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Full Discussion: How to detect difference between files and print the differences
Top Forums Shell Programming and Scripting How to detect difference between files and print the differences Post 302456809 by branred on Sunday 26th of September 2010 05:22:43 AM
Old 09-26-2010
How to detect difference between files and print the differences
Dear all,

I have some problem here. I want to detect the differences between two text files and count the number of differences between them.

Such as file1.txt i have : I am new in perl.
and file2.txt i have : I ma enw in pearl.

So it should return me 3 as the number of differences.

So far I have


Code:
use File::Compare;
$count = 0;

open (F1, "file1.txt") || die "Could not open file $!";
while (<F1>) { 
    push @array1, [ split ];
}
close (F1);

open (F2, "file2.txt") || die "Could not open file $!";
while (<F2>) {
    push @array2, [ split ];
close (F2);

foreach (@array1) {
    if (@array1 != @array2)
       {$count++;
        print "$count \n";}
}

Is there anything wrong? Please advise.
Thank you so much in advacned
Last edited by Scott; 09-26-2010 at 06:50 AM.. Reason: Please use code tags
 

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LEARN ABOUT PHP

array_intersect

ARRAY_INTERSECT(3)							 1							ARRAY_INTERSECT(3)

array_intersect - Computes the intersection of arrays

SYNOPSIS

       array array_intersect (array  $array1, array  $array2, [array  $...])

DESCRIPTION

       array_intersect(3)  returns  an	array  containing all the values of $array1 that are present in all the arguments. Note that keys are pre-
       served.

PARAMETERS

	      o $array1
		- The array with master values to check.

	      o $array2
		- An array to compare values against.

	      o $...
		- A variable list of arrays to compare.

RETURN VALUES

	Returns an array containing all of the values in $array1 whose values exist in all of the parameters.

EXAMPLES

       Example #1

	      array_intersect(3) example

	      <?php
	      $array1 = array("a" => "green", "red", "blue");
	      $array2 = array("b" => "green", "yellow", "red");
	      $result = array_intersect($array1, $array2);
	      print_r($result);
	      ?>

	      The above example will output:

	      Array
	      (
		  [a] => green
		  [0] => red
	      )

NOTES

       Note

	       Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string	representation	is
	      the same.

SEE ALSO

       array_intersect_assoc(3), array_diff(3), array_diff_assoc(3).

PHP Documentation Group 													ARRAY_INTERSECT(3)
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