Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

(tye)Re: Counting number of characters in a string

by tye (Sage)
on Mar 13, 2001 at 02:35 UTC ( [id://63996]=note: print w/replies, xml ) Need Help??


in reply to Counting number of characters in a string

my $count= 0;
for(0..255){
    my $c= pack "C", $_;
    $count += () = $str =~ /\Q$c\E/g;
}

[download]

Warning! This probably yields an inaccurate count for Unicode strings.

        - tye (but my friends call me "Tye")

Replies are listed 'Best First'.
(tye)Re2: Counting number of characters in a string
by tye (Sage) on Mar 13, 2001 at 02:54 UTC

    I just realized that most strings won't have most characters in them so this can be sped up significantly via: 

    my $count= 0;
for( keys %{ { map {$_,1} unpack "C*", $str } }  ){
    my $c= pack "C", $_;
    $count += () = $str =~ /\Q$c\E/g;
}

    [download]
            - tye (but my friends call me "Tye")
[reply]
[d/l]

In Section Seekers of Perl Wisdom

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?

www.com | www.net | www.org
Node Status?
node history
Node Type: note [id://63996]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? • Last hour • Other CB clients
Other Users?
Others meditating upon the Monastery: (4)
As of 2024-04-19 14:58 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found