bash 将字符串转换为可变小写
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Convert string in variable lower case
提问by meteorBuzz
Using bash version 3.2.57(1)-release (x86_64-apple-darwin14)
使用 bash 版本 3.2.57(1)-release (x86_64-apple-darwin14)
How can I 're-assign' or 'change' the existing value read into a variable.
如何“重新分配”或“更改”读入变量的现有值。
If the user inputs the string IAmString, I'd like propInputto store the value iamstring. I'm simply printing to the console just for example sake.
如果用户输入字符串IAmString，我想propInput存储值iamstring。我只是为了举例而打印到控制台。
read userInput
echo ${userInput} | tr '[:upper:]' '[:lower:]'
回答by Aaron
You should store the output of your commands :
您应该存储命令的输出：
read userInput
userInput=$(echo "$userInput" | tr '[:upper:]' '[:lower:]')
回答by yftse
Ii'm surprised that doesn't already work...
我很惊讶这还行不通...
Did you have trouble storing the value?
您在存储值时遇到问题吗？
If so, you'd have to:
如果是这样，你必须：
userInput=$(echo ${userInput} | tr '[:upper:]' '[:lower:]')
But it looks like a mac environment. What results are you getting?
但它看起来像一个mac环境。你得到什么结果？
Edit, added userInput=$()and restructured to better inquire.
编辑、添加userInput=$()和重组以更好地查询。
