• November 29, 2020 /  Computer Technology, Programming

    In the previous issue we’ve become acquainted with a shell script and managed to create a very simple shell script. If we look, we did not perform any processing on the shell script. We only show a message on the screen and execute commands on the shell through shell script. What if we want to make the program more interactive shell script?

    As with any programming language, shell script also serves to recognize the variables that can hold information temporarily for a variety of purposes, for example to compute or determine the output results. You may make as much as possible or use a variable in your shell script. Name the variables are independent, large and small letters should, but make it easier to remember, make it a habit to create standard rules in the manufacture of the variable name. At this writing, all variables will be written in lowercase.

    Variables can be divided into two types, namely environment variables and user variables. Environment variables are variables that have been previously determined as a part of the shell used (bash). By default, the name of this variable using all capital letters. Example of this is the $ USER variable that will contain the user name you are currently using, $ HOME home directory which contains the address of the user that is used, and so forth. To display the entire value of an existing environment variable, you can use the set command in the terminal (Figure 1). User variable is the variable name specified by the user themselves and not by the shell used.

    Variables can be accessed by using the dollar sign ($) before the variable name, for example, we have a variable named “my name”, to access the value stored in the variable, we use the $ my name. To give value to a variable, we use the sign “=” is immediately followed by the value we give without any spaces, for example my name = Willy. What if the value that we want to give is a sentence? Use double quotes as the opening and closing value of a variable, such as my name = “Willy Sudiarto Raharjo”. For example, see listing 1 and try running on your computer. Seen that the value of the variable Sudiarto be regarded as a command and not part of the variable because it is not enclosed in double quotation marks. Please be careful in giving a value to a variable.

    You can combine environment variables and user variables in a shell script is the same, as in listing 2. What if want to write a message using the $ character, such as “It cost me $ 15”? If we are not careful, it could be a shell script would be wrong to interpret the information that we provide and try to take the value of variable 1 (which will not contain any) and display it as a “price 5”. To fix this, use the escape character to indicate that the next character will be recognized as a regular character and not as a substitute for a variable, which marks the backslash “\” as in listing 3.

    One character that needs more attention is the backtick character “` “(position number 1 on the left side your keyboard) because this character has a special function in shell programming, which is able to accommodate the output of a shell command in a variable. As an example, we will hold the result of the date command into a variable date and display its contents using the echo command as in listing 4.

    To be able to receive input from the user and store it into a variable, we can use the read function is followed by the name of the variable that we want to use to store the values ​​as in Example 5 listings.

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  • 5 Coding Hacks to Reduce GC Overhead

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    November 27, 2020 /  Computer Technology, Programming

    In this post we’ll look at five ways in roomates efficient coding we can use to help our garbage collector CPU spend less time allocating and freeing memory, and reduce GC overhead. Often Long GCs can lead to our code being stopped while memory is reclaimed (AKA “stop the world”). Duke_GCPost

    Some background

    The GC is built to handle large amounts of allocations of short-lived objects (think of something like rendering a web page, where most of the objects allocated Become obsolete once the page is served).

    The GC does this using what’s called a “young generation” – a heap segment where new objects are allocated. Each object has an “age” (placed in the object’s header bits) defines how many roomates collections it has “survived” without being reclaimed. Once a certain age is reached, the object is copied into another section in the heap called a “survivor” or “old” generation.

    The process, while efficient, still comes at a cost. Being Able to reduce the number of temporary allocations can really help us increase of throughput, especially in high-scale applications.

    Below are five ways everyday we can write code that is more memory efficient, without having to spend a lot of time on it, or reducing code readability.

    1. Avoid implicit Strings

    Strings are an integral part of almost every structure of data we manage. Being much heavier than other primitive values, they have a much stronger impact on memory usage.

    One of the most important things to note is that Strings are immutable. They can not be modified after allocation. Operators such as “+” for concatenation actually allocate a new String containing the contents of the strings being joined. What’s worse, is there’s an implicit StringBuilder object that is allocated to actually do the work of combining them.

    For example –

    1
    a = a + b; / / a and b are Strings
    The compiler generates code comparable behind the scenes:

    1
    StringBuilder temp = new StringBuilder (a).
    2
    temp.append (b);
    3
    a = temp.toString () / / a new string is allocated here.
    4
    / / The previous “a” is now garbage.
    But it gets worse.

    Let’s look at this example –

    1
    String result = foo () + arg;
    2
    result + = boo ();
    3
    System.out.println (“result =” + result);
    In this example we have 3 StringBuilders allocated in the background – one for each plus operation, and two additional Strings – one to hold the result of the second assignment and another to hold the string passed into the print method. That’s 5 additional objects in what would otherwise Appear to be a pretty trivial statement.

    Think about what happens in real-world scenarios such as generating code a web page, working with XML or reading text from a file. Within a nested loop structures, you could be looking at Hundreds or Thousands of objects that are implicitly allocated. While the VM has Mechanisms to deal with this, it comes at a cost – one paid by your users.

    The solution: One way of reducing this is being proactive with StringBuilder allocations. The example below Achieves the same result as the code above while allocating only one StringBuilder and one string to hold the final result, instead of the original five objects.

    1
    StringBuilder value = new StringBuilder (“result =”);
    2
    value.append (foo ()). append (arg). append (boo ());
    3
    System.out.println (value);
    By being mindful of the way Strings are implicitly allocated and StringBuilders you can materially reduce the amount of short-term allocations in high-scale code locations.

    2. List Plan capacities

    Dynamic collections such as ArrayLists are among the most basic dynamic structures to hold the data length. ArrayLists and other collections such as HashMaps and implemented a Treemaps are using the underlying Object [] arrays. Like Strings (Themselves wrappers over char [] arrays), arrays are also immutable. Becomes The obvious question then – how can we add / put items in their collections if the underlying array’s size is immutable? The answer is obvious as well – by allocating more arrays.

    Let’s look at this example –

    1
    List <Item> <Item> items = new ArrayList ();
    2

    3
    for (int i = 0; i <len; i + +)
    4
    {
    5
    Item item = readNextItem ();
    6
    items.add (item);
    7
    }
    The value of len Determines the ultimate length of items once the loop finishes. This value, however, is unknown to the constructor of the ArrayList roomates allocates a new Object array with a default size. Whenever the internal capacity of the array is exceeded, it’s replaced with a new array of sufficient length, making the previous array of garbage.

    If you’re executing the loop Welcome to Thunderbird times you may be forcing a new array to be allocated and a previous one to be collected multiple times. For code running in a high-scale environment, these allocations and deallocations are all deducted from your machine’s CPU cycles.
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  • 3 Tips from Someone With Experience

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    November 26, 2020 /  Advertising & Marketing

    How To Get The Best Dental Health Products
    When dental health is being discussed, dental health supplements steel bite pro bbb reviews should be talked about because they play a role in alleviating dental issues which occur when the relevant nutrients are missing in the diet. Various dental health supplements are created naturally through the extraction of nutritional components including calcium, vitamin A and phosphorus which are easily converted into forms that steel bite pro affiliate program can be swallowed. It is an easy task to find such dental health supplements since they are sold in many outlets where people experiencing steel bite pro amazon dental problems can purchase especially if a few things are considered.
    One thing you should look out for in a shop offering dental health supplements is the existence of certificates given to them by government experts who check and certify for such products to be sold. The benefit of buying from a certified shop is that you will be acquiring legitimate dental health supplements which will be efficient in healing your dental disorder.
    Secondly, you must steel bite pro bbb look for dental health supplements from the shop where you are assured of saving some cash while receiving steel bite pro real reviews quality dental products in return. Good dental supplements stores should also put up discount sales on their products so that you steel bite pro better business bureau save when you buy a large quantity of dental supplements.
    The third factor is to find a dental supplements outlet where you will not spend time and money to get there for purchases since it is possible to identify one that is within your neighborhood steel bite protocol and offers the kind of quality dental products you require. Getting your supplies of dental health supplements from a store that is nearest to steel bite pro complaints your house means that you have the advantage of going outside and getting what the dentist recommended without worrying about traveling a long way.

    Another factor is to look for the dental health supplements that promises to deliver for free all the products you have purchased as long as you provide your address so that everything is dropped to
    by a delivery person to your house. Dental supplements suppliers that offer free delivery prove to be important during periods when you are caught up with domestic tasks that do not steel bite pro at walmart allow you to go out and shop since they bring what you require to your place.

    Lastly, you should find a dental supplements store that has the reputation of attracting clients who purchase their dental products from them because this makes it possible for you to trust their products and services steel bite pro australia which are trustworthy. This can be possible if you ask for recommendations about the best dental health supplements stores from friends or other people who have used such supplements for their dental health after being given advice by dentists.

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  • Overwhelmed by the Complexity of ? This May Help

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    November 26, 2020 /  Internet Services

    Tips to look into Whenmeticore bad reviews Choosing a Weight loss supplement

    Checking on the rime response of the Weight loss supplement you area hiring is advisable. Some companies can be disappointing when you desperately need services from them, and they end up getting you delayed. One gets to avoid such companies by checking on the Weight loss supplement’s timeline. Ensure that you check on the timelines before getting into an agreement. If their timings favors your need of services then you can sign the contract. one gets to know the timelines of the Weight loss supplement by asking people who area familiar with it. Companies with convenient working hours even operate during the night hour. To ensure that you don’t run out services from companies ensure that you choose one that operates round the clock. This guarantees you of getting emergency services when they rise.

    One needs to be aware of the location of the Weight loss supplement you area hiring. This is because you will at one point need to get services physically from the Weight loss supplement. If it’s in a far location then you can get challenges accessing the services. Therefore when doing your selection first check on the companies around your neighborhood. Such locally available companies may be the best in service provision hence you should give them a first thought. Due to the distance and timelines of the companies that are not around you may encounter delays when getting served. Choosing a Weight loss supplement that is within your locality ensures that you get your service faster. However it’s better to choose a Weight loss supplement that is familiar to you than that in a location you don’t. Its due to transportation fees that’s why companies in far location are meticore ingredientsdiscouraged. People who select companies that are far away ends up paying the transport fee which can at times be expensive. You will never experience delays when you choose a Weight loss supplement in your locality.
    The duration of time the Weight loss supplement has been providing services to clients should be checked. There are people who nmeticore before and after picturesever bother inquiring the years the Weight loss supplement has been serving clients. Newbie companies are not perfect in the services they provide to clients thus be careful not to lameticore and high blood pressurend on them. It’s therefore important to check in your area for companies that are already established in the market as there is a likelihood of those companies given the best services. Since such companies consider the taste and preference clients gets the best services. This is because such companies are knowledgeable of the tasks they provide to clients.

  • How I Became An Expert on

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    November 26, 2020 /  Pets & Animals

    How to Choose a Top-Rated DUI Attorney in Pennsylvania

    Any driving should have the contact information of a professional DUI attorney on their contact list because one may need to use their service at any moment. Looking to a competent DUI attorney in the industry is however not an easy task. This is because in the last decade, there has been a rise in the number of DUI attorneys available in the industry. It is important to compare the ratings of various DUI attorneys in the industry before you make a choice. This will allow you to find the most positively reviewed DUI attorney in the industry. You should also keep the expertise of the chosen DUI attorney in mind when making your selection. You can waste a lot of money on the services of an incompetent DUI attorney. It is advisable to use the information provided by friends to choose a the most reputable DUI attorney in the industry. This post will outline the guidelines for selecting the most professional DUI attorney in the industry.

    The expertise of the selected DUI attorney is the first thing to review. It is essential to use the services of the most professional DUI attorney in the industry. Assessing the DUI attorney’s credentials will enable you to learn about their expertise. It is also vital to put the DUI attorney’s pricing in mind when making your selection. It is vital to assess the rates of all the DUI attorneys in the industry during the decision-making process. Reviewing the DUI attorney’s site will enable you to learn about their rates.

    The eligibility of the chosen DUI attorney is the second thing to review. You should use the services of the most eligible DUI attorney in the industry. You can learn about the certification of the chosen DUI attorney by going through their site. The number of years that the chosen DUI attorney has been in the industry is also a critical thing to review. Make sure that you use a DUI attorney that has been in the market for a long time. It is advisable to hire a DUI attorney with an experience level of at least eight years. You can ensure that you pick a DUI attorney that has been in the industry for a long period by consulting with their clients.

    Lastly, put the DUI attorney’s reputation in mind when making your selection. Make sure that you hire a DUI attorney with a good reputation in the industry. You can ensure that you use the most reputable DUI attorney in the industry by assessing their rating. This will help you to learn about the benefits and shortcomings of working with the selected DUI attorney. You should be able to choose a reputable DUI attorney in the industry after assessing their reviews. You should avoid selecting a DUI attorney with no or very few good reviews.

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  • Study: My Understanding of

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    November 26, 2020 /  Personal Product & Services

    How to Choose the Best Concrete Services

    New styles for houses are being adopted due to the presence of concrete counterparts. Concrete is a flexible and durable material used for making foundations, floor, and walls. You can get your office, home, or any other building decorated as concrete designers have realized the decorative potential of concrete. Buildings designed using concrete are irresistible due to the versatility and craft skills. You ought to find someone who has skills and experience working with concrete for your building. This article explains different factors you need to consider when choosing a concrete contractor. By offering quality work, you will get satisfaction from a concrete contractor.

    There are many factors that affect how a job is done since concrete jobs vary from one place to another. To get quality concrete job done at the right time, consider hiring a professional concrete contractor There are a few things you should do to ensure you get a good company for your concrete work. When you are not keen on choosing a concrete company, you may end up with a job done terribly costing you far more than it should have. You can get a list of different companies when you search online or check the yellow pages listing. A better idea is to look for companies with higher ratings in this field and contact them.

    In addition, consult from people who you can trust to get a good concrete contractor for your job. Make a call to the companies you have selected to find out if they are available for your job. You can make a decision from how a company treats their customers by utilizing this chance. If you happen to find out that the company is disorganized in any way, consider looking for a better company. It is recommended that you meet with the company to get a better idea of how it is likely to handle your work.

    Concerns and questions regarding your concrete job can be asked when you meet with the company. The behavior of a concrete contractor in front of a client determines how they are likely to handle the job. It is important to consider professionalism and proper organization as they are aspects of a good business. Lastly, ask for portfolios or a record of past work that is similar to what you have in order to determine whether you will be satisfied with their services. It is recommended that you continue with the search if the company portfolio does not meet your expectations. Before hiring a contractor, you should inspect and validate his or her license. Signing a contract between you and your contractor will help prevent any complaints that may emerge in the future.

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  • A Simple Plan For Investigating

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    November 26, 2020 /  Web Resources

    How to Identify the Number One Tree Removal Services

    The job of tree removal is prone to very many risks. Because of this risks, it is best to leave the tree removal job in the hands of experts rather than carry out the tree removal exercise on your own.

    Finding the number one tree removal services is however something that will take you a lot of time and effort. There is extra caution that is needed when it comes to finding the best tree removal services. Any error of hiring a tree removal service that is not competent enough may result in huge losses. Make sure that you adhere to a certain strategy when finding the best tree removal services.

    Checking on insurance needs to be the starting point whenever one is out there looking for the number one tree removal services. Whenever you are carrying out a tree removal job, one of the key aspects is insurance. Those tree removal services with insurance protection to cover their employees and your property are the best to hire.

    Never forget the need for one to check on licensing while out there looking for the number one tree removal services. You should seek to see by yourself the license documents of the tree removal service you want to choose. The benefit of selecting a licensed tree removal service is that they are tied by the regulations from the authorities.

    You will need to check deeply the capacity of the tree removal service in terms of tools and machinery. It is very essential that you consider selecting the tree removal services that have invested in state of the art tree removal tools and machinery. One of the benefits of choosing tree removal companies that have the latest machinery is that they are much faster in their job.

    When finding the top tree removal services, another thing worth checking is the aspect of cost. Ensure that you ask for quotations from the different tree removal services out there. Make an effort of always opting for budget friendly tree removal companies. Do not compromise on the quality of service because there are cheap tree removal services in the market.

    One of the guidelines that one needs to adhere to while finding the number one tree removal services is that of reading reviews. You may find these reviews from the websites of the tree removal services. One of the advantages of using testimonials is that they help you know the positives and the negatives of choosing a certain tree removal company.

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  • What Almost No One Knows About

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    November 26, 2020 /  Auto & Motor

    Knowing the Importance of Having the Best Tree Service Experts

    Trees are one of the things that have been a valuable part of the environment that we do have nowadays since we do all know that it plays a vital role for human. Giving you the shade from the scourging heat from the sun are indeed part of the great roles of these trees that we do have nowadays and you must take note also that they prevent flood which makes them vital for anyone of us. Cutting down these trees or trimming it would be a common decision that you may need to do nowadays since we do all know that it some circumstances it may cause harm to human which is why you need to cut or trim it down. To cut or trim these trees would surely mean that you may need the help of these tree service experts however some of us may be stubborn since they want to save up money and do it on their own. The advantages that you could gain from having these tree service experts do all the task for you are further given here for your sake to help you decide if you would need their services.

    Being safe from any danger is indeed the very first importance of having these tree service experts do all these things for you. Risk are indeed given to anyone of us nowadays whenever you do want to do these tree cutting or trimming since we do all know that you need the skills and experience in doing it all. Our life is indeed the best treasure that we do have nowadays which is why getting into risk just to cut or trim a tree would not be worth it for anyone of us.

    Fast and quality results are indeed given to us whenever we do have these tree service experts which is why it would truly be important for anyone of us to have them at your side in doing all of these things at all. Delays are indeed pretty crucial for many people nowadays however, having these tree service experts at your side would mean that you don’t need to worry about it for they could manage everything properly, and they do have the skills that you may need at all. On the other hand, quality results from these tree service experts is also given since they have great experience in doing all of these things unlike you do it by yourself which may rely on the knowledge from various sources.

    Last of all, another crucial advantage that you need to keep in mind why getting these tree service experts would be important is the fact that they all have the necessary equipment. Tree cutting or trimming is indeed complex and difficult task for us at all and that is why getting these equipment would surely help you in many ways then.

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  • Why No One Talks About Anymore

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    November 26, 2020 /  Internet Services

    All that One Need to Understand When Choosing Lawn Care Service

    Those services that help in maintaining of landscapes are referred to as lawn care service. Having a lawn around your home or business can help in enhancing the appearance. You must ensure that you have maintained the lawn. Getting the right lawn care service can be challenging and more time can be consumed. One must ensure that they check through some points when finding the best one in the area. It is wise for one to get the best lawn care service and reading these points make the whole process simple. The first point you should check when finding the best lawn care service around knows of a service that which has been in the field for many years. Also when you check on the time you can easily get the best that is familiar with all that which need to be done. You must ensure that you choose the most experienced lawn care service. You can get a good service that got all the necessary skills when choosing the best in the area.

    It is necessary that when you’re finding the best lawn care service you must check on the reputation. You must ensure that you check on the reputation for this can help one in getting the best one that has exceptional records. The service that has been offering great services to all clients is the best one in the area. You must ensure that you consider checking on the right service that which is more committed and dedicated in providing professional services around. One that is more committed and dedicated in providing great services is vital for one to get the best. You needed to select the best in the area that provide great services to clients and also charge good when looking for the right one. You must know of those lawn care services that you can afford whenever you want to get a good lawn care service around. Also checking on the charges is necessary for this help one in preparing a good budget.

    You should ensure that you ask more details from others whenever you want to get the best lawn care service in the area. You must ask others about lawn care services for it to help one in getting the best . It is wise for a person to ask from different people for many offers one with exceptional recommendations. You can know of a great service in the area if you ensure seeking more details from others. One need to search information on the internet sites when you ensure that you’re finding the right lawn care service around. Checking more details on various online platforms help one get the best that is highly rated on the search engine.

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  • Interesting Research on – Things You Probably Never Knew

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    November 26, 2020 /  Pets & Animals

    How to Know the Top Physical Therapist

    Seeking the assistance of a physical therapist is one of the best techniques that one may employ in order to reduce pain and improve on mobility. After an illness, injury, surgery or accident, physical therapy is one of the things that you should consider. It is cumbersome as well as time intensive for one to know the ideal physical therapist. Anytime you are out there looking for the leading physical therapist, there is a sequential criterion that one needs to use.

    One of the guidelines that one needs to adhere to while finding the best physical therapist is that of checking their location. The physical therapist found close to your home or place of work are the best to choose. Do not choose the physical therapist found in a place where you will incur extra transport costs.

    In the selection process of the number one physical therapist, one of the other guidelines that one needs to adhere to is that of checking the kind of experience. One of the methods that one may use to know the kind of experience held by the physical therapist is that of checking how long they have been around. You are advised to always settle for the physical therapist who has been around for a while. Experienced physical therapists have much better knowledge on dealing with the complex cases.

    Compatibility is one of the other criteria that one should use while finding the number one physical therapist. It is very important that you choose the physical therapist that you have a rapport with and the one that you can openly communicate with.

    One of the other factors that one needs to deeply think about while finding the number one physical therapist is cost. Before you make a final decision, ensure that you compare their rates. Those physical therapists with cost friendly rates are the best to settle for. The physical therapists who balance between affordability and quality are the best to settle for. You should also check what your insurance covers when choosing the best physical therapist.

    Checking on reputation is also key to the selection process of the number one physical therapist. The reading of reviews may assist you know the kind of reputation held by the physical therapist. Ensure that you settle for the physical therapists free from the baggage of past clients complaints. It is very important that you choose those physical therapists who have got good ratings from past clients. When choosing the top physical therapists, checking on credentials is also very vital. The best physical therapists to choose are the ones that have got the right knowledge and skills.

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