Slides - University of Washington
Slides - University of Washington
Slides - University of Washington
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<strong>University</strong> <strong>of</strong> <strong>Washington</strong><br />
Ling472 Introduction to Computational Linguistics<br />
Lecture 1:<br />
Introduction<br />
Capture groups<br />
• Use parentheses to ‘capture’ part <strong>of</strong> a match<br />
and copy it to the output<br />
• () creates a group you can reference<br />
• \n references the nth group<br />
• Example: to search for repeated words:<br />
([a‐z]+) \1 \1<br />
“I called kitty kitty kitty.”<br />
Monday, April 1, 2013<br />
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