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: #human
@fight4f · Post #8468 · 18.06.2024 г., 05:25
人類研究幾千年來 大部份人也是基因混血 國家/國籍 = 與基因血緣沒有關係 基因= 大部份人的基因也沒有100%純正 歷代祖先 = 很多今天的國家,在古代也不存在, 所以不要亂說自己祖先是那國及那種人。 膚色 = 人種頂多能分 : 黑人 白人 黄人 及中亞人 , 再細分也是一樣, 某國那國也只是國籍政治及文化圈劃分( 基因也是不純的) #Human
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@everything_science · Post #3469 · 22.05.2025 г., 20:53
Deep voiced men tend to have a lower concentration of sperm in their ejaculation than men with higher pitched voices. #Human 🔔@Everything_Science
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@everything_science · Post #3445 · 10.05.2025 г., 08:15
man from New Zealand named Nigel Richards won the French Scrabble championship without actually speaking French. #Human 🔔@Everything_Science
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@everything_science · Post #3441 · 07.05.2025 г., 17:01
Former billionaire Chuck Feeney has given away over 99% of his $8 billion to help underprivileged kids go to college. By the time of his passing in October 2023, he was worth less than $2 million. #Human 🔔@Everything_Science
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@everything_science · Post #3436 · 05.05.2025 г., 17:23
Steve Harvey sent a TV every year to the teacher who said he would never be on television. #Human 🔔@Everything_Science
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@everything_science · Post #3433 · 04.05.2025 г., 06:38
This woman donated a kidney to her boss and then got fired for taking extended time to recover from the surgery. #Human 🔔@Everything_Science
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@everything_science · Post #3430 · 02.05.2025 г., 10:00
When Messi heard a boy had been wearing his jersey made from a plastic bag, he sent the boy a real one signed by him. #Human 🔔@Everything_Science
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@everything_science · Post #3422 · 30.04.2025 г., 05:18
A German man created a traffic jam on an empty street in Google Maps by wheeling around 99 smartphones. #Human 🔔@Everything_Science
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@everything_science · Post #3407 · 22.04.2025 г., 16:51
Japanese man earns $80,000 per year by renting himself out as a friend to lonely people. #Human 🔔@Everything_Science
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@everything_science · Post #3406 · 20.04.2025 г., 20:16
In 1978, Richard Branson wanted to impress his girlfriend by pretending to buy a private island. The island was listed for $6 million and he offered $100,000 as a joke. The owner settled for $180,000 and Branson bought Necker Island. #Human 🔔@Everything_Science
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@everything_science · Post #3389 · 10.04.2025 г., 20:05
92-year-old woman graduated college, proving it is never too late. #Human 🔔@Everything_Science
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@everything_science · Post #3387 · 09.04.2025 г., 16:18
Bill Gates owns a rare McDonald's Gold card that grants him free food for life. #Human 🔔@Everything_Science
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