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: #adaptation
@amazingeo · Post #622 · 09.02.2026 г., 12:31
🌍 Some rainforest insects mimic leaves so perfectly they even show “bite marks” or rot spots on their bodies, hiding from predators in the dense, shadowy understory. ✨ #rainforest⚡#biodiversity⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #528 · 21.12.2025 г., 20:31
🌍 Terraced vineyards on Portugal's Douro River show how people reshape steep hillsides for farming. Ancient stone walls protect soil from erosion while letting grape vines thrive in harsh terrain. ✨ #agriculture⚡#landscape⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #17 · 10.08.2025 г., 10:26
🌍 Terraced rice fields in Southeast Asia transform steep hillsides into farmable land, reducing soil erosion and creating unique landscapes shaped by both nature and human ingenuity. ✨ #agriculture⚡#landscape⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@interesting_planet_facts · Post #987 · 29.10.2025 г., 18:11
🌎 The male seahorse is the only animal where the male becomes pregnant, carrying fertilized eggs in a special pouch until they hatch. Seahorses can give birth to hundreds of fully formed young at a time—up to 2,000 in a single brood. ✨ #adaptation⚡#animals⚡#ocean 👉subscribe Interesting Planet 👉more Channels
Hashtags
@amazingeo · Post #547 · 31.12.2025 г., 12:31
🌍 In tundra landscapes, some mosses and lichens can survive temperatures below –50°C and continue to photosynthesize under snow, making them some of the Earth’s hardiest plants. ✨ #tundra⚡#permafrost⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #310 · 29.09.2025 г., 12:31
🌍 The Galápagos Islands are home to the only marine iguanas on Earth. These unique lizards swim and dive in the Pacific Ocean, making them the world’s only sea-going reptiles. ✨ #islands⚡#wildlife⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #24 · 10.08.2025 г., 13:59
🌍 Urban green roofs, where buildings are topped with plants, help cities manage rainwater, reduce heat, and provide habitats for birds and insects, blending urban life with nature. ✨ #cities⚡#environment⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #509 · 12.12.2025 г., 12:31
🌍 In tropical rainforests, some plant leaves grow waxy surfaces and pointed tips called "drip tips." These features help water run off quickly, stopping mold and fungi in the damp climate. ✨ #rainforest⚡#tropics⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #120 · 26.08.2025 г., 13:12
🌍 Earth’s climate zones are not just about temperature—they also shape which plants and animals can survive. Some cacti thrive in deserts, while rainforests burst with life in tropical zones. ✨ #climate⚡#vegetation⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@interesting_planet_facts · Post #539 · 11.08.2025 г., 03:22
🌎 The star-nosed mole detects prey in total darkness using its unique nose, covered in 22 finger-like tentacles packed with touch sensors. This extraordinary adaptation lets it identify and eat tiny insects and worms faster than any other mammal, even underwater. ✨ #animals⚡#adaptation⚡#evolution 👉subscribe Interesting Planet
Hashtags
@amazingeo · Post #663 · 16.03.2026 г., 20:31
🌍 Tropical savannas can burn naturally every 1–3 years, yet some species, like the baobab tree, thrive by storing water in thick trunks to survive both drought and fire. ✨ #savanna⚡#grassland⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #503 · 09.12.2025 г., 12:31
🌍 In Chile's Atacama Desert, rare fog called "camanchaca" drifts inland from the Pacific. Some plants here survive by absorbing water directly from this fog, not from rainfall. ✨ #desert⚡#arid⚡#adaptation⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels