What does the triple-less-than-sign bash operator, <<<
, mean, as inside the following code block?
LINE="7.6.5.4"
IFS=. read -a ARRAY <<< "$LINE"
echo "$IFS"
echo "${ARRAY[@]}"
Also, why does $IFS
remain to be a space, not a period?
It redirects the string to stdin of the command.
Variables assigned directly before the command in this way only take effect for the command process; the shell remains untouched.