将命令的输出附加到 Bash 中的变量
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Appending output from a command to a variable in Bash
提问by Bobby
I'm trying to append an output of a command to a variable in Bash. My code is
我正在尝试将命令的输出附加到 Bash 中的变量。我的代码是
#!/bin/bash
for file in *
do
lineInfo=`wc -l $file`
echo "$lineInfo"
done
I understand how to "capture" the output of a command to a variable as I have done in this line by the use of backquotes.
我了解如何通过使用反引号将命令的输出“捕获”到变量，就像我在这一行中所做的那样。
lineInfo=`wc -l $file`
Is there a clean cut way I can place the output of that entire for loop into a variable in Bash? Or in each iteration of the for loop append the output of the wc command to linesInfo ? (Without redirecting anything to files) Thanks.
有没有一种简洁的方法可以将整个 for 循环的输出放入 Bash 中的变量中？或者在 for 循环的每次迭代中将 wc 命令的输出附加到 linesInfo ？（不将任何内容重定向到文件）谢谢。
回答by geckon
This stores all the line infos (separated by commas) into one variable and prints that variable:
这将所有行信息（以逗号分隔）存储到一个变量中并打印该变量：
#!/bin/bash
total=""
for file in *
do
lineInfo=`wc -l $file`
total="$total$lineInfo, " # or total+="$lineInfo, "
done
echo $total
