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23
votes2
answers6460
viewsWhat is the difference between a programmer and a software engineer?
I am aware that the site already has the questions What’s the difference between architecture and software engineering? and What is the difference between architecture, engineering, science,…
terminology software-engineering software-architecture computer-scienceasked 7 years, 8 months ago Marcus Nunes 17,915 -
23
votes3
answers478
viewsCan Garbage Collector language be used for games?
I started learning C# and even Java for interest in game development. But I know that many are developed with C++, mainly because I don’t have one Garbage Collector. Of course I know that several…
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23
votes2
answers7627
viewsWhat is the difference between Javascript and jQuery?
Think about the Jquery as a Framework JavaScript in order to optimize writing, the Ajax is a good example. In addition to easier writing, there is a difference between the two? What are the…
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23
votes2
answers9761
viewsWhat is an overhead?
I see that term used a lot when it comes to the excessive use of memory, but I don’t know in depth if that’s really it. I noticed that here on the site this term was used in some questions: The size…
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23
votes3
answers4443
viewsWhat are the main differences between Angular, React and Vue.js?
On a project SPA which will soon be used also in a mobile app, I need to know the main differences to decide which one framework should I specialize.
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23
votes5
answers13505
viewsDifference between Object and Instance
Object-oriented programming is often spoken of in both class and object instances. Seeking the meaning of each one, I realized that now the concepts are unified and the same are treated as synonyms,…
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23
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answers6299
viewsWhat defines a stable sorting algorithm?
It is known that there are several ways to sort the data of a collection, some examples are the famous Bubble Sort, Insertion Sort and Selection Sort. I heard some algorithms are stable and others…
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23
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answers572
viewsWhat is a devops?
I would like to know that it is "devops" in practice. I would sincerely like to know an experience rather than a formal definition.
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23
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answer9539
viewsWhat is the difference between "calloc()" and "malloc()"?
What the function calloc() makes the malloc() Doesn’t it? Why is it hardly used?
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23
votes1
answer433
viewsTransponders in Ecmascript
What are the allowed characters, or what is allowed, within a name (known as "identifier") in the Ecmascript 6? Has rules between identifiers and keywords???…
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23
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answers8678
viewsWhat is NPM and Node?
The title of the question says it all. There are many articles about it, but in a clear and beginner way, what is NPM and what does it do? Like Node? What they contribute to the construction of…
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23
votes2
answers885
viewsTo what extent should I follow the conventions, where can I apply specific style patterns of my own?
How far should I follow the conventions in Java codes, that is, how far the convention is a rule? I can develop and apply my own styles of coding patterns in my code, knowing that I will use this…
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23
votes3
answers6210
viewsWhat is the purpose of the symbol :: in Java?
I implemented a method that sums all the numbers in a list of the kind List<Integer> as follows: int soma = 0; for (Integer num : numeros) soma += num; return soma; However, the Netbeans IDE…
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answer46824
viewsWhat’s different from Xampp, Wamp, Easyphp, Zwamp and PHP?
What a difference from Xampp, Wamp, Easyphp, Zwamp and PHP? They are all servers? Are all official PHP?
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23
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answers2921
viewsWhat does the "=>" operator mean?
I was seeing some solutions in Javascript and in one case I saw this command line: return args.reduce((s, v) => s + v, 0);. But I don’t know what the operator means =>. What is his function?…
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23
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answers2385
viewsHow important is the use of the word "this"?
What is the real use of using the reserved word this? As far as I can see it makes use or not, but I doubt its functionality.
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23
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answers368
viewsHow do I do SEO?
I started a blog not long ago, but long enough to have visits, 2 months ago, but I don’t have any! And I’ve written 10 articles! They told me I had to invest in the site’s SEO unless I wanted to pay…
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23
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answers27855
viewsWhat do Rewritecond and Rewriterule mean in a . htaccess file?
I know they are used for many purposes, either internal or external redirection, but I never understood what each one does, whenever I need something I have to resort to ready scripts because I do…
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23
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answers2818
viewsWhat is "Inversion of Dependency Principle" (DIP)?
I’m getting to know the beginning now SOLID: S Single Responsabilty Principle The Open/Closed L Liskov Substitution Principle I Interface Segregation D Dependency Inversion Principle However I could…
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23
votes3
answers11214
viewsWhat is Code Smell?
I started to study swift and I stumbled across a widely used term called Code Smell from what I could understand in Wikipedia and on some other sites it is any symptom in the source code that…
terminologyasked 9 years, 2 months ago Gabriel Rodrigues 15,969 -
23
votes1
answer975
viewsWhat is an SVG?
Nowadays, we talk about image quality and always linked to this type of statement every now and again, this mysterious acronym appears. It seems to be SVG something really amazing, they say that…
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answers418
viewsIs it bad practice to use empty interfaces?
I have heard comments that it would be a good idea, when a future implementation can take place. Also heard that it is a bad practice. I know that in PHP, for example, there is an interface called…
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23
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answers8037
viewsArraylist x List
What is the difference of declaring ArrayList and List for lists in Java? What are the advantages of using one or the other?
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23
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answers3572
viewsHow can I distribute the . py program without the user having to install all libraries?
I’m learning Python and I need to distribute a program, I read about cx_Freeze and py2exe to generate one .exe. However, I don’t mind distributing the program code together, so I don’t see the need…
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23
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answers1923
viewsWhat is a microservice architecture?
I read that "microservice-based architecture" basically makes system requirements specific and independent services. In this article, right after the definitions says that it is possible to separate…
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23
votes4
answers23311
viewsForce Javascript File Update Without Disabling Cache
In a large-scale web application I develop there is a disorder every time updates happen, because browsers, especially Google Chrome, do cache of Javascript files and, sometimes, incompatibilities…
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23
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answers3644
viewsWhat is the use of using?
My question is about the difference between: //Bloco 1 using (var memoryStream = new MemoryStream()) { //código } //Bloco 2 { var memoryStream = new MemoryStream(); //código } Deep down they seem to…
c#asked 9 years, 8 months ago Felipe Avelar 9,507 -
23
votes3
answers627
viewsOptimize Java method using the Scopes concept
Well some time ago, when I took some classes J2ME to Mobile (almost deceased ), where I was presented to a concept of scope hitherto unknown by me, that would be: { // cria um novo escopo } Where…
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votes8
answers44013
viewsHow to remove auto complete input from google Chrome?
I want to remove yellow background when this enabled auto complete from Google Chrome. I tried to disable auto complete by applying: autocomplete="off" and I was unsuccessful. The top image is the…
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23
votes6
answers15200
viewsWhat is and how does Bootstrap work?
I did some research, but most of the articles I found are based on the assumption that the reader already has some familiarity with frameworks (which is not my case), that I still have only a vague…
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23
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answers268
viewsNull attributes on an object is Bad?
I have an object that has 7 attributes: 2 attributes are always with some value assigned. 3 values are always set if a filter query is required (3 attributes are filters). The last 2 attributes are…
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23
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answers8570
viewsGet "waves" from sound or music frequency
How do I display the sound waves of any sound (music)? I don’t know if it is possible to get this with JS or some other language. Waves of this type: An example is as Soundcloud does, displaying a…
javascriptasked 9 years, 9 months ago Leandro Macedo 1,143 -
23
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answers4023
viewsCan it be considered a bad modeling practice to store all people (customers, employees, suppliers) in the same table?
I am trying to design a database for a small project but I am having difficulties regarding the normalization of the tables of persons (physical and legal): Client Supplier Professional I thought…
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23
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answers4157
viewsWhat are <head> meta tags and what are they for?
What are the meta tags contained in <head>? What they are and what they serve and what are the pros and cons of using them? Example: <meta charset="UTF-8"> <meta name="description"…
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23
votes3
answers2439
viewsWhat is the real advantage of using a Callback and what is thread/multithread?
There is a lot of explanation of what callback is on the net and even a few scant examples, but nothing that explains in practice and in detail a really important use (I did not find). I already…
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23
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answers1963
viewsWhat is the purpose of the free() function?
In which cases should it be used? There is an alternative? It is recommended to use?
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23
votes2
answers2433
viewsWhat is Javascript Prototype?
I see in various instances of native objects a '.protoype' in the middle before a method or attribute but I don’t know what they are EXACTLY. The only thing I know is that it’s Javascript’s way of…
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23
votes3
answers59486
viewsHow to compare dates in PHP?
I would like to know which function I use to compare two dates and return to larger. I have a form for HR registration in which the user will register their professional experiences and the date of…
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23
votes1
answer2914
viewsIndexes in Mysql queries
Using indexes in mysql queries really makes the result come quickly for some large queries or tables. For example in the query below: SELECT * FROM table WHERE status = 1; For a table with 1 million…
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23
votes5
answers2310
viewsWhy are other encodings used besides UTF-8?
If UTF-8 encoding can represent all Unicode characters, why are there still applications that adopt other encoding standards such as ANSI? It would not be easier to abandon all those that do not…
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23
votes1
answer15547
viewsHow is 'super' used in Python classes and what is it used for?
How to use and for what purpose super in classes Python?
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23
votes1
answer1280
viewsDifferences between declarative and imperative form of LINQ
What one way can do that the other can’t? There is a difference in performance? There’s one advantage over the other? Example: using System; using System.Collections.Generic; using System.Linq;…
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23
votes5
answers573
viewsWhy are you wearing shorts?
The guy short corresponds to a 16-bit integer - it is literally syntactic sugar for type Int16. The current processors are all 64 bits, even on the most machines low-end. Some older machines still…
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23
votes3
answers8791
viewsWhat is the difference between checked (checked) and unchecked (unchecked) exceptions?
Hello! I have some questions about exceptions, which are they: What is the main difference between checked and unchecked exceptions? In which situations should I use each of them? What are good…
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23
votes2
answers29551
viewsSimple paging in jQuery/Javascript
I’m looking for a simple pagination, no CSS styles, nothing like that. Only with the buttons below to change page and with the elements on top. I’m asking because the examples I find are a little…
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23
votes4
answers3497
viewsCapture the values of JSON that is Online
My problem: I need to read a JSON that is in a certain URL. I tried the following code, but it doesn’t work: JSONObject jsonObjeto; JSONParser parser = new JSONParser(); URL url = new…
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23
votes3
answers1636
viewsHow to create a conditional index in Mysql?
How to create an index filtered by a specific data range? As far as I know, it is impossible to do this directly in Mysql. In some other database systems, there is usually a WHERE clause for this…
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23
votes2
answers28027
viewsIs there any way to enable full screen browser with Javascript?
I note that the main browsers are in full screen mode when pressing the F11 key, this is a functionality of the browser itself or it is possible to activate it through some Javascript code? If you…
javascriptasked 11 years ago Joao Paulo 11,760 -
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votes6
answers28585
viewsHow to get Timestamp in Javascript?
I’d like to know how I do in JavaScript to obtain the Timestamp? A number that represents the current date and time. I know we got the object for date and time through: var d = new Date(); But I…
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22
votes5
answers1841
viewsWhy are there so many programming languages?
Several decades ago, programming languages emerged to make life easier for programmers and indirectly, for the general public as well. In the beginning, everything was done with buttons that…
language-independentasked 5 years, 3 months ago NinjaTroll 1,752