Is there a reason that you have to split the lines in the first place? That is, if the last four fileds are significant and always lumped together, you shouldn't waste time splitting and joining those fields.
Also, you shouldn't loop over <DATA> more than once unless absolutely necessary. It can be expensive if the file is large.
my %seen;
while (<DATA>) {
/^([^\|]+)\|(.*)/; # split at the first "|"
my ($key, $value) = ($2,$1);
next if $seen{$key};
print "$key: $value\n";
$seen{$key}++;
}
__DATA__
34|4|45|56|45
45|34|45|00|23
45|34|45|00|27
34|4|456|56|03
36|4|456|56|03
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|