Trim all white-space from string and truncate spacesThis is an alternative to sed, awk, perl and other tools. The function below works by abusing word splitting to create a new string without leading/trailing white-space and with truncated spaces....
If you’re making Bash programs for you or for others to use one way you can get user input is to specify arguments for users to provide to your program, as we discussed in the previous section. You could also ask users to type in a string on the command line by temporarily stopping ...
The function below works by finding all leading and trailing white-space and removing it from the start and end of the string. The : built-in is used in place of a temporary variable.Example Function:trim_string() { # Usage: trim_string " example string " : "${1#"${1%%[![:space...
if [[ ${arr[*]} == *sub_string* ]]; then printf '%s\n' "sub_string is in array." fiUsing a case statement:case "$var" in *sub_string*) # Do stuff ;; *sub_string2*) # Do more stuff ;; *) # Else ;; esacCheck if string starts with sub-stringif [[ $var == sub_...
例如,给定: string="hello-world" prefix="hell" suffix="ld" 如何获得以下结果?..."o-wor" 答:使用bash语法的方法: $ prefix="hell" $ suffix="ld" $ string="hello-world" $ foo=${string#"$prefix...hello-world" prefix="hell" suffix="ld" $ echo "$string" | sed -e "s/^$prefix//...
I would like to do something if the output of a shell script contains the string "Caddy 2 serving static files on :2015". This is what I have so far but the beach ball is just spinning. It seems it is because of the last command in my bash script which starts a server. There is...
It then checks if the entered password ('$password') matches the correct password ('$correct_password') using an if statement with a string comparison ([[ ... ]]). If the passwords match, the script prints "Access granted" and exits the loop using the "break" statement. ...
python -c"import os; print [x for x in dir(os) if x.startswith('r')]" 输出结果为: ['read', 'readlink', 'remove', 'removedirs', 'rename', 'renames', 'rmdir'] 设你有一个 Python 模块(文件)mymodule.py,内容如下: # mymodule.py ...
In this example we declare simple bash variable and print it on the screen ( stdout ) with echo command. #!/bin/bash STRING="HELLO WORLD!!!" echo $STRING 1. 2. 3. Your backup script and variables: #!/bin/bash OF=myhome_directory_$(date +%Y%m%d).tar.gz ...
1一些方便系统诊断的bash函数:http://hongjiang.info/common-bash-functions/23这段脚本包含100多个bash函数,是我几年前方便自己调试和诊断问题写的。贴出来给有需要的人,因为比较懒怎么使用这些函数就不写说明了。其中以下划线开头的是表示私有函数,以cf_开头的表示公共函数,可当做命令使用。4# check current os ...