perl - help understanding pattern matching in regex
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Published on 2010-04-29T07:53:30Z
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2010/04/29
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Hit count: 203
$line =~ /^(\d+)\s/;
next if(!defined($1) ) ;
$paperAnnot{$1} = $line;
What is the $1
? Is that the match found for (\d+)
?
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