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Postsdbo
PO
 

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  1. PO
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    <p>I would switch to reading two lines, rather than one:</p> <pre><code>#!/usr/bin/perl use strict; use warnings; use autodie; print "X,Y,Val\n"; for my $filename (@ARGV) { open my $log, "&lt;", $filename; while (my $coord_line = &lt;$log&gt;) { my ($x, $y) = $coord_line =~ /\((-?[0-9]+),(-?[0-9])\)/ or die "bad coored line"; my $results_line = &lt;$log&gt;; my ($val,$err) = $results_line =~ /^Results.*\((.*),(.*)\)$/ or die "bad results line"; print "$x,$y,$val:$err\n"; } } </code></pre> <p>One of the benefits of this approach is that your variables are now properly scoped. A simpler version of this program is:</p> <pre><code>#!/usr/bin/perl use strict; use warnings; use ARGV::readonly; #prevent files like "|ls" from breaking us print "X,Y,Val\n"; while (&lt;&gt;) { my ($x, $y) = /\((-?[0-9]+),(-?[0-9]+)\)/ or die "bad coored line"; my ($val,$err) = &lt;&gt; =~ /^Results.*\((.*),(.*)\)$/ or die "bad results line"; print "$x,$y,$val:$err\n"; } </code></pre> <p>Another variant that takes into account the possibility of lines between the two lines we care about. It assumes the first coordinate pair is the right one:</p> <pre><code>#!/usr/bin/perl use strict; use warnings; use ARGV::readonly; #prevent files like "|ls" from breaking us print "X,Y,Val\n"; while (&lt;&gt;) { next unless my ($x, $y) = /\((-?[0-9]+),(-?[0-9]+)\)/; my ($val, $err); while (&lt;&gt;) { last if ($val, $err) = /^Results.*\((.*),(.*)\)$/; } die "bad format" unless defined $val; print "$x,$y,$val:$err\n"; } </code></pre> <p>And this one handles the case where you want the last coordinate line:</p> <pre><code>#!/usr/bin/perl use strict; use warnings; use ARGV::readonly; #prevent files like "|ls" from breaking us print "X,Y,Val\n"; my ($x, $y); while (&lt;&gt;) { ($x, $y) = ($1, $2) if /\((-?[0-9]+),(-?[0-9]+)\)/; next unless my ($val, $err) = /^Results.*\((.*),(.*)\)$/; print "$x,$y,$val:$err\n"; } </code></pre>
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    1. POBest way to assert that multiple values are defined in Perl (0 and "" are defined)
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    1. PTAnswer
    1. USChas. Owens
    1. USChas. Owens
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    1. POBest way to assert that multiple values are defined in Perl (0 and "" are defined)
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    1. VO
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    2. VO
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    1. COI got the impression that there may be irrelevant lines between the relevant ones. If so, it is not certain that the "Results" line follows the x,y line.
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      1. USTLP
    2. CO@TLP then it is simple to add a second while loop that searches until it finds the `Results` line.
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      1. USChas. Owens
    3. CO@TLP, yes that's correct. These files are over 100,000 lines, most of which is not relevant to this data.
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      1. USOregonTrail
 

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