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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

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Venture Village Wall 🦄

@venturevillagewall · Post #3755 · 30.12.2024 г., 22:00

DeFi Innovations and Bitcoin Surge Bitcoin valued at $92,000, Jan van Eck predicts possible future value at $300,000. In notable developments, TON Foundation partners with Jupiter to launch a liquidity aggregator on the TON Virtual Machine, enhancing DeFi capabilities. MicroStrategy recently acquired 2,138 BTC for $209 million, raising total BTC holdings to 446,400. Meanwhile, a massive transfer of 100 million USDC has been reported on Coinbase. #Bitcoin#DeFi#Jupiter#TON#Crypto#MicroStrategy#Liquidity#Blockchain#Investment#USDC#WhaleAlert#TVM#Finance#Partnership#DAO#Cryptocurrency #2025 #Future#Ecosystem

Crypto M - Crypto News

@CryptoM · Post #65294 · 12.04.2026 г., 15:15

🚀 TRON Network Implements Proposal 106 to Enhance Compatibility TRON Network has officially passed Proposal 106 as of April 10 at 20:00 UTC+8. According to ChainCatcher, the mainnet has adjusted the behavior and execution cost of the SELFDESTRUCT instruction. Contracts will only be permanently removed from the blockchain if the instruction is called within the same transaction as the contract's creation. Otherwise, executing the instruction will merely transfer the assets within the contract to a specified address, without deleting the contract itself. Additionally, the energy consumption for SELFDESTRUCT has been changed from 0 to 5000. This adjustment aligns TRON's mechanisms more closely with Ethereum, enhancing the compatibility of the TRON Virtual Machine (TVM). It aims to provide more stable foundational support for multi-chain development and ecosystem adaptation. #TRON#Proposal106#Blockchain#Ethereum#TVM#SELFDESTRUCT#Mainnet#MultiChain#Ecosystem#Crypto#ETH#TRX

Venture Village Wall 🦄

@venturevillagewall · Post #4059 · 03.02.2025 г., 16:00

Massive USDT Transfer and Market Insights 🚨 160 million #USDT transferred from #Bitfinex to Tether Treasury. Bybit CEO estimates total liquidations in crypto exceed $2 billion, likely closer to $8-10 billion. U.S. tariffs on Canada, Mexico, and China commence soon, with negotiations expected. This week features major earnings reports from Google, AMD, MicroStrategy, and Amazon. Market impacts await as the U.S. NFP and unemployment rate data are released next week. 📊 Weekly Spot ETF Flows: BTC +$559M, ETH -$45.5M. 🔗 Full report here: link 🔗 More on TVM Ventures: link #USDT#Crypto#Bitfinex#Bybit#Liquidation#Tariffs#Earnings#Google#MicroStrategy#Amazon#NFP#Unemployment#TVM#DeFi#Investment#MarketInsights#Finance#Blockchain#CryptoNews#VC#ETH