Posts by Maniero • 444,682 points
6,921 posts
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answer129
viewsA: Doubt how to display the name of a dictionary key
What you’re doing doesn’t make much sense. If you know what you want to print then you have no reason to do any different than what you did, except not use these keys. There are syntax errors in…
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answer66
viewsA: After compiling and running, the algorithm shows "recorded excess floating point", why?
The mistake there is that it is dividing by 0 since the condition of the for let it go to 0, then you should only compare if it is greater than zero and not equal. Actually there is no reason to buy…
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answer309
viewsA: Running time of an algorithm
Algorithm complexity is given by the amount of steps needed to perform something based on the number of items that need to be evaluated, which has been agreed to call n. Algorithm complexity is…
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answers108
viewsA: Line breaking problems and correctly display real value conversion on C#
Line breaker Put a WriteLine() Wherever you jump a line, so you have printed nothing but a line break, after all the method calls WriteLine. It is also possible \n in the text that is the character…
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answers727
viewsA: What is the difference between client-server and three-tiers?
Client-server The client-server is a two-tier model where it usually has a software component that interacts with the user or operates something in the most visible front of a system, while the…
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answers105
viewsA: More appropriate way to name a list
First, what you call an attribute is actually called a field. In general listaUfs is a form of hungarian notation and this is not usually considered appropriate. Probably only ufs is the best thing.…
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answer107
viewsA: Getvalue() does not show value that is assigned to the variable
Reflection is often abused, in rare cases it is really useful and has a great cost of performance, and only this should make you wonder if you should use, apart from the probable problem of…
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answers214
viewsA: Error: "Return should not be followed by an object expression"
There are some possible solutions. One of them is to take the res of return, so it conforms to the signature of the method that has a void and so must return nothing. Another solution would be to…
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answer102
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answer70
viewsA: What kind of data to accept any size?
If by dynamic you mean accept any size, the type VARCHAR is already what you want, and it allows you to specify a value from 1 up to 8000. If you do not specify anything the default is 8000 and not…
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answer184
viewsA: Error passing parameter to Sqlcommand by parameterizing table
The interpolation system SqlCommand only allows using variables in certain locations, the table name is not an allowed location. So the way would be to do with normal interpolation. But remember…
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answers224
viewsA: Save legacy data in C#
In this case you should not create a new DAO, after all you are using inheritance. One can even ask if you should have this inheritance because of liskov principle, but it depends on some factors we…
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answer224
viewsA: How do I play the variable within a text in "Messagebox.Show" of a "case" on the "switch" command?
I used interpolation to get what you want, and I took advantage and fixed another error making the validation of the input correctly preventing your application break, but need to improve the…
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answers185
viewsA: Where to place a function "toFixed()` to round up the value?
We don’t either because it depends on what you want to do. Programming has literally a plethora of possibilities and most of them can produce the expected result. The first step to be able to…
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answers469
viewsA: How do I make a comment in HTML?
Pycharm has nothing to do with it, he’s just an IDE. Read What is a programming language, IDE and compiler?. Each language has its syntax for comments and other things. In HTML is the <!-- to…
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answer141
viewsA: What are the differences between the implementations of the Set class on Dart?
I don’t know the specific implementations of Dart, I know what these structures are in general. Soen’s question linked little has to do with this because there is about maps and here about sets. It…
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answers279
viewsA: How does a black box test work?
The black box test is the easiest test there is because it does not depend on implementation details of how what is being tested works. To apply the black box test just know how to interact with the…
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answers314
viewsA: How do I know if I am programing procedurally in object orientation?
TL; DR To me if you’re not using the pillars of OOP you’re not doing OOP. And for me almost every project that says OO (not programming) in the background calls OO because it is fashionable. Some…
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answers2177
viewsA: Difference between a return and no return method
The non-return method is considered a procedure (Procedure), and the return method is considered function (Function). The most common is to use as a function and with parameter(s) because a method…
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answers653
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answer221
viewsA: Char array problem to find out if the input is vowel, consonant and uppercase or lowercase
There are some problems there, one of them is the use of the wrong function and the other is the fact that it has not created strings and yes arrays of charss without a terminator, so are not…
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answer55
viewsA: Crash C program when running
Are you declaring originalMoney and convertedMoney as char, so it has a 1 byte space reserved in each. Then you try for several bytes in it, this corrupts the memory and gives error. What you…
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answer137
viewsA: Doubt about closures, function inside loop
I will try to be very detailed because in comment was said by the AP that did not understand the initial explanation. And I’m going to explain why it actually happens, and I’m not going to say…
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answers66
viewsA: Cost of using exceptions with PHP and Valueobjects
This is worth much more for languages that care about performance, is not the case of PHP. If you want performance look for another language. We should never abuse exceptions for semantic reasons,…
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answer78
viewsA: How to rent plots matching the total?
You need to make the difference of the sum of the rounded plots to zero houses and add in the last installment. So you want to do two things, calculate all the plots without the decimals, and then…
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answer76
viewsA: Why doesn’t the matrix print out all the typed values?
I haven’t seen everything and it looks like the code isn’t even complete, but the biggest problem there is that it’s not reserving room for the matrix. See the line: int matriz_A[linha][coluna],…
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answer70
viewsA: Does the kivy use native resources?
Yes, it does, I don’t know if everyone, but it accesses what matters most. It is written in main page of the product (2nd. paragraph if the upper paragraph is to be taken as the heading).…
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answer28
viewsA: Compiling file . il (Intermediate Language) with admin permission
Compilation and permission have nothing to do with, who installs the software gives permission to what it can do, a created executable has no privilege property, so the question doesn’t even make…
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answer144
viewsA: Does Angular use the MVVM?
The framework actually uses MVVM in full or only a few principles? There are controversies, some people think it is more or less, others say something quite different and that it is a CBA (Compoente…
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answers911
viewsA: Fields with the same name in different tables
It can’t cause conflict, if you do everything right, which is what everybody does, right? When it comes to using the names on a query must have a complete qualification, i.e., the column name and…
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answers450
viewsA: How does the Flutter (Framework, SDK, Dart) architecture work?
Dart is a programming language then it is composed of, supposedly, a specification, one compiler, and a library basic standard, plus a Runtime which can be considered part of this library (plus),…
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answer327
viewsA: What does the "MZ" listed at the beginning of executable code mean?
It is an executable signature. It is a simple and naive way to check if the executable is in a given format. If everything is right works, but it can be something forged or coincident, it is…
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answer109
viewsA: Open new tab in Firefox and Edge with JS
It depends on what you want to do. If you look at documentation of the method open() of the object window you will see that it has 3 parameters, and 2 of them are mandatory, and you are not passing…
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answers165
viewsA: How does a const constructor differ from a standard constructor?
Reading the answers linked it seems that not even they understood very well for what it serves :) But the conclusion is that, roughly speaking, it functions as a named tuple. It serves for you to…
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answers64
viewsA: How to create some kind of "dynamic index" in the database
No need and no such thing as "dynamic index", all indexes are dynamic by nature, they are updated when you have information that affects you. What you need to do is change the table, the way you…
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answer1183
viewsA: When to use "map()" or "toList()" methods?
I will try to answer the question in a general way and indicating what is most important, even if it does not give a specific solution to the problem, after all the resource is being used in a wrong…
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answers776
viewsA: Use of length to count concatenated strings
TL; DR It is unlikely that you need a method that gives the size of a full name without creating this full name, so this method makes no sense (I’m speculating, I don’t know details of the problem),…
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answers192
viewsA: Am I required to set the size of a Linkedlist in Java?
This is very confusing, uses terms that probably only you know what it means. A linked list is still a list, you can insert new elements into it at the beginning, at the end and in the middle, as in…
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answers213
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answers226
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answer70
viewsA: Passing parameters using primitives or an object containing the fields?
Once again I repeat here at SOPT: there is no better option, no good practice, there is the most appropriate in the specific case. Good practice is the crutch that people use to follow cake recipe…
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answers482
viewsA: When is it recommended to Initialize a final property in the Class constructor?
The second is syntax sugar of the first, and in fact the second parameter of the first is still a syntax sugar and will occur with it the same as with the other parameter. This syntax placing the…
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answer779
viewsA: Database normalization in HR system
I will reply in a general way, but take note of the comment I made above. I was writing and the question changed (the version I replied to), then the answer may seem meaningless. The current model…
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answer401
viewsA: Is it possible to access the address of a C function?
Every function is an implicit pointer, so your name is already your address, just print your content as a pointer (%p) which is the address. Unlike people who imagine these names all called…
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answer209
viewsA: Is there a thread, pipeline and core relationship?
The question is (or was) a little vague, but I would say that there is no relation between these concepts, at least not with these terms. Pipeline is something internal to the processor, generally…
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answer89
viewsA: How to loop with invalid object message?
Do not make use of the do-while, Make an infinite loop and make a decision within whether or not you will continue within the loop according to the established condition, so you can do what you…
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answer681
viewsA: Differences between using XML or JSON
XML is far from having died, still has an absurdity of things in XML, including there its variations as XAML just to cite one example (there are several others with similar purpose), many…
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answer80
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answer691
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answer199
viewsA: What is the difference between parameters and attributes when creating tables in a system?
Vixi, you’re mixing three things in there and it really gets messy. In databases, and even in UML, attribute is the term used, in programming languages such as C# no, the correct term is field, or…