Data-Mining the Web Using Perl. Burt L. Monroe Director, Quantitative Social Science Initiative Department of Political Science The Pennsylvania State University. Data-Mining the Web. Examples Election Returns in Luxembourg Luxembourg Official Election Results, 2004
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Burt L. Monroe
Director, Quantitative Social Science Initiative
Department of Political Science
The Pennsylvania State University
Comparison Numeric String
8 < 25 TRUE!
“8” lt “25” FALSE!
any literal character, number, etc.
. any single character
* zero or more of the previous
+ one or more of the previous
? zero or one of the previous
[aeiou] character class – this is the vowels
^ beginning of the line
$ end of the line
\b word boundary
\d \D digit / non-digit
\s \S space / non-space
\w \W word character / non-word character
| or – match this or that