Neato & thanks.
I don't understand why one solution uses map & count and the other just uses
count. Is map implied in the second solution?
----- Original Message -----
From: "Paul" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; "Bill Lawry" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, April 26, 2001 6:59 PM
Subject: Re: [BPQ] help!! any idea whats wrong with this??
>
> --- Paul <[EMAIL PROTECTED]> wrote:
> >
> > --- Bill Lawry <[EMAIL PROTECTED]> wrote:
> > > Pretty cool but when used on a file it breaks hyphenated words into
> > > their components and counts them separately:
> > >
> > > 17 occurrences of 'Acct'
> > > 3 occurrences of 'Authentic'
> > > etc
> > >
> > > instead of:
> > >
> > > 3 occurrences of Acct-Authentic
> > > 3 occurrences of Acct-Delay-Time
> > > 1 occurrences of Acct-Input-Octets
> > > 1 occurrences of Acct-Input-Packets
> > > 1 occurrences of Acct-Output-Octets
> > > 1 occurrences of Acct-Output-Packets
> > > 3 occurrences of Acct-Session-Id
> > > 1 occurrences of Acct-Session-Time
> > > 3 occurrences of Acct-Status-Type
> >
> > Not what you want? Then let's edit the pattern. =o)
> >
> > Instead of
> > map { $count{$_}++ } $data =~ /(\w+)/sog;
> >
> > try
> > $count{$_}++ } for $data =~ /([\w-]+)/sog;
>
> OOOOps............^ Make that:
>
> $count{$_}++ for $data =~ /([\w-]+)/sog;
>
>
> > > ----- Original Message -----
> > > From: "Michael Lamertz" <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Cc: "Chris Brown" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
> > > Sent: Tuesday, April 24, 2001 1:03 PM
> > > Subject: Re: [BPQ] help!! any idea whats wrong with this??
> > >
> > >
> > > > Paul ([EMAIL PROTECTED]) wrote:
> > > > >
> > > > > #!/usr/local/bin/perl -w
> > > > >
> > > > > use strict
> > > > > open (FILE,$0) or die $!; # this reads itself
> > > > > my($data,%count);
> > > > > { local $/ = undef; # erases the record seperator for
> > this
> > > block
> > > > > $data = <FILE>; # slurps in the whole file to $data
> > > > > }
> > > > > close(FILE); # good habit
> > > > > map { $count{$_}++ } $data =~ /(\w+)/sog; # watch the context!
> > > > > print map { "$count{$_} occurances of '$_'\n" } sort keys
> > > %count;
> > > > >
> > > > > Perl is a wonderfully concise language.
> > > > > The above is strictly given as an example of a few performance
> > > tricks
> > > > > that are worth researching. =o)
> > > >
> > > > I agree printing the map output, but I disagree using map to
> > > calculate
> > > > the sums. map always generates a new array that immediately gets
> > > dumped
> > > > since it's not assigned. A foreach would be nicer to system
> > > resources
> > > > and better to read. To make it short, use it postfix:
> > > >
> > > > $count{$_}++ foreach ($data=~ /.../);
> > > >
> > > > Check 'perldoc perlfaq6' for reference.
> > > >
> > > > --
> > > > If we fail, we will lose the war.
> > > >
> > > > Michael Lamertz | [EMAIL PROTECTED] /
> > > [EMAIL PROTECTED]
> > > > Nordstr. 49 | http://www.lamertz.net
> > > > 50733 Cologne | Work: +49 221 3091-121
> > > > Germany | Priv: +49 221 445420 / +49 171 6900
> > 310
> > > >
> > >
> >
> >
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>
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