小编Sup*_*oob的帖子

我是 bash 新手，需要帮助解决这个问题。

#!/bin/bash

str="This Is My Bash String"
mod="-val"

# Loop through characters of str. If index is 0, insert mod at position 0. And if the current index contains space (" "), then insert mod after the space.

echo -e str
# This should output: -valThis -valIs -valMy -valBash -valString

我怎样才能做到这一点？