如何在 Bash 中对字符串中的每个字符执行 for 循环? [英] How to perform a for loop on each character in a string in Bash?

问题描述

我有一个这样的变量:

words="这是一条狗。"

我想对每个字符进行 for 循环，一次一个，例如先character="这"，然后是character="是"、character="一"等

I want to make a for loop on each of the characters, one at a time, e.g. first character="这", then character="是", character="一", etc.

我知道的唯一方法是将每个字符输出到文件中的单独行，然后使用while read line，但这似乎效率很低.

The only way I know is to output each character to separate line in a file, then use while read line, but this seems very inefficient.

• 如何通过 for 循环处理字符串中的每个字符?

推荐答案

With sed on dash shell of LANG=en_US.UTF-8，我的以下工作正常:

With sed on dash shell of LANG=en_US.UTF-8, I got the followings working right:

$ echo "你好嗎 新年好。全型句號" | sed -e 's/(.)/1
/g'
你
好
嗎

新
年
好
。
全
型
句
號

和

$ echo "Hello world" | sed -e 's/(.)/1
/g'
H
e
l
l
o

w
o
r
l
d

因此，可以使用 while read ... 来循环输出；做 ... ;完成

编辑示例文本翻译成英文:

edited for sample text translate into English:

"你好嗎 新年好。全型句號" is zh_TW.UTF-8 encoding for:
"你好嗎"     = How are you[ doing]
" "         = a normal space character
"新年好"     = Happy new year
"。全型空格" = a double-byte-sized full-stop followed by text description

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