变量引用在 shell 脚本中的 echo 命令中不起作用

Question

I created two files with exact same data 'a','b','c','d','e' in separate rows
1. testing_office.csv file from ms office 2019.
2. testing_txt_editor.csv using sublime text
Following is shell script which is used.

object_type=$1

for object in `cat ${object_type}`
do
echo "test before object reference" ${object}
echo ${object} "random text after the object reference"
done

i am running the code via zsh shell Following are the commands used and outputs

argarvit >>% ./testing.zsh testing_office.csv 
test before object reference a
a random text after the object reference
test before object reference 
 random text after the object reference
test before object reference b
 random text after the object reference
test before object reference c
 random text after the object reference
test before object reference d
 random text after the object reference
test before object reference e
e random text after the object reference

argarvit >>% ./testing.zsh testing_txt_editor.csv 
test before object reference a
a random text after the object reference
test before object reference b
b random text after the object reference
test before object reference c
c random text after the object reference
test before object reference d
d random text after the object reference
test before object reference e
e random text after the object reference

Why are the two files acting different if there is some text after the reference? The issue might be with encoding but how do i figure out the exact reason? I tried opening testing_office.csv on text editor it looks the same. I tried on MBP as well as AL2 getting same results on both the terminals.

Answer 1

You are using a Useless Use of cat , alas I cannot recreate your problem. Likely there is a core difference between the files stated. You can od -c each file to check.

You may want to try a while read loop instead of backtick expansion:

while read object ; do
        echo "test before object reference" ${object}
        echo ${object} "random text after the object reference"
done <$1