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
⭐Expression: “Easy peasy Japanesey!”
When something is so simple you can do it with your eyes half-closed,Americans sometimes joke and say:
👉 “Easy peasy Japanesey!”
It’s playful, childish, and super informal, perfect when you want to sound fun and light-hearted.
Example:
A: Can you fix this for me?
B: Sure. Easy peasy Japanesey!
Meaning: “Piece of cake. No big deal.”
#Expression
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@Sirjimmy
🌍Around the world in expressions!✈️
🇨🇭“I’m Switzerland” – Staying neutral like a pro.
🇫🇷“Excuse my French” – Oops… did I just swear? 😅
🇬🇷“It’s all Greek to me” – Totally incomprehensible! 🤯
🇳🇱 “Let’s go Dutch” – Sharing is caring (and paying!) 💸
💬 Which one is your favorite? Or do you have your own “worldly” saying?
#Expression
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@Sirjimmy
🔵 Today’s Expression:
“Whatchamacallit” /ˈwɒtʃəməˌkɔːlɪt/
“Whatchamacallit” is a fun, casual word we use when we can’t remember the name of something or when the name simply doesn’t matter.
🔹Meaning
A playful replacement for the name of an object you can’t recall.
🔹Examples
🔹Pass me that whatchamacallit...the phone holder.
🔹Do we still have that spicy whatchamacallit sauce?
🔹I need the whatchamacallit to connect my laptop to the TV.
#Expression
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@Sirjimmy
❤️ It's my turn to + (verb)
✍🏻« When stating 'my turn' you are telling someone that it is time to change position or position focuses on to you.»
💭Here are some examples:
🔷"It's my turn to walk you home.”
🔷"It's my turn to do laundry."
🔷"It's my turn to take out the trash."
🔷"It is my turn to roll the dice."
🔷"It is my turn to attempt solving the problem."
#Expression
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#sirjimmy
The point is that + (subject + verb)
✍🏻«By stating 'the point is' you are stating in your opinion the meaning about what is actually happening.»
📍Here are some examples:📍
📕"The point is that if you study you will do well in school."
📕"The point is that she does not understand."
📕"The point is that the world would be a better place."
📕"The point is that snakes can be dangerous."
📕"The point is that leaving a baby alone is not a good idea."
📕"The point is that if we do not leave now we will be late."
📕"The point is that she needs to be more responsible."
◽️◽️◽️◽️◽️◽️◽️◽️◽️
#Expression
#Teamjimmy
#sirjimmy
💢 Ahead Of One's Time
🎨 Meaning:
🍃 In advance of current ideas and trends.
🎨 Usage:
🍃 Some people describe Albert Einstein was a physicist ahead of his time.
〰〰〰〰〰〰〰〰〰〰〰〰
Level: Intermediate_Advanced
=========================
#Idiom#Expression#Ahead
@TowardDiscoveringEnglish
Expressionlar va ulardan resurslar so'rovlarida foydalanish
Talablarga binoan, siz kutgan mavzu - Expressionlar. Barchaga ma'lumki, database dan kelayotgan ma'lumotlarni dinamik holatda filterlash, saralash unchalik ham oson emas. Ushbu mahorat darsimizda, Sultonbek sizlarga expression/query lar bilan ishlashning yangicha usulini taqdim etmoqchi. Eng qizig'i shundaki, bizning speaker mavzudan ilhomlanib, ushbu amaliyot uchun yangi kutubxona ham ishlab chiqishga ulguribdi. Judayam qiziq, sinab ko'ramiz-a, nima deysiz?
Barchangizni ushbu mahorat darsida kutib qolamiz. Kirsangiz xursand bo'lamiz, kirmasangiz hafa bo'lish yo'q )
Sana: 22-yanvar, 20:00
Havola: Zoom
Speaker: Sultonbek Rakhimov
#expression#linq#filtering#sorting
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Do you know someone who always thinks that everyone else has a better life than them?! 🙄😅 Scroll through the images to find out how to use ‘the grass is always greener on the other side’ 🌱, and don’t forget to answer the questions on the last slide!
EXTRA: Could walking 7,000 steps a day could improve your mental health? 🚶 Click the link in our bio to find out and learn some useful vocabulary in the process! 📰💚
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You know when somebody just WON’T change their ways? 😠 We’ve got an English expression for that! ✅
Scroll through the images to find out how to use ‘You can’t teach an old dog new tricks.’ ❌🐶
Can you use it in a sentence – and do you have a similar expression in your language? 👇👇👇
MORE: If you'd like to learn some more animal idioms, like 'rabbit on 🐰' or 'as sick as a parrot 🦜', click the link in our bio!
Image: Getty
#trick#proverb#learnenglish#vocabulary#learnenglish#englishlanguage#expression#idiom#englishclass#speakenglish