my $prev = '';
my $skip_next = 0;
while (<>) {
if (/XXXXX/) {
$prev = '';
$skip_next = 1;
}
elsif ($skip_next) {
--$skip_next;
}
else {
print($prev);
$prev = $_;
}
}
print($prev);
If you want to skip more than one line:
my $skip_before = 1;
my $skip_after = 1;
my @prev;
my $skip_next = 0;
while (<>) {
if (/XXXXX/) {
@prev = ();
$skip_next = $skip_after;
}
elsif ($skip_next) {
--$skip_next;
}
else {
push @prev, $_;
print(shift(@prev)) if @prev > $skip_before;
}
}
print(@prev);
One read. One check. Handles subsequent matching lines. Handles matches on the first line. Handles matches on the last line.
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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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>
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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).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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