Search strings for words in between a tag?

bnjm

How can I use Processing to search strings (Text from a webpage) and pull out the words in-between a tag, for example everything between <p> and </p>

GoToLoop

https://Processing.org/reference/String_indexOf_.html
https://Processing.org/reference/String_substring_.html

benja

What about regular expression?

import java.util.regex.Pattern;
import java.util.regex.Matcher;

String input = "<p>some</p><a>example</a><p>string</p>";
Pattern pattern = Pattern.compile("<p>(.*?)</p>");
Matcher matcher = pattern.matcher(input);
while (matcher.find())
{   
    System.out.println(matcher.group(1));
}

bnjm

Yeah this is it, I am using a regular expression on Max MSP but I cannot yet understand how to achieve finishing that patch so I'm trying to do it on Processing instead. I want to extract the regexp of stuff inside a paragraph tag and write it to a text file. This looks like it could work I will try it out. Thank you

bnjm

Ok here is my very noob code sorry I am just not getting how to loadStrings properly, this doesn't work, how could I like break down the lines[] so it can be used in this regular expression method ?

import java.util.regex.Pattern;
import java.util.regex.Matcher;

String lines[] = loadStrings("http://processing.org/about/index.html");
Pattern pattern = Pattern.compile("<p>(.*?)</p>");

for (int i = 0; i < lines.length; i++) { 
Matcher matcher = pattern.matcher(lines[i]);
while (matcher.find())
{   
    System.out.println(matcher.group(1));
}
}

benja

you could combine all the lines into one string like this:

String completeText ="";
for (int i = 0; i < lines.length; i++) { 
  completeText += lines[i];
}

quark

completeText = join(lines," ");

Will combine all the lines and separate them with a space

bnjm

Excellant. Thank you all, this works

import java.util.regex.Pattern;
import java.util.regex.Matcher;

String lines[] = loadStrings("web page url");
String completeText = "";

for (int i=0; i < lines.length; i++) {
  completeText += lines[i];
}

Pattern pattern = Pattern.compile("<p>(.*?)</p>");
Matcher matcher = pattern.matcher(completeText);

while (matcher.find())
{   
    System.out.println(matcher.group(1));
}