Weblogic Administration Training Classes in Saarbrucken, Germany

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It is said that spoken languages shape thoughts by their inclusion and exclusion of concepts, and by structuring them in different ways. Similarly, programming languages shape solutions by making some tasks easier and others less aesthetic. Using F# instead of C# reshapes software projects in ways that prefer certain development styles and outcomes, changing what is possible and how it is achieved.

F# is a functional language from Microsoft's research division. While once relegated to the land of impractical academia, the principles espoused by functional programming are beginning to garner mainstream appeal.

As its name implies, functions are first-class citizens in functional programming. Blocks of code can be stored in variables, passed to other functions, and infinitely composed into higher-order functions, encouraging cleaner abstractions and easier testing. While it has long been possible to store and pass code, F#'s clean syntax for higher-order functions encourages them as a solution to any problem seeking an abstraction.

F# also encourages immutability. Instead of maintaining state in variables, functional programming with F# models programs as a series of functions converting inputs to outputs. While this introduces complications for those used to imperative styles, the benefits of immutability mesh well with many current developments best practices.

For instance, if functions are pure, handling only immutable data and exhibiting no side effects, then testing is vastly simplified. It is very easy to test that a specific block of code always returns the same value given the same inputs, and by modeling code as a series of immutable functions, it becomes possible to gain a deep and highly precise set of guarantees that software will behave exactly as written.

Further, if execution flow is exclusively a matter of routing function inputs to outputs, then concurrency is vastly simplified. By shifting away from mutable state to immutable functions, the need for locks and semaphores is vastly reduced if not entirely eliminated, and multi-processor development is almost effortless in many cases.

Type inference is another powerful feature of many functional languages. It is often unnecessary to specify argument and return types, since any modern compiler can infer them automatically. F# brings this feature to most areas of the language, making F# feel less like a statically-typed language and more like Ruby or Python. F# also eliminates noise like braces, explicit returns, and other bits of ceremony that make languages feel cumbersome.

Functional programming with F# makes it possible to write concise, easily testable code that is simpler to parallelize and reason about. However, strict functional styles often require imperative developers to learn new ways of thinking that are not as intuitive. Fortunately, F# makes it possible to incrementally change habits over time. Thanks to its hybrid object-oriented and functional nature, and its clean interoperability with the .net platform, F# developers can gradually shift to a more functional mindset while still using the algorithms and libraries with which they are most familiar.

 

Related F# Resources:

F# Programming Essentials Training

I will begin our blog on Java Tutorial with an incredibly important aspect of java development:  memory management.  The importance of this topic should not be minimized as an application's performance and footprint size are at stake.

From the outset, the Java Virtual Machine (JVM) manages memory via a mechanism known as Garbage Collection (GC).  The Garbage collector

  • Manages the heap memory.   All obects are stored on the heap; therefore, all objects are managed.  The keyword, new, allocates the requisite memory to instantiate an object and places the newly allocated memory on the heap.  This object is marked as live until it is no longer being reference.
  • Deallocates or reclaims those objects that are no longer being referened. 
  • Traditionally, employs a Mark and Sweep algorithm.  In the mark phase, the collector identifies which objects are still alive.  The sweep phase identifies objects that are no longer alive.
  • Deallocates the memory of objects that are not marked as live.
  • Is automatically run by the JVM and not explicitely called by the Java developer.  Unlike languages such as C++, the Java developer has no explict control over memory management.
  • Does not manage the stack.  Local primitive types and local object references are not managed by the GC.

So if the Java developer has no control over memory management, why even worry about the GC?  It turns out that memory management is an integral part of an application's performance, all things being equal.  The more memory that is required for the application to run, the greater the likelihood that computational efficiency suffers. To that end, the developer has to take into account the amount of memory being allocated when writing code.  This translates into the amount of heap memory being consumed.

Memory is split into two types:  stack and heap.  Stack memory is memory set aside for a thread of execution e.g. a function.  When a function is called, a block of memory is reserved for those variables local to the function, provided that they are either a type of Java primitive or an object reference.  Upon runtime completion of the function call, the reserved memory block is now available for the next thread of execution.  Heap memory, on the otherhand, is dynamically allocated.  That is, there is no set pattern for allocating or deallocating this memory.  Therefore, keeping track or managing this type of memory is a complicated process. In Java, such memory is allocated when instantiating an object:

String s = new String();  // new operator being employed
String m = "A String";    /* object instantiated by the JVM and then being set to a value.  The JVM
calls the new operator */

In Python, we can create three types of methods in a class:  instance or regular method, classmethod and staticmethod.  Instance methods are associated, as the name infers, with an instance or object of the class and take self as the first parameter.  Classmethods take a reference to the class, cls, as the first parameter of the class.  Staticmethods, for the most part, are convenience methods that could be declared as functions since they really do not have much to do with the class itself.  They were probably added at some time after the advent of Python in order to make the language more object oriented i.e. minimize the number of free floating functions. 

Refer the our article static, class and regular methods in Python for a detailed explanation on this subject.

 
Technology is changing all the time, and the jobs that are associated with technology are changing as well. People that are looking at careers in technology will see some jobs that are being phased out as others increase in popularity. This means that people that are interested in tech jobs should be vigilant in researching those opportunities that are growing in demand.
 
A Dying Breed of Legacy Systems
 
The mainframe programmers i.e., COBOL, have been getting phased out for years, and are reaching retirement age. The demand for these skills are at an end of an era as more technology surfaces with needs for app development and cloud migration. These jobs will be phased out and are being replaced with developers that are knowledgeable in more object-oriented programming positions such as Java, C#, and etc. 
 
Programmers / Analysts
 
Professionals that work in software development, can find work in a number of different tech careers. People that know how to program, particularly in object oriented programming, can expect to be employed and in demand for some time to come. The salaries for programmers range from $50k – millions, depending on the skillsets one has mastered. Like any other profession, one can opt to learn just enough to get by or hone in on a discipline currently in demand and master it, such as data analysts, machine learning analyst and cloud migration specialists.  
 
 
Tech Support for Portable Devices
 
The healthcare industry is seeing a rise in jobs in Information Technology because more hospitals are going paperless. There is a great demand for people that have the ability to work with portable devices because this is what many doctors and nurses will be using as they move away from the long paper trail that has been created from patients. People that have the ability to configure and troubleshoot portable devices like tablets and phones are able to support the applications for these devices will be in high demand. In this case, learning programming languages such a C++ is the perfect route to go in. 
 
 
Technology Trainers 
 
There will always be a need for someone that can learn, utilize and teach proprietary programs to others. Internal proprietary technology will need to be updated which means that technology trainers are expected to be current in the knowledge base for  companies that are utilizing this software. People that are in the training field, will need to stay updated with new technology, grasp new concepts quickly and be able to teach it efficiently. As more companies take hold of proprietary programs, it becomes important for software application trainers to be put in place to teach this technology. 
 
Printer Support Jobs Dwindle
 
People that are working in the technology field of printer support will need to consider looking at other opportunities because some of these printer support jobs will be phased out.  There is a reason for this. More jobs are becoming phased out in the world of printer technology because fewer people are using printers. It has become easier to read the documents and transfer these documents to other workers inside an organization. This means that less money is being spent on printers. Even less money is being spent on printer support. People that have acquired jobs where their primary role is to work in printer repair will see a decline in the number of people that are needed for these types of positions. It becomes a lot less feasible to have printer repair people in place when there is no printer in the office.
 
 
Graphic Design
 
Technology also holds a special place for those that have the experience in graphic design. Websites and social media really engage people in visual art and people that know how to display it on web pages have a plethora of jobs. This leaves this field wide open for those that know about design structures and editing images that can result in eye catching imagery.
 
Wan/ Lan Management
 
One big area that offers an array of different jobs is the area of wide and local network router and switch management. People that are proficient in programming switches and building networks can get themselves a number of jobs dealing with the network topology. Tech careers are booming when it comes to this type of field because many people do not have this experience. They may know how to set up computers, but they may not have any idea about what to do if the network connection is no longer working properly.
 
People that know how to configure switches for networks and troubleshoot these issues with network connectivity will have a wide range of geographical locations that they connect together to build one network for a business.

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A successful career as a software developer or other IT professional requires a solid understanding of software development processes, design patterns, enterprise application architectures, web services, security, networking and much more. The progression from novice to expert can be a daunting endeavor; this is especially true when traversing the learning curve without expert guidance. A common experience is that too much time and money is wasted on a career plan or application due to misinformation.

The Hartmann Software Group understands these issues and addresses them and others during any training engagement. Although no IT educational institution can guarantee career or application development success, HSG can get you closer to your goals at a far faster rate than self paced learning and, arguably, than the competition. Here are the reasons why we are so successful at teaching:

  • Learn from the experts.
    1. We have provided software development and other IT related training to many major corporations in Germany since 2002.
    2. Our educators have years of consulting and training experience; moreover, we require each trainer to have cross-discipline expertise i.e. be Java and .NET experts so that you get a broad understanding of how industry wide experts work and think.
  • Discover tips and tricks about Weblogic Administration programming
  • Get your questions answered by easy to follow, organized Weblogic Administration experts
  • Get up to speed with vital Weblogic Administration programming tools
  • Save on travel expenses by learning right from your desk or home office. Enroll in an online instructor led class. Nearly all of our classes are offered in this way.
  • Prepare to hit the ground running for a new job or a new position
  • See the big picture and have the instructor fill in the gaps
  • We teach with sophisticated learning tools and provide excellent supporting course material
  • Books and course material are provided in advance
  • Get a book of your choice from the HSG Store as a gift from us when you register for a class
  • Gain a lot of practical skills in a short amount of time
  • We teach what we know…software
  • We care…
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