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Top Forums Shell Programming and Scripting Removing last and first characters in a file Post 302908248 by Scrutinizer on Saturday 5th of July 2014 02:09:13 AM
Old 07-05-2014
Try:
Code:
for var in i j k
do 
  read $var
  eval $var=\${$var#.} 
  eval $var=\${$var%/*}/
done < file

As always, be very careful with eval with data from an uncontrolled source, as there may be security issues. It is better to do this with an array instead of separate variables.

Code:
i=0
while read arr[i]
do
  arr[i]=${arr[i]#.}
  arr[i]=${arr[i]%/*}/
  (( i++ ))
done < file

Code:
echo "${arr[0]}"
echo "${arr[1]}"
echo "${arr[2]}"


Last edited by Scrutinizer; 07-05-2014 at 03:28 AM..
 

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CURRENT(3)								 1								CURRENT(3)

current - Return the current element in an array

SYNOPSIS
mixed current (array &$array) DESCRIPTION
Every array has an internal pointer to its "current" element, which is initialized to the first element inserted into the array. PARAMETERS
o $array - The array. RETURN VALUES
The current(3) function simply returns the value of the array element that's currently being pointed to by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list or the array is empty, current(3) returns FALSE. Warning This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function. EXAMPLES
Example #1 Example use of current(3) and friends <?php $transport = array('foot', 'bike', 'car', 'plane'); $mode = current($transport); // $mode = 'foot'; $mode = next($transport); // $mode = 'bike'; $mode = current($transport); // $mode = 'bike'; $mode = prev($transport); // $mode = 'foot'; $mode = end($transport); // $mode = 'plane'; $mode = current($transport); // $mode = 'plane'; $arr = array(); var_dump(current($arr)); // bool(false) $arr = array(array()); var_dump(current($arr)); // array(0) { } ?> NOTES
Note You won't be able to distinguish the end of an array from a boolean FALSE element. To properly traverse an array which may contain FALSE elements, see the each(3) function. SEE ALSO
end(3), key(3), each(3), prev(3), reset(3), next(3). PHP Documentation Group CURRENT(3)
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