File: mapfile1.sub

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file content (11 lines) | stat: -rw-r--r-- 243 bytes parent folder | download | duplicates (8) 
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: ${TMPDIR:=/tmp}
FILE=$TMPDIR/file

trap 'rm -f $FILE' 0 1 2 3 6 15
printf "%d\n" {1..20} > $FILE

mapfile -n 5 array < $FILE
echo ${array[@]}

mapfile -n 5 -c 1 -C "echo foo" array  < $FILE
mapfile -n 5 -c 1 -C "echo foo" array  < /dev/null