Shell Programming and Scripting

i=0
grep '.*' datafile | while read line
do
	echo $i
	array[$i]=$(echo $line)
	echo ${array[1]} #printing array to make sure it's still there
	(( i++ ))
done

echo ${array[1]} #isn't there anymore

i=0
while read line
do
 ..
 ..
done < datafile

array[$i]=$(echo $line)
# could be
array[$i]="$line"

i=0
grep '.*' datafile | {
while read line
do
        echo $i
        array[$i]=$(echo $line)
        echo ${array[1]} #printing array to make sure it's still there
        (( i++ ))
done

echo ${array[1]} #isn't there anymore
}

$ cat read_file.sh

i=0
while IFS= read line
do
  set_array="${set_array}array[$i]='${line}';"
  (( i++ ))
done < inputfile
eval ${set_array}

echo "array size=${#array[*]}"
for ((i=0; i<${#array[*]}; i++))
do
   echo "array[$i]=${array[$i]}"
done

$ cat inputfile
First line
Line 2
Last line
$ ./read_file.sh
array size=3
array[0]=First line
array[1]=Line 2
array[2]=Last line
$