= "${default_version}" ]; then nvm use default fi elif [[ -s "${nvm_path}/.nvmrc" && -r "${nvm_path}/.nvmrc" ]]; then declare nvm_version nvm_version=$(<"${nvm_path}"/.nvmrc) declare locally_resolved_nvm_version # `nvm ls` will check all locally-available versions # If...
1. echo ${#string} 2. expr length $string 变量默认情况下为字符型,若要进行算数运算,需用let命令或declare –I声明为整型 let命令自动将变量变为整型,进行整型运算 (( ))圆括号也可以实现类似c语言风格的整型运算 自加、自减运算符是shell中未曾定义过,使用时需要c语言风格的双圆括号(())变量的两种间接...
declare -r var1 声明一个只读变量 declare -i number 声明一个整数 declare -a arr 声明一个数组 declare -a arr(1 2 4) 声明一个数组并初始化 unset array[1] # 删除数组中第一个元素 echo ${arr[0]} 输出变量 declare -f function_name 列出指定函数 declare -f 列出前面所有前面定义的函数 declar...
1#/bin/bash2#3declare -i SHOWNUM=04declare -i SHOWUSERS=056forIin`seq1$#`;do7if[ $# -gt0];then8case$1in9-h|--help)10echo"Usage:`basename $0` -h|--help -c|count -v|--verbose"11exit0;;12-v|--verbose)13let SHOWUSERS=114shift;;15-c|--count)16let SHOWNUM=117shift;;18...
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declare -a iob_commands=( "shutdown" "halt" "poweroff" "reboot" "systemctl start" "systemctl stop" "mount" "umount" "systemd-run" "apt-get" "apt" "dpkg" "make" "ping" "fping" "arp-scan" "setcap" "vcgencmd" ...
declare -A MirrorBackup MirrorBackup=(["debian0"]="" ["debian1"]="http://deb.debian.org/debian" ["debian2"]="http://archive.debian.org/debian" ["ubuntu0"]="" ["ubuntu1"]="http://archive.ubuntu.com/ubuntu" ["ubuntu1"]="http://ports.ubuntu.com" ["centos0"]="" ["centos...
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The authors declare no competing interests. Ethics approval and consent to participate Tissue acquisition and handling of human tissue specimens used in this study have been approved by the Ethics Committee of Tongji Medical College, Huazhong University of Science and Technology. All patients provided ...
The authors declare that they have no conflict of interest. All applicable international, national, and institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or pract...