Comment by yudlejoza

The example of "foo bar" didn't work with while but inserting tr fixes it:

    echo "foo bar" | tr ' ' '\n' | while read -r var; do echo ${var}; done

For examples in general, I guess something like "cat file.csv" could work. (the difference between using IFS= and not using it is essentially whether we want to preserve leading and trailing whitespaces or not. If we want to preserve, then we should use IFS=).