open source development should be much more "casual" than industrial development process (like in Microsoft). Because for OSS development: Duty separation is not that strict than in big companies (maybe developers == testers in open source development?) People come in and out of the open source community, much more frequently than in big companies However, above are just my guesses. I really want to know more about the major difference between the open source and industrial development. Is their division of duty totally different (e.g., is there a leader/manager-like role in open source development?)? Maybe it is their communication style that differs a lot? Or their workflow? Please share your opinions. Thanks a lot!

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• Should all, none, or some overriden methods call Super?

  - by JoJo

  When designing a class, how do you decide when all overridden methods should call super or when none of the overridden methods should call super? Also, is it considered bad practice if your code logic requires a mixture of supered and non-supered methods like the Javascript example below? ChildClass = new Class.create(ParentClass, { /** * @Override */ initialize: function($super) { $super(); this.foo = 99; }, /** * @Override */ methodOne: function($super) { $super(); this.foo++; }, /** * @Override */ methodTwo: function($super) { this.foo--; } }); After delving into the iPhone and Android SDKs, I noticed that super must be called on every overridden method, or else the program will crash because something wouldn't get initialized. When deriving from a template/delegate, none of the methods are supered (obviously). So what exactly are these "je ne sais quoi" qualities that determine whether a all, none, or some overriden methods should call super?

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• Using the @ in SQL Azure Connections

  - by BuckWoody

  The other day I was working with a client on an application they were changing to a hybrid architecture – some data on-premise and other data in SQL Azure and Windows Azure Blob storage. I had them make a couple of corrections - the first was that all communications to SQL Azure need to be encrypted. It’s a simple addition to the connection string, depending on the library you use. Which brought up another interesting point. They had been using something that looked like this, using the .NET provider: Server=tcp:[serverName].database.windows.net;Database=myDataBase; User ID=LoginName;Password=myPassword; Trusted_Connection=False;Encrypt=True; This includes most of the formatting needed for SQL Azure. It specifies TCP as the transport mechanism, the database name is included, Trusted_Connection is off, and encryption is on. But it needed one more change: Server=tcp:[serverName].database.windows.net;Database=myDataBase; User ID=[LoginName]@[serverName];Password=myPassword; Trusted_Connection=False;Encrypt=True; Notice the difference? It’s the User ID parameter. It includes the @ symbol and the name of the server – not the whole DNS name, just the server name itself. The developers were a bit surprised, since it had been working with the first format that just used the user name. Why did both work, and why is one better than the other? It has to do with the connection library you use. For most libraries, the user name is enough. But for some libraries (subject to change so I don’t list them here) the server name parameter isn’t sent in the way the load balancer understands, so you need to include the server name right in the login, so the system can parse it correctly. Keep in mind, the string limit for that is 128 characters – so take the @ symbol and the server name into consideration for user names. The user connection info is detailed here: http://msdn.microsoft.com/en-us/library/ee336268.aspx Upshot? Include the @servername on your connection string just to be safe. And plan for that extra space…  

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• Public Sector FMW Customer Tech Day in Reston, Tuesday Oct 7th

  - by BPMWarrior

  Have your heard? There is another PS FMW Customer Tech Day scheduled in the Oracle Reston office!                                                                                          Fusion Middleware Customer Tech Day                                                          October 7, 2014                                   Please join Oracle & Sofbang on Tuesday October 7th for our second Public Sector Oracle Fusion Middleware (OFMW) Customer Tech Day in Reston.   This Tech Day is designed with you the customer in mind. Come learn and share with other customers. This event will be centered on Mobility, App Advantage, WebCenter, SOA, BPM, Security and FMWaaS.   Sofbang enables customers to create, integrate and run agile intelligent business applications leveraging Oracle Fusion Middleware. Based out of Chicago, IL, Sofbang is recognized as an Oracle Platinum level Partner in the Oracle Partner Network. For more information on Sofbang, please visit www.sofbang.com   To confirm your attendance at this Event or for more information, please email [email protected]                                              

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• Is nesting types considered bad practice?

  - by Rob Z

  As noted by the title, is nesting types (e.g. enumerated types or structures in a class) considered bad practice or not? When you run Code Analysis in Visual Studio it returns the following message which implies it is: Warning 34 CA1034 : Microsoft.Design : Do not nest type 'ClassName.StructueName'. Alternatively, change its accessibility so that it is not externally visible. However, when I follow the recommendation of the Code Analysis I find that there tend to be a lot of structures and enumerated types floating around in the application that might only apply to a single class or would only be used with that class. As such, would it be appropriate to nest the type sin that case, or is there a better way of doing it?

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• Motivation and use of move constructors in C++

  - by Giorgio

  I recently have been reading about move constructors in C++ (see e.g. here) and I am trying to understand how they work and when I should use them. As far as I understand, a move constructor is used to alleviate the performance problems caused by copying large objects. The wikipedia page says: "A chronic performance problem with C++03 is the costly and unnecessary deep copies that can happen implicitly when objects are passed by value." I normally address such situations by passing the objects by reference, or by using smart pointers (e.g. boost::shared_ptr) to pass around the object (the smart pointers get copied instead of the object). What are the situations in which the above two techniques are not sufficient and using a move constructor is more convenient?

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• UPK Pre-Built Content Update

  - by Karen Rihs

  UPK pre-built content development efforts are always underway and growing. Over the last few months, the following new and upgraded modules became available:  NEW CONTENT RELEASES E-Business Suite 12.1 Field Service Manufacturing Operations Center Process Manufacturing:  System Administration Strategic Network Optimization U.S. Federal Financials Oracle Communications 11.1 Oracle Communications UPK for Pricing Design Center, Voice and Data Offerings Oracle Mobile Workforce 2.1.0 Administrative Setup User Tasks Primavera Primavera Portfolio Management 9.0 UPK CONTENT UPGRADES JDE E1 9.1 HCM Fundamentals for EnterpriseOne Manufacturing - Product Data Management Manufacturing Management Discrete Shop Floor Management Procurement and Subcontract Management JDE World A9.3 Accounts Payable Address Book  Common Foundation General Ledger For a list of modules currently available for each product line, visit the UPK Resource Library on Oracle.com. For more information on how your organization can take advantage of UPK pre-built content, see our previous blog,  The Value of UPK Pre-Built Content. - Karen Rihs, UPK Outbound Product Management

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• Quick Tip - Speed a Slow Restore from the Transaction Log

  - by KKline

  Here's a quick tip for you: During some restore operations on Microsoft SQL Server, the transaction log redo step might be taking an unusually long time. Depending somewhat on the version and edition of SQL Server you've installed, you may be able to increase performance by tinkering with the readahead performance for the redo operations. To do this, you should use the MAXTRANSFERSIZE parameter of the RESTORE statement. For example, if you set MAXTRANSFERSIZE=1048576, it'll use 1MB buffers. If you...(read more)

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• Is it bad practice to output from within a function?

  - by Nick

  For example, should I be doing something like: <?php function output_message($message,$type='success') { ?> <p class="<?php echo $type; ?>"><?php echo $message; ?></p> <?php } output_message('There were some errors processing your request','error'); ?> or <?php function output_message($message,$type='success') { ob_start(); ?> <p class="<?php echo $type; ?>"><?php echo $message; ?></p> <?php return ob_get_clean(); } echo output_message('There were some errors processing your request','error'); ?> I understand they both achieve the same end result, but are there benefits doing one way over the other? Or does it not even matter?

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• Methods of ordering function definitions in code

  - by xralf

  When I work on some programming project (usually command line application in Python with many switches), I'm usually creating about 30 and more functions. Most of the functions are in one file (except some helpers that I utilize in more projects). Some of the functions are called on particular switch (like -p or --print) but many functions do some helper computations, print operations or database operations because I don't want to main functions be too large. When I have an idea for a new functionality I often put new functions randomly to the file. Should I think more about it and place it to some particular place? Are there some methods for this?

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• Register Now to the New Oracle Argus Safety 7 Implementation Boot Camp - Tokyo, Japan - Dec 10-13, 2013!

  - by Roxana Babiciu

  Oracle's Argus Safety 7 boot camp is an instructor-led training course which provides a good understanding of how Oracle Argus Safety Standard Edition and Oracle Argus Safety Japan products addresses complex pharmacovigilance requirements and helps ensure global regulatory compliance by enabling sound safety decisions. Oracle Argus Safety's advanced database helps ensure global regulatory compliance thus in turn enabling sound safety decisions. Read more here. 

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• Költözik a blog

  - by lsarecz

  Kedves Olvasó! A közelmúltban elhatároztuk, hogy az Oracle Hungary jelenleg muködo magyar nyelvu blogjait összevonjuk, és egy közös blogba publikál az összes szakérto kolléga. Ezzel remélhetoleg egy gyakran frissülo, hasznos szakmai tartalommal felöltött online napló születik, ami az eddigi egyébként is nagyszeru blogjainkat is felülmúlja. Az új Oracle Hungary Technology Blog itt található: https://blogs.oracle.com/hunoratech/

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• Elofordult már, hogy nehezen tudta értelmezni milyen patch-et is javasolt a támogató mérnök?

  - by user552636

  Bevallom, Ügyfeleink bejelentéseinek monitorozása közben nem egyszer gondolkodóba estem, mit is jelentenek a PSE, MLR, One-off, és további gyönyöruséges kifejezések, melyeket a támogató mérnökök használnak. Nemrégiben bukkantam rá a My Oracle Suport-on a  Document ID 1430923.1 cikkre, melyben ezen kifejezések magyarázatát át tudjuk tekinteni. Szerencsére a leírásban szerepelnek a korábbi kifejezések is, mert én úgy látom vannak támogató mérnökök akik egyelore még a régi elnevezéseket használják. Ha már a javításokról esik szó, szeretném felhívni a figyelmet az Oracle Tech Error Correction Policy document-re is, mely nagyszeru áttekintést ad az Oracle bug javítási irányelveirol. Ebben a dokumentumban megtalálhatjuk a Release Schedule of Current Database Releases (Doc ID 742060.1)  és  Error Correction Support Timelines for Oracle Application Server (Fusion Middleware) (Doc ID 944866.1) cikkek hivatkozásait is melyeken belül akár az Adatbázis és Fusion Middleware termékek roadmap-jéig is eljuthatunk. Érdemes ezeket a cikkeket a My Oracle Support felületen kedvencnek megjelölni, hogy bármikor könnyedén elérhetok legyenek. A számunkra hasznos cikket a kedvencek közé a cikk címe melletti csillagra kattintva tehetjük kedvenceink közé és következo alkalommal a menüsorban talál csillagra kattintva varázsolhatjuk elo az alábbi képernyo részletek szerint. 

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• Should we consider code language upon design?

  - by Codex73

  Summary This question aims to conclude if an applications usage will be a consideration when deciding upon development language. What factors if any could be considered upon language writing could be taken into context. Application Type: Web Question Of the following popular languages, when should we use one or the other? What factors if any could be considered upon language writing could be taken into context. Languages PHP Ruby Python My initial thought is that language shouldn't be considered as much as framework. Things to consider on framework are scalability, usage, load, portability, modularity and many more. Things to consider on Code Writing maybe cost, framework stability, community, etc.

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• How to implement child-parent aggregation link in C++?

  - by Giorgio

  Suppose that I have three classes P, C1, C2, composition (strong aggregation) relations between P <>- C1 and P <>- C2, i.e. every instance of P contains an instance of C1 and an instance of C2, which are destroyed when the parent P instance is destroyed. an association relation between instances of C1 and C2 (not necessarily between children of the same P). To implement this, in C++ I normally define three classes P, C1, C2, define two member variables of P of type boost::shared_ptr<C1>, boost::shared_ptr<C2>, and initialize them with newly created objects in P's constructor, implement the relation between C1 and C2 using a boost::weak_ptr<C2> member variable in C1 and a boost::weak_ptr<C1> member variable in C2 that can be set later via appropriate methods, when the relation is established. Now, I also would like to have a link from each C1 and C2 object to its P parent object. What is a good way to implement this? My current idea is to use a simple constant raw pointer (P * const) that is set from the constructor of P (which, in turn, calls the constructors of C1 and C2), i.e. something like: class C1 { public: C1(P * const p, ...) : paren(p) { ... } private: P * const parent; ... }; class P { public: P(...) : childC1(new C1(this, ...)) ... { ... } private: boost::shared_ptr<C1> childC1; ... }; Honestly I see no risk in using a private constant raw pointer in this way but I know that raw pointers are often frowned upon in C++ so I was wondering if there is an alternative solution.

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• Does your programming knowledge decrease if you don't practice?

  - by Codereview

  I'm a beginner programmer, I study languages such as C/C++/Python and Java (Mainly focused on C++). I'm What you'd call "Young and inexperienced" and I admit that because I can't claim otherwise. As a student I have many other problems besides programming.I practice programming as often as I can, and especially because my teacher gives me a lot more exercises than the rest of the class (It's a very low level), so oftentimes I spend weeks doing something else such as school projects or sports, or travelling, anything besides programming. Don't get me wrong though, I love programming, I love to build functional code, to watch as a program comes alive at the push of a button and to learn as much as I can - I simply don't have much time for it. Straight to the question, now: does your programming knowledge decrease as time passes and you don't practice? You may ask "How much time do you mean?". I don't mean a specific amount of time, but for reference you could take a month-two or even a year as an example. By knowledge I mean anything: From syntax to language functionality.

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• Reaching to the Holy Grail of Data Management

  - by Irem Radzik

  Pervasive, continuous access to trusted data. That’s the ultimate goal of data management. It enables to leverage data as an asset to create value for customers and the organization. It creates the strong foundation needed to move the business forward. How you get there is also critical. As with all IT initiatives using high performance solutions with low cost of ownership is another key requirement in today’s IT world. Oracle's  data integration product strategy focuses on helping customers achieve this ultimate goal with high performance and low TCO.  At OpenWorld, we will be showing how Oracle Data Integration products help you reach your data management goals, considering new trends in information management, such as big data and cloud computing. We will also provide an update on the latest product releases, such as Oracle GoldenGate 11gR2. If you will be at OpenWorld, please join us on Monday Oct 1st 10:45am at Moscone West – 3005 to hear our VP of Product Development, Brad Adelberg, present "Future Strategy, Direction, and Roadmap of Oracle’s Data Integration Platform". The Data Integration track at OpenWorld covers variety of topics and speakers. In addition to product management of Oracle GoldenGate, Oracle Data Integrator, and Enteprise Data Quality presenting product updates and roadmap, we have several customer panels and stand-alone sessions featuring select customers such as St. Jude Medical, Raymond James, Aderas, Turkcell, Paychex, Comcast,  Ticketmaster, Bank of America and more. You can see an overview of Data Integration sessions here. If you are not able to attend OpenWorld, please check out our latest resources for Data Integration and Oracle GoldenGate. In the coming weeks you will see more blogs about our products’ new capabilities and what to expect at OpenWorld. I hope to see you at OpenWorld and stay in touch via our future blogs. 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;}

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• How can i manage my personal notes , code snippets files in one place online [closed]

  - by user1758043

  Whenever i work on any project , then i have so much notes , diagrams files , image s, brainstorming ideas which i want to keep. i want to put them in one place so that i can see the history of my work. Is there any toll whichere i can store this online. my company is using confluence but thats costly for me. I want something for single user but online in clou where i can store Notes Code snippets Diagrams , flowchart Attah files , images Books marks , sites

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• Should I forward the a call to .Equals onto .Equals<T>?

  - by Jaimal Chohan

  So, I've got you bog standard c# object, overriding Equalsand implementing IEquatable public override int GetHashCode() { return _name.GetHashCode(); } public override bool Equals(object obj) { return Equals(obj as Tag) } #region IEquatable<Tag> Members public bool Equals(Tag other) { if (other == null) return false; else return _name == other._name; } #endregion Now, for some reason, I used to think that forwarding the calls from Equals into Equals was bad, no idea why, perhaps I read it a long time ago, anyway I'd write separate (but logically same) code for each method. Now I think forwarding Equals to Equals is okay, for obvious reasons, but for the life me I can't remember why I thought it wasn't before. Any thoughts?

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