如何迭代包含bash空格的列表

时间:2013-01-29 16:51:55

标签: bash loops

你能告诉我如何迭代列表中的项目可以包含空格吗?

x=("some word", "other word", "third word")
for word in $x ; do
    echo -e "$word\n"
done

如何强制输出:

some word
other word
third word

而不是:

some
word
(...)
third
word

2 个答案:

答案 0 :(得分:7)

要正确循环浏览项目,您需要使用${var[@]}。并且您需要引用它以确保包含空格的项目不会被拆分:"${var[@]}"

所有在一起:

x=("some word" "other word" "third word")
for word in "${x[@]}" ; do
  echo -e "$word\n"
done

或者,printfx=("some word" "other word" "third word") for word in "${x[@]}" ; do printf '%s\n\n' "$word" done

{{1}}

答案 1 :(得分:2)

两种可能的解决方案,一种类似于fedorqui的解决方案,没有额外的',',另一种使用数组索引:

x=( 'some word' 'other word' 'third word')

# Use array indexing
let len=${#x[@]}-1
for i in $(seq 0 $len); do
        echo -e "${x[i]}"
done

# Use array expansion
for word in "${x[@]}" ; do
  echo -e "$word"
done

输出:

some word
other word
third word
some word
other word
third word

修改修复了cravoori指出的索引解决方案的问题