Linux and Unix Training in Bryan, Texas

In programming, memory leaks are a common issue, and it occurs when a computer uses memory but does not give it back to the operating system. Experienced programmers have the ability to diagnose a leak based on the symptoms. Some believe every undesired increase in memory usage is a memory leak, but this is not an accurate representation of a leak. Certain leaks only run for a short time and are virtually undetectable.

Memory Leak Consequences

Applications that suffer severe memory leaks will eventually exceed the memory resulting in a severe slowdown or a termination of the application.

How to Protect Code from Memory Leaks?

Preventing memory leaks in the first place is more convenient than trying to locate the leak later. To do this, you can use defensive programming techniques such as smart pointers for C++. A smart pointer is safer than a raw pointer because it provides augmented behavior that raw pointers do not have. This includes garbage collection and checking for nulls.

If you are going to use a raw pointer, avoid operations that are dangerous for specific contexts. This means pointer arithmetic and pointer copying. Smart pointers use a reference count for the object being referred to. Once the reference count reaches zero, the excess goes into garbage collection. The most commonly used smart pointer is shared_ptr from the TR1 extensions of the C++ standard library.

Static Analysis

The second approach to memory leaks is referred to as static analysis and attempts to detect errors in your source-code. CodeSonar is one of the effective tools for detection. It provides checkers for the Power of Ten coding rules, and it is especially competent at procedural analysis. However, some might find it lagging for bigger code bases.

How to Handle a Memory Leak

For some memory leaks, the only solution is to read through the code to find and correct the error. Another one of the common approaches to C++ is to use RAII, which an acronym for Resource Acquisition Is Initialization. This approach means associating scoped objects using the acquired resources, which automatically releases the resources when the objects are no longer within scope. RAII has the advantage of knowing when objects exist and when they do not. This gives it a distinct advantage over garbage collection. Regardless, RAII is not always recommended because some situations require ordinary pointers to manage raw memory and increase performance. Use it with caution.

The Most Serious Leaks

Urgency of a leak depends on the situation, and where the leak has occurred in the operating system. Additionally, it becomes more urgent if the leak occurs where the memory is limited such as in embedded systems and portable devices.

To protect code from memory leaks, people have to stay vigilant and avoid codes that could result in a leak. Memory leaks continue until someone turns the system off, which makes the memory available again, but the slow process of a leak can eventually prejudice a machine that normally runs correctly.

The Five Principles of Performance

In Demand IT Skills

Working With Loops In Python

[Oct, 30, 2012] |
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Sometimes we have to repeat ourselves before we are heard. Then again there are times where we have to perform a certain action the same way several times before we can carry on with what we want to do.

Repetition is the keyword here and for humans that is something we generally try to avoid. Yet our digital friends love repetition. They never get tired and they never get bored of doing the same thing over and over again countless times.

So it’s little wonder then that all modern programming languages give us various ways in which we can perform a certain action as many times as we need.

In python we have the for statement which gives us the power to loop over large collections of data very quickly and efficiently.

The Templatization of Business Rules

[Jul, 05, 2012] |
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A business rule is the basic unit of rule processing in a Business Rule Management System (BRMS) and, as such, requires a fundamental understanding. Rules consist of a set of actions and a set of conditions whereby actions are the consequences of each condition statement being satisfied or true. With rare exception, conditions test the property values of objects taken from an object model which itself is gleaned from a Data Dictionary and UML diagrams. See my article on Data Dictionaries for a better understanding on this subject matter.

A simple rule takes the form:

if condition(s)

then actions.

An alternative form includes an else statement where alternate actions are executed in the event that the conditions in the if statement are not satisfied:

if condition(s)

then actions

else alternate_actions

It is not considered a best prectice to write rules via nested if-then-else statements as they tend to be difficult to understand, hard to maintain and even harder to extend as the depth of these statements increases; in other words, adding if statements within a then clause makes it especially hard to determine which if statement was executed when looking at a bucket of rules. Moreoever, how can we determine whether the if or the else statement was satisfied without having to read the rule itself. Rules such as these are often organized into simple rule statements and provided with a name so that when reviewing rule execution logs one can determine which rule fired and not worry about whether the if or else statement was satisfied. Another limitation of this type of rule processing is that it does not take full advantage of rule inferencing and may have a negative performance impact on the Rete engine execution. Take a class with HSG and find out why.

Rule Conditions

3 Most Important Things Non-Programmers Should Know About Programming?

[May, 11, 2018] |
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What are the three most important things non-programmers should know about programming?

Written by Brian Knapp, credit and reprint CodeCareerGenius

Since you asked for the three most important things that non-programmers should know about, and I’ve spent most of my career working with more non-programmers than programmers, I have a few interesting things that would help.

Number One - It Is Impossible To Accurately Estimate Software Projects

No matter what is tried. No matter what tool, agile approach, or magic fairy dust people try to apply to creating software… accurately predicting software project timelines is basically impossible.

There are many good reasons for this. Usually, requirements and feature ideas change on a daily/weekly basis. Often it is impossible to know what needs to be done without actually digging into the code itself. Debugging and QA can take an extraordinary amount of time.

And worst of all…

Project Managers are always pushing for shorter timelines. They largely have no respect for reality. So, at some point they are given estimates just to make them feel better about planning.

No matter how much planning and estimation you do, it will be wrong. At best it will be directionally correct +/- 300% of what you estimated. So, a one year project could actually take anywhere between 0 and 5 years, maybe even 10 years.

If you think I’m joking, look at how many major ERP projects that go over time and over budget by many years and many hundreds of millions of dollars. Look at the F-35 fighter jet software issues.

Or in the small, you can find many cases where a “simple bug fix” can take days when you thought it was hours.

All estimates are lies made up to make everyone feel better. I’ve never met a developer or manager who could accurately estimate software projects even as well as the local weatherman(or woman) predicts the weather.

Number Two - Productivity Is Unevenly Distributed

What if I told you that in the average eight hour work day the majority of the work will get done in a 30 minute timeframe? Sound crazy?

Well, for most programmers there is a 30–90 minute window where you are extraordinarily productive. We call this the flow state.

Being in the flow state is wonderful and amazing. It often is where the “magic” of building software happens.

Getting into flow can be difficult. It’s akin to meditation in that you have to have a period of uninterrupted focus of say 30 minutes to “get in” the flow, but a tiny interruption can pull you right out.

Now consider the modern workplace environment. Programmers work in open office environments where they are invited to distract each other constantly.

Most people need a 1–2 hour uninterrupted block to get 30–90 minutes of flow.

Take the 8 hour day and break it in half with a lunch break, and then pile in a few meetings and all of a sudden you are lucky to get one decent flow state session in place.

That is why I say that most of the work that gets done happens in a 30 minute timeframe. The other 7–8 hours are spent being distracted, answering email, going to meetings, hanging around the water cooler, going to the bathroom, and trying to remember what you were working on before all these distractions.

Ironically, writers, musicians, and other creative professionals have their own version of this problem and largely work alone and away from other people when they are creating new things.

Someday the programming world might catch on, but I doubt it.

Even if this became obvious, it doesn’t sit well with most companies to think that programmers would be paid for an 8 hour day and only be cranking out code for a few hours on a good day. Some corporate middle manager would probably get the bright idea to have mandatory flow state training where a guru came in and then there would be a corporate policy from a pointy haired boss mandating that programmers are now required to spend 8 hours a day in flow state and they must fill out forms to track their time and notify their superiors of their flow state activities, otherwise there would be more meetings about the current flow state reports not being filed correctly and that programmers were spending too much time “zoning out” instead of being in flow.

Thus, programmers would spent 7–8 hours a day pretending to be in flow state, reporting on their progress, and getting all their work done in 30 minutes of accidental flow state somewhere in the middle of all that flow state reporting.

If you think I’m joking about this, I’m not. I promise you this is what would happen to any company of more than 2 employees. (Even the ones run by programmers.)

Number Three - It Will Cost 10x What You Think

Being a programmer, I get a lot of non-programmers telling me about their brilliant app ideas. Usually they want me to build something for free and are so generous as to pay me up to 5% of the profits for doing 100% of the work.

Their ideas are just that good.

Now, I gently tell them that I’m not interested in building anything for free.

At that point they get angry, but a few ask how much it will cost. I give them a reasonable (and very incorrect) estimate of what it would cost to create the incredibly simple version of their app idea.

Let’s say it’s some number like $25,000.

They look at me like I’m a lunatic, and so I explain how much it costs to hire a contract programmer and how long it will actually take. For example’s sake let’s say it is $100/hr for 250 hours.

To be clear, these are made up numbers and bad estimates (See Number One for details…)

In actuality, to build the actual thing they want might cost $250,000, or even $2,500,000 when it’s all said and done.

Building software can be incredibly complex and expensive. What most people can’t wrap their head around is the fact that a company like Google, Apple, or Microsoft has spent BILLIONS of dollars to create something that looks so simple to the end user.

Somehow, the assumption is that something that looks simple is cheap and fast to build.

Building something simple and easy for the end user is time consuming and expensive. Most people just can’t do it.

So, the average person with a brilliant app idea thinks it will cost a few hundred or maybe a few thousand dollars to make and it will be done in a weekend is so off the mark it’s not worth considering their ideas.

And programmers are too eager to play along with these bad ideas (by making bad estimates and under charging for their time) that this notion is perpetuated to the average non-programmer.

So, a good rule of thumb is that software will cost 10 times as much as you think and take 10 times as long to finish.

And that leads to a bonus point…

BONUS - Software Is Never Done

Programmers never complete a software project, they only stop working on it. Software is never done.

I’ve worked at many software companies and I’ve never seen a software project “completed”.

Sure, software gets released and used. But, it is always changing, being updated, bugs get fixed, and there are always new customer requests for features.

Look at your favorite software and you’ll quickly realize how true this is. Facebook, Instagram, Google Search, Google Maps, GMail, iOS, Android, Windows, and now even most video games are never done.

There are small armies of developers just trying to keep all the software you use every day stable and bug free. Add on the fact that there are always feature requests, small changes, and new platforms to deal with, it’s a treadmill.

So, the only way out of the game is to stop working on software. At that point, the software begins to decay until it is no longer secure or supported.

Think about old Windows 3.1 software or maybe old Nintendo Cartridge video games. The current computers and video game consoles don’t even attempt to run that software anymore.

You can’t put an old video game in your new Nintendo Switch and have it “just work”. That is what happens when you think software is done.

When programmers stop working on software the software starts to die. The code itself is probably fine, but all the other software keeps moving forward until your software is no longer compatible with the current technology.

So, those are the four most important things that non-programmers should know about programming. I know you asked for only three, so I hope the bonus was valuable to you as well.

Tech Life in Texas

Austin may be considered the live music capital of the world but the field of technology is becoming the new norm in the The Lone Star State. Home to Dell and Compaq computers, there is a reason why central Texas is often referred to as the Silicon Valley of the south. Itâ€™s rated third on the charts of the top computer places in the United States with a social learning and training IT atmosphere. Adding the fact that Austin offers fairly inexpensive living costs for students, software developers may take note as they look to relocate.

Learning isn't a means to an end; it is an end in itself. ~ Robert Heinlein

other Learning Options

Software developers near Bryan have ample opportunities to meet like minded techie individuals, collaborate and expend their career choices by participating in Meet-Up Groups. The following is a list of Technology Groups in the area.

San Antonio ExpressionEngine User Group · Hacker News Houston TX Meetup · Dallas/Fort Worth Qt Developers ·

Fortune 500 and 1000 companies in Texas that offer opportunities for Linux Unix developers

Company Name	City	Industry	Secondary Industry
Dr Pepper Snapple Group	Plano	Manufacturing	Nonalcoholic Beverages
Western Refining, Inc.	El Paso	Energy and Utilities	Gasoline and Oil Refineries
Frontier Oil Corporation	Dallas	Manufacturing	Chemicals and Petrochemicals
ConocoPhillips	Houston	Energy and Utilities	Gasoline and Oil Refineries
Dell Inc	Round Rock	Computers and Electronics	Computers, Parts and Repair
Enbridge Energy Partners, L.P.	Houston	Transportation and Storage	Transportation & Storage Other
GameStop Corp.	Grapevine	Retail	Retail Other
Fluor Corporation	Irving	Business Services	Management Consulting
Kimberly-Clark Corporation	Irving	Manufacturing	Paper and Paper Products
Exxon Mobil Corporation	Irving	Energy and Utilities	Gasoline and Oil Refineries
Plains All American Pipeline, L.P.	Houston	Energy and Utilities	Gasoline and Oil Refineries
Cameron International Corporation	Houston	Energy and Utilities	Energy and Utilities Other
Celanese Corporation	Irving	Manufacturing	Chemicals and Petrochemicals
HollyFrontier Corporation	Dallas	Energy and Utilities	Gasoline and Oil Refineries
Kinder Morgan, Inc.	Houston	Energy and Utilities	Gas and Electric Utilities
Marathon Oil Corporation	Houston	Energy and Utilities	Gasoline and Oil Refineries
United Services Automobile Association	San Antonio	Financial Services	Personal Financial Planning and Private Banking
J. C. Penney Company, Inc.	Plano	Retail	Department Stores
Energy Transfer Partners, L.P.	Dallas	Energy and Utilities	Energy and Utilities Other
Atmos Energy Corporation	Dallas	Energy and Utilities	Alternative Energy Sources
National Oilwell Varco Inc.	Houston	Manufacturing	Manufacturing Other
Tesoro Corporation	San Antonio	Manufacturing	Chemicals and Petrochemicals
Halliburton Company	Houston	Energy and Utilities	Energy and Utilities Other
Flowserve Corporation	Irving	Manufacturing	Tools, Hardware and Light Machinery
Commercial Metals Company	Irving	Manufacturing	Metals Manufacturing
EOG Resources, Inc.	Houston	Energy and Utilities	Gasoline and Oil Refineries
Whole Foods Market, Inc.	Austin	Retail	Grocery and Specialty Food Stores
Waste Management, Inc.	Houston	Energy and Utilities	Waste Management and Recycling
CenterPoint Energy, Inc.	Houston	Energy and Utilities	Gas and Electric Utilities
Valero Energy Corporation	San Antonio	Manufacturing	Chemicals and Petrochemicals
FMC Technologies, Inc.	Houston	Energy and Utilities	Alternative Energy Sources
Calpine Corporation	Houston	Energy and Utilities	Gas and Electric Utilities
Texas Instruments Incorporated	Dallas	Computers and Electronics	Semiconductor and Microchip Manufacturing
SYSCO Corporation	Houston	Wholesale and Distribution	Grocery and Food Wholesalers
BNSF Railway Company	Fort Worth	Transportation and Storage	Freight Hauling (Rail and Truck)
Affiliated Computer Services, Incorporated (ACS), a Xerox Company	Dallas	Software and Internet	E-commerce and Internet Businesses
Tenet Healthcare Corporation	Dallas	Healthcare, Pharmaceuticals and Biotech	Hospitals
XTO Energy Inc.	Fort Worth	Energy and Utilities	Gasoline and Oil Refineries
Group 1 Automotive	Houston	Retail	Automobile Dealers
ATandT	Dallas	Telecommunications	Telephone Service Providers and Carriers
Anadarko Petroleum Corporation	Spring	Energy and Utilities	Gasoline and Oil Refineries
Apache Corporation	Houston	Energy and Utilities	Gasoline and Oil Refineries
Dean Foods Company	Dallas	Manufacturing	Food and Dairy Product Manufacturing and Packaging
American Airlines	Fort Worth	Travel, Recreation and Leisure	Passenger Airlines
Baker Hughes Incorporated	Houston	Energy and Utilities	Gasoline and Oil Refineries
Continental Airlines, Inc.	Houston	Travel, Recreation and Leisure	Passenger Airlines
RadioShack Corporation	Fort Worth	Computers and Electronics	Consumer Electronics, Parts and Repair
KBR, Inc.	Houston	Government	International Bodies and Organizations
Spectra Energy Partners, L.P.	Houston	Energy and Utilities	Gas and Electric Utilities
Energy Future Holdings	Dallas	Energy and Utilities	Energy and Utilities Other
Southwest Airlines Corporation	Dallas	Transportation and Storage	Air Couriers and Cargo Services

training details locations, tags and why hsg

the hartmann software group advantage

why take Linux Unix Training with the hartmann software group?

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 Texas 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 Linux Unix programming
Get your questions answered by easy to follow, organized Linux Unix experts
Get up to speed with vital Linux Unix 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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·Frisco, Texas · Killeen, TX · Fort Worth · Pasadena, TX ·Pearland, Texas · Richardson, TX ·Waco, Texas · Lewisville, TX · Mesquite · Edinburg, TX ·Pharr, Texas · Plano, TX ·Euless, Texas · Amarillo, TX · Missouri City · Irving, TX ·Wichita Falls, Texas · McAllen, TX ·Laredo, Texas · Temple, TX · Bryan · Harlingen, TX ·Port Arthur, Texas · Victoria, TX ·Corpus Christi, Texas · North Richland Hills, TX · Round Rock · Grapevine, TX ·Dallas, Texas · Longview, TX ·Baytown, Texas · Lubbock, TX · Rowlett · Flower Mound, TX ·Austin, Texas · Midland, TX ·Tyler, Texas · El Paso, TX · Galveston · Carrollton, TX ·Denton, Texas · Grand Prairie, TX ·New Braunfels, Texas · McKinney, TX · San Angelo · Sugar Land, TX ·League City, Texas · Houston, TX ·Beaumont, Texas · Brownsville, TX · Conroe · Allen, TX ·Arlington, Texas · College Station, TX ·Garland, Texas · Odessa, TX · Mission · Cedar Park, TX ·San Marcos, Texas · Abilene, TX ·San Antonio, Texas

Linux Unix Training Classes in Bryan, Texas

Learn Linux Unix in Bryan, Texas and surrounding areas via our hands-on, expert led courses. All of our classes either are offered on an onsite, online or public instructor led basis. Here is a list of our current Linux Unix related training offerings in Bryan, Texas: Linux Unix Training

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Linux Unix Training Catalog

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Tech Life in Texas

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