12-05-2011
Compare Columns of two files
Hi
I have file 1 like this
Quote:
1 kkiid 334 RRRR +
2 kkiii 4455 ssspp +
3 llold 9902 llopp -
4 aasas 1002 ACGT +
and file 2 like this
Quote:
23 iieer 334 TTRR -
44 wwe 9902 OORO +
I need to compare column 3 of both files and delete lines in file1 with same column 3 values in two files. So the output is
Quote:
2 kkiii 4455 ssspp +
4 aasas 1002 ACGT +
I tried with perl but didnt work. A perl code will be good as I am learning the language, but any other code would be just fine. thanks in advance.
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LEARN ABOUT PHP
collator_compare
COLLATOR_COMPARE(3) 1 COLLATOR_COMPARE(3)
Collator::compare - Compare two Unicode strings
Object oriented style
SYNOPSIS
public int Collator::compare (string $str1, string $str2)
DESCRIPTION
Procedural style
int collator_compare (Collator $coll, string $str1, string $str2)
Compare two Unicode strings according to collation rules.
PARAMETERS
o $coll
-Collator object.
o $str1
- The first string to compare.
o $str2
- The second string to compare.
RETURN VALUES
Return comparison result:
o 1 if $str1 is
greater than $str2 ;
o 0 if $str1 is
equal to $str2;
o -1 if $str1 is
less than $str2 .
On error boolean FALSE is returned.
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
collator_compare(3)example
<?php
$s1 = 'Hello';
$s2 = 'hello';
$coll = collator_create( 'en_US' );
$res = collator_compare( $coll, $s1, $s2 );
if ($res === false) {
echo collator_get_error_message( $coll );
} else if( $res > 0 ) {
echo "s1 is greater than s2
";
} else if( $res < 0 ) {
echo "s1 is less than s2
";
} else {
echo "s1 is equal to s2
";
}
?>
The above example will output:
SEE ALSO
collator_sort(3).
PHP Documentation Group COLLATOR_COMPARE(3)