TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #411 · 9 фев.
reload_flag="" if [[ -n "${DEBUG}" ]]; then reload_flag="--reload" fi if [[ -n "${WORKER_COUNT}" ]]; then workers=${WORKER_COUNT} else workers=2 fi gunicorn --workers ${workers} \ --bind 0.0.0.0:8000 \ ${reload_flag} main.wsgi Писали такие конструкции чтобы проверить наличие флага и сформировать команду правильно? На самом деле можно сделать тоже самое проще. Для этого используются операторы условной подстановки, доступные в оболочках семейства POSIX. :- для установки значений по умолчанию ${WORKER_COUNT:-2} Если переменная не объявлена, то будет дефолтное значение 2. :+ подставляет указанный текст, если переменная не пуста ${DEBUG:+--reload} Если что-то есть в переменной то распечатается текст после символа +, в противном случае - ничего. Удобно для опциональных флагов, как в нашем примере. Итого наш скрипт может выглядеть так: gunicorn --workers ${WORKER_COUNT:-2} \ --bind 0.0.0.0:8000 \ ${DEBUG:+--reload} main.wsgi Есть еще два оператора. := не только подставить дефолтное значение, но и присвоить его переменной, если она пуста # никаких переменных еще нет VAL1=${VAL2:=hello} # теперь доступны обе echo $VAL1 $VAL2 # hello hello :? остановить выполнение с ошибкой, если переменной нет. echo ${MISS:?is required} bash: MISS: is required Код выхода будет 1. #tricks#linux
Пребарај: #oceans
@interesting_planet_facts · Post #1028 · 13.11.2025 г., 12:11
🌎 Symbiosis between clownfish and sea anemones is a classic example of cooperation in nature. Clownfish live among anemone tentacles for protection, while their movements help ventilate and clean the anemone. Clownfish secrete mucus that prevents the anemone’s stings from harming them. ✨ #biology⚡#oceans⚡#animals 👉subscribe Interesting Planet 👉more Channels
@interesting_planet_facts · Post #932 · 18.10.2025 г., 22:11
🌎 Ocean-based carbon removal technologies are being piloted to fight climate change. Examples include spreading crushed minerals in seawater or using seaweed farms to absorb CO2. One experiment off Canada’s coast aims to capture and store up to 20,000 tons of CO2 per year. ✨ #climate⚡#oceans⚡#technology 👉subscribe Interesting Planet 👉more Channels
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@interesting_planet_facts · Post #752 · 15.09.2025 г., 00:22
🌎 Box jellyfish, found in tropical oceans, have venom so deadly it can stop a human heart within minutes. Their nearly invisible tentacles can reach up to 3 meters long and are packed with thousands of stinging cells. ✨ #animals⚡#venom⚡#oceans 👉subscribe Interesting Planet
@amazingeo · Post #608 · 02.02.2026 г., 12:31
🌍 Asia is the largest continent, but the Pacific Ocean is even bigger—its area almost doubles that of all land in Asia, making it Earth’s vastest single geographic feature. ✨ #continents⚡#oceans⚡#earth⚡#geography⚡#nature 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #387 · 18.10.2025 г., 15:31
🌍 The Pacific Ocean is wider than the entire Moon. At its widest, it stretches over 19,000 kilometers from Asia to the Americas—more than the Moon’s diameter of 3,474 kilometers. ✨ #continents⚡#oceans⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #261 · 18.09.2025 г., 20:12
🌍 Earth’s surface area is about 510 million square kilometers—more than 70% is covered by oceans, making our home a true water planet among the rocky worlds of our Solar System. ✨ #Earth⚡#oceans⚡#planet⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #155 · 01.09.2025 г., 09:12
🌍 The Southern Ocean, officially recognized in 2021, surrounds Antarctica and connects the Atlantic, Pacific, and Indian Oceans, forming a unique ring of cold currents that help regulate Earth’s climate. ✨ #continents⚡#oceans⚡#climate⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #345 · 07.10.2025 г., 20:31
🌍 Earth’s mountain-building processes are still active—over 80% of volcanoes erupt near tectonic plate boundaries, constantly creating new land and even islands in the world’s oceans. ✨ #geology⚡#volcanoes⚡#oceans⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #692 · 16.04.2026 г., 20:31
🌍 The Atlantic Ocean is growing wider each year as the Americas slowly drift apart from Europe and Africa, adding about 2.5 centimeters annually—roughly the speed fingernails grow. ✨ #continents⚡#oceans⚡#tectonics⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #348 · 08.10.2025 г., 18:31
🌍 The Eurasian and North American continents are moving apart by about 2.5 centimeters every year along the Mid-Atlantic Ridge, slowly widening the Atlantic Ocean over millions of years. ✨ #continents⚡#oceans⚡#tectonics⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #462 · 18.11.2025 г., 20:31
🌍 Antarctica is the only continent entirely surrounded by ocean and is nearly twice the size of Australia. Its thick ice reflects sunlight, helping regulate Earth’s overall temperature. ✨ #continents⚡#oceans⚡#Antarctica⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #238 · 15.09.2025 г., 00:12
🌍 Salt marshes along coastlines act as natural buffers, soaking up floodwaters and trapping sediment. These unique habitats store carbon more efficiently than most forests. ✨ #coastline⚡#wetlands⚡#oceans⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍