Array Declaration and For Loop


 
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Old 09-15-2007
Array Declaration and For Loop

I am just stucked in syntax.This is more like a array and for loop problem.

I want to use ls -l command and get filezise and filename of all filenames in the directory in an array (say array#1).
After 2 minutes of sleep, i want to get the same information in another array (say array#2).

The command ls -l | awk '{print $9 " " $5}' prints all the filenames and then space and then the filezise of that file. I want to compare each array value and then get those filenames which have same size in both arrays.



For example:
Declare Array1......
>ls -l | awk '{print $9 " " $5}'
File1 Size1 (copy this value in array1[0])
File2 Size2 (copy this value in array1[1])
File3 Size3 (copy this value in array1[2])
FileN SizeN (copy this value in array1[N])

After sleep 120, make another array called array2 and then
Declare array2.......
>ls -l | awk '{print $9 " " $5}'
File1 Size1 (copy this value in array2[0])
File2 Size2 (copy this value in array2[1])
File3 Size3 (copy this value in array2[2])
FileN SizeN (copy this value in array2[N])

May be we can get new files after 2 minutes but we have to get all the rows in it.

Then using a for loop, compare each value of array1 with array2 and where array1 value=array2 value, I have to get the value of array1 first argument (i.e. File name itself not the whole string which will include the filesize which is seperated by space).

Please convert this to correct synatx in shell.Thanks.
 
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EACH(3) 								 1								   EACH(3)

each - Return the current key and value pair from an array and advance the array cursor

SYNOPSIS
array each (array &$array) DESCRIPTION
Return the current key and value pair from an array and advance the array cursor. After each(3) has executed, the array cursor will be left on the next element of the array, or past the last element if it hits the end of the array. You have to use reset(3) if you want to traverse the array again using each. PARAMETERS
o $array - The input array. RETURN VALUES
Returns the current key and value pair from the array $array. This pair is returned in a four-element array, with the keys 0, 1, key, and value. Elements 0 and key contain the key name of the array element, and 1 and value contain the data. If the internal pointer for the array points past the end of the array contents, each(3) returns FALSE. EXAMPLES
Example #1 each(3) examples <?php $foo = array("bob", "fred", "jussi", "jouni", "egon", "marliese"); $bar = each($foo); print_r($bar); ?> $bar now contains the following key/value pairs: Array ( [1] => bob [value] => bob [0] => 0 [key] => 0 ) <?php $foo = array("Robert" => "Bob", "Seppo" => "Sepi"); $bar = each($foo); print_r($bar); ?> $bar now contains the following key/value pairs: Array ( [1] => Bob [value] => Bob [0] => Robert [key] => Robert ) each(3) is typically used in conjunction with list(3) to traverse an array, here's an example: Example #2 Traversing an array with each(3) <?php $fruit = array('a' => 'apple', 'b' => 'banana', 'c' => 'cranberry'); reset($fruit); while (list($key, $val) = each($fruit)) { echo "$key => $val "; } ?> The above example will output: a => apple b => banana c => cranberry Caution Because assigning an array to another variable resets the original array's pointer, our example above would cause an endless loop had we assigned $fruit to another variable inside the loop. Warning each(3) will also accept objects, but may return unexpected results. It's therefore not recommended to iterate though object proper- ties with each(3). SEE ALSO
key(3), list(3), current(3), reset(3), next(3), prev(3), foreach, Object Iteration. PHP Documentation Group EACH(3)