Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic

How can I access/change the first N letters of a string?

by faq_monk (Initiate)
on Oct 08, 1999 at 00:20 UTC ( #598=perlfaq nodetype: print w/ replies, xml ) Need Help??

Current Perl documentation can be found at

Here is our local, out-dated (pre-5.6) version:

There are many ways. If you just want to grab a copy, use substr():

    $first_byte = substr($a, 0, 1);

If you want to modify part of a string, the simplest way is often to use substr() as an lvalue:

    substr($a, 0, 3) = "Tom";

Although those with a pattern matching kind of thought process will likely prefer:

    $a =~ s/^.../Tom/;

Log In?

What's my password?
Create A New User
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (8)
As of 2015-11-26 12:44 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (698 votes), past polls