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Изходен канал @clockstackwheels · Post #236 · 28.02

Сопоставление с образцом (pattern matching) — сильный механизм языков программирования, который, к сожалению, встречается не так часто. Причём, как в коде разработчиков, так и в поддержке со стороны самого языка. Разработчики на функциональных языках используют этот механизм довольно часто, потому что у них вообще многое определяется статически через правильный подход к системе типов. Разработчики же на императивных языках очень любят огромные многоуровневые ветвления. Есть даже такое понятие «Спагетти-код» — раньше его применяли к коду, перегруженному операторами перехода, но в современном виде это скорее об избытке операторов условия. Pattern matching позволяет накладывать на объекты некоторый трафарет и смотреть, попадают ли они под него. Это не только выглядит лаконичнее и короче, чем дерево условий, но ещё и понятнее с точки зрения восприятия человеком: вот у нас заказ содержит более 10 элементов и при этом стоит более 1000 долларов, значит делаем на него скидку 10 центов. При этом трафарет работает как сортировщик монеток: самая маленькая проваливается в первый паз, следующая по размеру в следующий итд, применение условий идёт сверху вниз. Есть и неявный плюс: такой подход автоматически провоцирует разработчиков проводить проверку на null. Ведь null не может подходить под трафарет «содержит более 10 товаров». К счастью, в C# этот механизм в последних версиях активно развивают и совершенствуют. И это одно из многочисленных преимуществ C# над Java. #dev

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Намерени 37 подобни публикации

Търсене: #peru

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POPULAR FRONT

@popularxfront · Post #6148 · 03.05.2026 г., 19:48

🇵🇪#Peru: Former Senate candidate Jorge Luis Alcalde Alfaro was assassinated by a hitman in broad daylight in Trujillo three days ago. He was about to enter his car when another vehicle pulled up and opened fire. He later died on the way to the hospital. (📹 via @cartelwatchnet on X & Caretas.pe)

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Voyage.Travel.Tourism

@VOYAGE · Post #1537 · 21.08.2025 г., 12:14

🗺 Peru 🇵🇪 🟠It turns out you can ski not only on snow but also on sand. Such skiing takes place in the Ica Desert in Peru! This is called sandboarding. 📏 📏 📏 📏 📏 📏 📏 📏 #Peru | @voyage

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Voyage.Travel.Tourism

@VOYAGE · Post #1442 · 05.06.2025 г., 12:14

🗺 Peru 🇵🇪 🟠It turns out you can ski not only on snow but also on sand. Such skiing takes place in the Ica Desert in Peru! This is called sandboarding 📏 📏 📏 📏 📏 📏 📏 📏 #Peru🇵🇪@voyage

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Voyage.Travel.Tourism

@VOYAGE · Post #1282 · 02.02.2025 г., 13:14

🗺 Peru 🇵🇪 📏 📏 📏 📏 📏 📏 📏 📏 🟠It turns out you can ski not only on snow but also on sand. Such skiing takes place in the Ica Desert in Peru! 📏 📏 📏 📏 📏 📏 📏 📏 This is called sandboarding. 📏 📏 📏 📏 📏 📏 📏 📏 #Peru🇵🇪@voyage

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Voyage.Travel.Tourism

@VOYAGE · Post #987 · 20.06.2024 г., 12:14

🗺 Peru 🇵🇪 It turns out you can ski not only on snow but also on sand. Such skiing takes place in the Ica Desert in Peru! This is called sandboarding. #Peru @voyage

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Voyage.Travel.Tourism

@VOYAGE · Post #662 · 27.12.2023 г., 06:01

Peru🇵🇪 Impressive natural masterpiece - the Rainbow Mountains in the Cusco region. ⛰🌈 The colorful layers of these mountains were formed millions of years ago from red sandstone, which, under the influence of climatic conditions, underground water, and mineral impurities, became stained with yellow, green, white, and other colors. #Peru @voyage

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Voyage.Travel.Tourism

@VOYAGE · Post #542 · 27.11.2023 г., 13:04

Peru🇵🇪 A walk with a magnificent view of Machu Picchu. Machu Picchu is a legendary city nestled in the heart of the Andes at an altitude of 2400 meters. It is an ancient Inca settlement located between two mountain peaks. 🏔 When tourists gaze at the ruins of the city of Machu Picchu, which stand out dramatically among the jungle-covered mountain peaks and steep slopes, and the terraces descending into the valley, their breath is taken away. #Peru @voyage

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RTDocumentary

@rtdocumentary · Post #328 · 28.11.2021 г., 10:01

The right to die #video#Peru Ana Estrada is confined to bed most of the time and can breathe only with a respirator. She lives with polymyositis, a rare muscle disease with no cure. Since 2016, Ana has been writing a blog called ‘Ana seeks a dignified death’. In addition, she started a legal battle to decide to end her life ‘when the time comes’. Assisted death is illegal in her country of Peru. Peru is primarily a Catholic country, where euthanasia is prohibited alongside same-sex marriage and abortion. However, in 2021 a court ruled in favour of Ana and cleared anyone assisting in her death of criminal charges. Ana says she would decide to die when she could no longer write her blog. On this day in 2000, the Dutch lower house of parliament voted to legalise euthanasia. Thus, the Netherlands became the first country that allowed mercy killings. Euthanasia is also legal in Spain, Belgium, Luxembourg, Canada and Colombia. Follow: https://t.me/rtdocumentary

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RTDocumentary

@rtdocumentary · Post #209 · 12.09.2021 г., 10:10

#video#Peru Hundreds of thousands of Peruvian women were forcibly sterilised between 1996-2000 as part of President Alberto Fujimori’s family planning programme. The initiative was launched to reduce poverty and cut birth rates among the poor. While it was supposed to be consensual, women involved in the programme say otherwise. Most of the victims came from poor indigenous communities. Josefa was at home when nurses came and forced her to go to the hospital. She still recalls waking up after the procedure and seeing other women crying out their husbands’ names in pain. In the following years, Josefa suffered from infections and cancer. Decades later, Josefa and others are still seeking justice through a class action suit against the ex-president. Follow: https://t.me/rtdocumentary

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El Gourmet Urbano

@gourmeturbano · Post #20608 · 02.08.2025 г., 14:24

#GASTRONOMIA#VENEZUELA#PERU👩🏻‍🍳🧑🏻‍🍳👨🏻‍🍳 | Chef venezolano triunfa con restaurante peruano en su país: "Necesitaba de la gastronomía de Perú" https://ift.tt/YdZC8u1 August 02, 2025 at 09:15AM

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