在循环中连接字符串中的输入

Question

我有一个源变量,基本上是一串逗号分隔的元素:

SOURCES="a b c d e"

我希望用户为每个源输入一个目的地,因此我希望将此输入存储到类似于上面但包含目的地的字符串中.如果我想分配a = 1,b = 2 ......等,我会这样:

echo $DESTINATIONS >>> "1 2 3 4 5"

为了做到这一点,我这样做:

SOURCES="a b c d e"
DESTINATIONS=""

for src in $SOURCES
do
    echo Input destination to associate to the source $src:
    read dest
    DESTINATIONS=$DESTINATIONS $dest
done

但是,如果我做一个echo上$DESTINATIONS,我觉得很空.而且,在每个循环中,我的shell告诉我:

-bash: = **myInput**: command not found

知道我哪里做错了吗？

Answer 1

您应该使用数组，而不是分隔字符串。

sources=(a b c d e)

for src in "${sources[@]}"
do
    read -p "Input destination to associate to the source $src" dest
    destinations+=( "$dest" )
done

printf '%s\n' "${destinations[@]}"

Answer 2

SOURCES="a b c d e"
DESTINATIONS=""

for src in $SOURCES
do
    echo Input destination to associate to the source $src:
    read dest
    DESTINATIONS+=" ${dest}"
done
echo $DESTINATIONS

适合我.