如何在zsh中一次遍历一个单词 [英] How to iterate through string one word at a time in zsh

问题描述

如何修改以下代码，以便在 zsh 中运行时扩展 $things 并一次遍历它们?

How do I modify the following code so that when run in zsh it expands $things and iterates through them one at a time?

things="one two"

for one_thing in $things; do
    echo $one_thing
done

我希望输出是:

one 
two

但是正如上面写的，它输出:

But as written above, it outputs:

one two

(我正在寻找在 bash 中运行上述代码时您得到的行为)

(I'm looking for the behavior that you get when running the above code in bash)

推荐答案

为了查看与 Bourne shell 兼容的行为，您需要设置选项 SH_WORD_SPLIT:

In order to see the behavior compatible with Bourne shell, you'd need to set the option SH_WORD_SPLIT:

setopt shwordsplit      # this can be unset by saying: unsetopt shwordsplit
things="one two"

for one_thing in $things; do
    echo $one_thing
done

会产生:

one
two

但是，建议使用数组进行分词，例如，

However, it's recommended to use an array for producing word splitting, e.g.,

things=(one two)

for one_thing in $things; do
    echo $one_thing
done

<小时>

您可能还想参考:

---

You may also want to refer to:

3.1:为什么 $var where var="foo bar" 不符合我的预期?

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