Re: [PD] Parsing Pd patches in Javascript, Python, Java

Hopefully this is useful to someone else.

It will be :)

Thanks, Pedro

On Mon, Nov 29, 2010 at 4:46 AM, Chris McCormick chris@mccormick.cx wrote:

Hi,

Here is how you can parse Pd patches into rows of atoms in three languages using regular expressions:

/*** Javascript ***/

   var lines_re = new

RegExp("(#((.|\r|\n)*?)[^\\])\r{0,1}\n{0,1};\r{0,1}\n", "gi"); for (pdline = lines_re.exec(patchtext)) { var atoms = pdline[1].split(/ |\r\n?|\n/); }

### Python ###

   lines_re = re.compile("(#(.*?)[^\\\])\r{0,1}\n{0,1};\r{0,1}\n",

re.MULTILINE | re.DOTALL) split_re = re.compile(" |\r\n?|\n", re.MULTILINE) for found in lines_re.finditer(patch): line = found.group(1) atoms = split_re.split(line)

/*** Java ***/

   private static final String line_re =

"(#((.|\r|\n)*?)[^\\])\r{0,1}\n{0,1};\r{0,1}\n"; private static final String token_re = " |\r\n?|\n";

   Pattern pattern = Pattern.compile(line_re, Pattern.MULTILINE);
   Pattern token_pattern = Pattern.compile(token_re,

Pattern.MULTILINE); Matcher matcher = pattern.matcher(patchtext); ArrayList<String[]> atomlines = new ArrayList<String[]>(); while (matcher.find()) { String[] s = token_pattern.split(matcher.group(1)); atomlines.add(token_pattern.split(matcher.group(1))); }

Also here is a regular expression for matching dollar args:

   /(?:\\{0,1}\$)(\d+)/g;

Hopefully this is useful to someone else.

Cheers,

Chris.

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http://mccormick.cx

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