Grep (WAS RE: searching an array)

[Timothy Johnson]

I've heard that grep is fairly resource-intensive.  Is there any truth to
the rumors?  Is there a time where using grep will be faster than cycling
through an array?

-----Original Message-----
From: Wagner-David [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 29, 2002 4:20 PM
To: 'Mahendra Thacker'
Cc: [EMAIL PROTECTED]
Subject: RE: searching an array


        Here is one shot:

#!perl -w

my $a = 5;
my @arr = qw( 7 9 3 6 5);

my @MyHits = grep(/$a/ , @arr );
if ( @MyHits ) {
   print "Found $a in the list \n";
} else {
   print "Did not find $a in the list\n";
}

Made minor changes: used warnings, my.

Wags ;)

-----Original Message-----
From: Mahendra Thacker [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 29, 2002 16:09
To: [EMAIL PROTECTED]
Subject: searching an array


Hi,

A question from a relative newbie.

How does one search an array of numbers for a number?
(without using foreach; is there any function?)

Say, I want to do something like this:

==

$a = 5;
@arr = ( 7 9 3 6 );

if ( seach( $a, @arr ) ) {
   print "Found $a in the list \n";
} else {
   print "Did not find $a in the list\n";
}

==

TIA,

Mahendra Thacker




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