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9.1

regex to extract line containing term

Asked by GessWurker in JavaScript, Perl Programming Language, Regular Expressions

Tags: javascript regex

I've been using
var matches = Input.match(/(?:[^ .,;:]+[ .,;:]+){3}(?:term1|term2)(?:[ .,;:]+[^ .,;:]+){3}/gi);

to extract selected terms and the preceding and succeeding 3 words. I'd like to change the regex so that I extract the line containing the selected terms. The line will be bounded by \n but I'd also like to trim leading and trailing spaces.
How do I alter the regex to do that?

example input:
This line, containing term2, I'd like to extract.
This line contains term13 and I'd like to ignore it
This line, on the other hand, contains term1, so let's keep it.

ouput would be
This line, containing term2, I'd like to extract.
This line, on the other hand, contains term1, so let's keep it.

See code to be altered below.

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             <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
 
<body>
<script>
var Input = "   This line, containing  term2, I'd like to extract."
Input += "        This line contains term13 and I'd like to ignore it."
Input += "  This line, on the other hand, contains term1, so let's keep it."
 
 var matches = Input.match(/(?:[^ .,;:]+[ .,;:]+){3}(?:term1|term2)(?:[ .,;:]+[^ .,;:]+){3}/gi);
 var myMatches = ""
  for (i=0;i<matches.length;i++)
  {
  myMatches += ("..." + matches[i] + "...\n"); //assign to variable
  }
  alert(myMatches)
</script>
 
 
</body>
</html>

           
         

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regex to extract line containing term

Asked by GessWurker in JavaScript, Perl Programming Language, Regular Expressions

Tags: javascript regex

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