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Изходен канал @clockstackwheels · Post #296 · 11.04

Паттерн Декоратор — специальный способ организации модулей в программе, который позволяет подставить какую-то новую функцию прямо в середину цепочки вызовов, тем самым чуть-чуть подкорректировав поведение. Например, в реальном мире очки для чтения это декоратор. Вы ставите их между вашими глазами и текстом. Глобально взаимодействие ваших глаз и текста не меняется: отражённые световые лучи от страницы книги попадают в ваши зрачки, что с очками, что без них. Но очки располагаются посередине: они принимают лучи на вход и преломляют их, передавая дальше вам в глаза уже изменёнными. Важной особенностью является тот факт, что очки можно снять. Они не требуют ни модификации вашего тела, ни модификации книги. Вообще никакие условия не нужны, кроме наличия самих очков. А если вы в линзах, то внешний наблюдатель может даже этого не знать. Класс-декоратор должен быть спроектирован так, чтобы не требовать никаких изменений в объектах, с которыми он работает. Его можно отключить, чаще всего буквально закомментировав одну строку. В примере ниже программа выведет текст "Привет, мир, в натуре.", и вот это дополнение в конце как раз дописано декоратором. Можно убрать или закомментировать подчёркнутую строчку, не трогая остальной код, для всех внешних вызовов сигнатуры останутся теми же самыми, но выводиться будет уже просто "Привет, мир". В декораторы можно прятать логику, которую буквально навешивают поверх основной функции программы. Например, проверку прав на выполнение операции. Перевод на другой язык, логирование, поддержку обратной совместимости при обновлении и так далее. #dev

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Намерени 16 подобни публикации

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Interesting Planet 🌍

@interesting_planet_facts · Post #1153 · 22.12.2025 г., 12:11

🌎 The African buffalo, also known as Cape buffalo, is responsible for more deaths in Africa than most other large animals. Adult males can weigh up to 900 kilograms and have powerful horns, making them extremely dangerous when threatened. Herds can number in the hundreds and will defend injured members against predators, including humans. ✨ #wildlife⚡#mammals⚡#danger 👉subscribe Interesting Planet 👉more Channels ​

Interesting Planet 🌍

@interesting_planet_facts · Post #1096 · 03.12.2025 г., 18:11

🌎 Mosquitoes are responsible for more human deaths than any other animal on Earth. They transmit diseases like malaria, dengue, Zika, and yellow fever, causing over 700,000 deaths each year worldwide. Some mosquito species can breed in just a bottle cap of water. ✨ #animals⚡#danger⚡#mosquitoes 👉subscribe Interesting Planet 👉more Channels ​

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@interesting_planet_facts · Post #1026 · 12.11.2025 г., 18:11

🌎 The assassin bug, found in tropical and subtropical regions, can inject a powerful enzyme that liquefies the insides of prey. Some species can also deliver painful bites to humans that may trigger allergic reactions. Assassin bugs are responsible for transmitting Chagas disease, which affects millions in Central and South America each year. ✨ #animals⚡#danger⚡#bites 👉subscribe Interesting Planet 👉more Channels ​

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@interesting_planet_facts · Post #721 · 10.09.2025 г., 03:22

🌎 The mosquito is considered the deadliest animal on Earth, causing over 700,000 human deaths each year. Mosquitoes spread malaria, dengue, Zika, yellow fever, and other life-threatening diseases across tropical and subtropical regions, making them a major global health threat. ✨ #animals⚡#danger⚡#diseases 👉subscribe Interesting Planet ​

Universe Mysteries 🪐

@cosmomyst · Post #153 · 18.08.2025 г., 20:11

🪐 The asteroid (137108) 1999 AN10 is an Apollo-type near-Earth object roughly 800 meters wide, and its orbit brings it close enough to Earth every few decades that scientists label it as potentially hazardous. Current calculations predict an especially close approach in 2027, when it will pass within about 390,000 kilometers—almost the same distance as the Moon—making it one of the larger asteroids to come so near our planet in the 21st century. ✨ #asteroids⚡#danger⚡#nearEarth⚡#nasa⚡#galaxy⚡#stars⚡#astronomy⚡#universe⚡#cosmos⚡#space 👉subscribe Universe Mysteries

Interesting Planet 🌍

@interesting_planet_facts · Post #1065 · 23.11.2025 г., 18:11

🌎 Saltwater crocodiles are among the most dangerous animals on Earth. These massive reptiles can exceed 6 meters in length and have the strongest recorded bite force of any living animal—over 16,000 newtons. Saltwater crocodiles are responsible for hundreds of attacks on humans annually throughout Southeast Asia and northern Australia. ✨ #crocodile⚡#danger⚡#reptiles 👉subscribe Interesting Planet 👉more Channels ​

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@interesting_planet_facts · Post #787 · 20.09.2025 г., 15:11

🌎 Hippos are among the most dangerous large animals in Africa, causing more human deaths annually than lions. Territorial males can attack boats and move surprisingly fast on land, reaching speeds of up to 30 kilometers per hour. ✨ #hippo⚡#wildlife⚡#danger 👉subscribe Interesting Planet ​

Universe Mysteries 🪐

@cosmomyst · Post #136 · 15.08.2025 г., 13:11

🪐 The asteroid (7335) 1989 JA is classified as a "potentially hazardous asteroid" because it's over 1.8 kilometers wide and its orbit brings it close enough to Earth to be watched carefully by astronomers. In 2022, it made a safe pass at about 4 million kilometers from our planet, but its great size means that any future close approach will always be closely monitored for any change in its path. ✨ #asteroids⚡#danger⚡#nearearthobjects⚡#nasa⚡#galaxy⚡#stars⚡#astronomy⚡#universe⚡#cosmos⚡#space 👉subscribe Universe Mysteries

Interesting Planet 🌍

@interesting_planet_facts · Post #916 · 16.10.2025 г., 12:11

🌎 The freshwater African Nile crocodile holds a notorious reputation as one of Earth's most dangerous animals, responsible for hundreds of human fatalities yearly. Adult males can reach up to 5 meters in length and exert a bite force exceeding 16,000 newtons—one of the strongest in the animal kingdom. ✨ #crocodile⚡#danger⚡#predators 👉subscribe Interesting Planet 👉more Channels ​

Interesting Planet 🌍

@interesting_planet_facts · Post #686 · 04.09.2025 г., 13:22

🌎 Saltwater crocodiles are Earth's largest living reptiles and among the most dangerous animals, capable of ambushing and killing prey as large as water buffalo. Adult males can grow over 6 meters long and weigh up to 1,000 kilograms. ✨ #crocodile⚡#predators⚡#danger 👉subscribe Interesting Planet ​

Universe Mysteries 🪐

@cosmomyst · Post #124 · 13.08.2025 г., 00:11

🪐 On June 30, 1908, a small asteroid or comet exploded over Tunguska, Siberia, flattening 2,000 square kilometers of forest in an instant. Known as the Tunguska event, this airburst was caused by an object about 50–60 meters wide—large enough to release energy more powerful than the largest nuclear bomb ever detonated, yet leaving no impact crater. ✨ #asteroids⚡#danger⚡#Tunguska⚡#nasa⚡#galaxy⚡#stars⚡#astronomy⚡#universe⚡#cosmos⚡#space 👉subscribe Universe Mysteries

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