Multi Dimensional array Post: 303012269

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Top Forums Shell Programming and Scripting Multi Dimensional array Post 303012269 by Don Cragun on Thursday 1st of February 2018 02:28:38 PM

02-01-2018

Registered User

Does your shell support associative arrays as well as indexed arrays?

What shell are you using? What version of that shell are you using?

Nothing in your loop is using the values found in array arr. Why not just replace your current loop with:

Code:

for names in "${arr2[@]}";
do
echo data=$(grep "id=$names" /test/test.txt)
done

Since you haven't told us what shell you're using, the following is pure conjecture, but it will work with some shells...

If you need corresponding values from both arrays, have you considered something more like:

Code:

arr=("A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K")
arr2=("8" "2" "3" "4" "1" "9" "5" "6" "7" "10" "11")
for ((i=0; i < ${#arr[@]}; i++))
do	echo "arr[$i] is ${arr[$i]}, arr2[$i] is ${arr2[$i]}"
done

(which works with recent versions of both ksh and bash)?

With both of those shells, the above script produces the output:

Code:

arr[0] is A, arr2[0] is 8
arr[1] is B, arr2[1] is 2
arr[2] is C, arr2[2] is 3
arr[3] is D, arr2[3] is 4
arr[4] is E, arr2[4] is 1
arr[5] is F, arr2[5] is 9
arr[6] is G, arr2[6] is 5
arr[7] is H, arr2[7] is 6
arr[8] is I, arr2[8] is 7
arr[9] is J, arr2[9] is 10
arr[10] is K, arr2[10] is 11

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LEARN ABOUT PHP

reset

RESET(3)								 1								  RESET(3)

reset - Set the internal pointer of an array to its first element

SYNOPSIS

       mixed reset (array  &$array)

DESCRIPTION

       reset(3) rewinds $array's internal pointer to the first element and returns the value of the first array element.

PARAMETERS

	      o $array
		- The input array.

RETURN VALUES

	Returns the value of the first array element, or FALSE if the array is empty.

EXAMPLES

       Example #1

	      reset(3) example

	      <?php

	      $array = array('step one', 'step two', 'step three', 'step four');

	      // by default, the pointer is on the first element
	      echo current($array) . "<br />
"; // "step one"

	      // skip two steps
	      next($array);
	      next($array);
	      echo current($array) . "<br />
"; // "step three"

	      // reset pointer, start again on step one
	      reset($array);
	      echo current($array) . "<br />
"; // "step one"

	      ?>

SEE ALSO

       current(3), each(3), end(3), next(3), prev(3).

PHP Documentation Group 														  RESET(3)

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reset