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: #akashap
@PensivePost · Post #5438 · 28.09.2021 г., 13:10
#review#AkashAP Contemplating about this quote, it's quite interesting but confusing as well. After the mistake, why would a good man spend time in sorrow instead of learning. And a bad man too... Please describe.
@PensivePost · Post #5442 · 30.09.2021 г., 04:13
I am blind not with the eye, but with the heart; 'Trust' was one of them. #AkashAP#quote#review Meaning : i was blind with the heart (A kind man) because of that i did trust on someone more than myself. Every good people or a kind man did it once. 👍😁
@PensivePost · Post #5439 · 29.09.2021 г., 03:26
"Negativity surrounds man in despair." #AkashAP#quote#review
@PensivePost · Post #5436 · 28.09.2021 г., 04:56
After the mistake, The good man spends moments in sorrow and the bad man in pride. #AkashAP#quote#review
@PensivePost · Post #5435 · 28.09.2021 г., 03:26
Efforts of separate from eachother or Its thoughts, bring each other more closer. #AkashAP#quote#review
@PensivePost · Post #5453 · 06.10.2021 г., 10:42
The book shows the way to a person, Does not give it by crossing the path. #AkashAP#review#qoute
@PensivePost · Post #5452 · 06.10.2021 г., 10:23
"Excessive imagination destroys man" #AkashAP#review#qoute
@PensivePost · Post #5417 · 24.09.2021 г., 06:04
When she is dismal, The heart cries blart, An auspicious time, it was When I met her: The world says My heart is a stone heart, So how did this heart Fall in love with her? The sun isn't so beautiful When it rises: I forget my self When i look in her eyes. #AkashAP#review#shortpoem
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@PensivePost · Post #5451 · 06.10.2021 г., 09:59
I'm looking for a man who says, "Giving a relationship time doesn't break it." #AkashAP#review#satire
@PensivePost · Post #5444 · 01.10.2021 г., 03:29
Those who say: "I'm not in love", then Whose face comes with closed eyes? "Love makes its presence felt even in its absence." #AkashAP#review#words
@PensivePost · Post #5571 · 29.12.2021 г., 05:25
She's one in a billion!! Her smell's like rosemary perfume, And golden hair's like sonagachi; The lips are looking like amaryllis; The face is like the morning sun; Body is as soft as the balloon; Her voice is as sweet as elaichi; Brown eyes are like killing us – And such beauty is only one!! • Difficult Words • Sonagachi - known as Golden Tree Amaryllis - known as Red Beautiful Flower Elaichi - Cardamom #AkashAP#review#poem#oldone#noshare