google上找到这个stackoverflow上的帖子,才知道Bash 4.0以上版本有更好的办法: 《How to convert a string to lower case in Bash?》 就是${parameter,,pattern},${parameter^^pattern}表达式,表达不会改变原来变量的值 代码语言:javascript 复制 #! /bin/bash# 注意:脚本第一行一定要注明脚本解释器是bash.不能...
google上找到这个stackoverflow上的帖子,才知道Bash 4.0以上版本有更好的办法: 《How to convert a string to lower case in Bash?》 就是${parameter,,pattern},${parameter^^pattern}表达式,表达不会改变原来变量的值 #! /bin/bash # 注意:脚本第一行一定要注明脚本解释器是bash.不能是sh,或dash # 因为sh...
stringbashshelluppercaselowercase 146 我一直在寻找将字符串从大写转换为小写的方法。所有的搜索结果都显示使用 tr 命令的方法。 tr 命令的问题在于,只有在我使用 echo 语句时才能得到结果。例如: y="HELLO" echo $y| tr '[:upper:]' '[:lower:]' 上述代码可以正常运行,结果为'hello',但我需要将结果赋...
变量变大小写 echo ${AA^^} # to uppercase echo ${AA,,} # to lowercase
String data are used for different purposes in any bash commands or programming script. Sometimes we need to change the case of the string to get the desired output. The string can be converted to uppercase or lowercase. The string data is converted by using ‘tr’ command in the old vers...
This expansion modifies the case of alphabetic characters in parameter. The pattern is expanded to produce a pattern just as in pathname expansion. The ^ operator converts lowercase letters matching pattern to uppercase; the , operator converts matching uppercase letters to lowercase. ...
In conclusion, It looks like this:Numbers>Lowercase>Uppercase. And for the sake of this tutorial, I will be using a file namedStudents.txtwhich contains the basic data of 7 students as follows: Name Enrollment_No City Sagar 181240116054 Nadiad ...
case $1 in # set the variables based on what option was used -u) TRCASE=upper EXIT".UC" OPT=yes shift ;; -l) TRCASE=lower EXT=".LC" OPT=yes shift ;; -help) echo "convert a file(s) to uppercase from lowercase" echo "convert a file(s) from lowercase to uppercase" ...
lowercase and uppercase (Not applicable to zsh) #! /usr/local/bin/bash # notice that I changed the bash from /bin/bash (v3.2.57) to /usr/local/bin/bash (v5.0.7) # since bash v3.2 doesn't support the following operation echo "enter 1st string" ...
参考:http://wiki.workassis.com/shell-script-convert-text-to-lowercase-and-uppercase/ 2019-03-1300 雄鞋谋塘 如果使用v4,这就是烘焙。如果没有,这是一个简单,广泛适用的解决方案。此线程上的其他答案(和注释)在创建下面的代码时非常有用。 # Like echo, but converts to lowercase ...