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Evgenij LegotskojJune 13, 2022, 4:15 a.m.

C++Leet Code Solutions - 003 - Longest Substring Without Repeating Characters

cpp, LeetCode, C++, C++17, string

Solution "Longest Substring Without Repeating Characters" on Leet Code

Evgenij LegotskojAug. 22, 2019, 2:42 a.m.

C++C ++ 17 - Lazy template functor with caching heavy function computation result

lambda, functor, C++17, auto

Developing the idea of caching the result of calculations of heavy functions , I propose to write a small template class, which will take the function as an argument, namely the lambda function, as the most universal an instrument within which a heavy function will be performed.

In this case, the result of the function will not be calculated at the time of creation of the Functor, but at the time of calling the operator parentheses () . And at the same time, the result will be cached. That will allow not to call a heavy function more than once as part of the execution of a method.

Evgenij LegotskojFeb. 26, 2019, 4:22 a.m.

C++Using SFINAE to specialize template methods, depending on the type of container std::map or std::vector, passed as an argument

SFINAE, C++17, template

There was a problem: "write the second implementation of the template function", in which the same arguments are passed. That is, the signature of both functions completely coincides. The difference is that, as an argument, the std::vector containers and the std::map containers can be passed to the function. And depending on whether std::vector is or std::map, this or that implementation should be selected.

In this case, the SFINAE rule will be used, which states: If the final types of arguments cannot be calculated (to perform substitution of template parameters) of an overloaded template function, the compiler does not throw an error, but searches for another suitable overload. The error will be in three cases:

  • No suitable overload was found.
  • Several such overloads were found, and C ++ cannot decide which one to take.
  • The overload was found, it turned out to be a template, and an error occurred when instantiating the template.

Our case will be the second. There are two overload template functions.

Evgenij LegotskojOct. 23, 2018, 5:11 a.m.

C++C++ 17 - [[fallthrough]] attribute

cpp, C++17, fallthrough

Start at work to use a compiler that supports the standard C++17.

Actively we begin to use various features from this standard..

I was pleased with the [[fallthrough]] attribute for switch case constructions.

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C ++ - Test 004. Pointers, Arrays and Loops

  • Result:10points,
  • Rating points-10
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C ++ - Test 004. Pointers, Arrays and Loops

  • Result:0points,
  • Rating points-10
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C ++ - Test 004. Pointers, Arrays and Loops

  • Result:50points,
  • Rating points-4
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Ds

Android and QML - Adding Splash Screen

Интересен формат иконки, если это png, то как решается проблема scalability? не растягивается ли лого на китайфонах с 1280х2500? У меня просто сплеш скрин с градиентом и логотипом, и вот несколь…
p

Qt/C++ - Lesson 023. Moving QGraphicsItem on QGraphicsScene with mouse help

FIGURE Abdominopelvic regions. Zjuaqd https://newfasttadalafil.com/ - Cialis Cialis Recommendations for preparing children and adolescents for invasive cardiac procedures a statement…
KG

How to use nested forms in Django

Спасибо за полезную статью. Подскажите пожалуйста, что делать если нужно реализовать большее количество вложенных форм? Например если на модель Address ссылается fk другой модели, на котору…

Qt/C++ - Lesson 051. QMediaPlayer – simple audio player

Не думаю, QMediaPlayer в один поток проигрывает. Если вам нужно одновременное воспроизведение нескольких аудиоисточников, то вам нужна Bass audio library , насколько знаю, её обычно и…
AG

Qt/C++ - Lesson 051. QMediaPlayer – simple audio player

есть такая вообще возможность ?
Now discuss on the forum
AB

Sorting the added QML elements in the ListModel

I am writing an alarm clock in QML, I am required to sort the alarms in ascending order (depending on the date or time (if there are several alarms on the same day). I've done the sorting …

Изменение поведения QGroupBox при клике на его чекбокс

Я вынес виджеты вынес за пределы QGroupBox в итоге.

QSqlRelatipnalTabelModel Qt 4.8.1 как получить id внешней связи?

Есть еще принципиально другой вариант решить раз и навсегда вопрос с полей id внешней связи. Это форкнуть Qt 4.8.1 QSqlTableModel, то есть создать свою ветку развития. Например создадим кл…

Добавление AndroidManifest.xml в cmake

Добрый день. Как добавить AndroidManifest.xml в cmake? Это не работвет set(ANDROID_PACKAGE_SOURCE_DIR ${PROJECT_SOURCE_DIR}/android CACHE INTERNAL "")set(ANDROID_BUID_DIR ${CMAKE_C…
s

Событие wheelEvent для виджета QLineEdit

вот что получилось: gui.py from PyQt5 import QtCore, QtGui, QtWidgets class LineEdit(QtWidgets.QLineEdit): def wheelEvent(self, event): #print("_") delta = 1 if e…
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