porter-stemmer test

porter-stemmer.js

var stemmer = require('porter-stemmer').stemmer;

var sentence = "bar. barred. bar it! barred! go bar yourself! foo-head";

var blockList = ['foo', 'bar'];

function fillString(size, char) {
  str = "";
  for(var i=0; i<size; i++) {
    str += char;
  }

  return str;
}

function replacer(str, p1, offset, s) {
  var index = blockList.indexOf(stemmer(p1));
  if (index === -1) { 
    return str;
  } else {
    return p1.substring(0,1) + fillString(p1.length-1,'*');
  }
}

console.log("blockList: %s\noriginal: %s\nreplaced: %s\n", blockList, sentence, sentence.replace(/(\w+)/gi, replacer));
===================
blockList: foo,bar
original: bar. barred. bar it! barred! go bar yourself! foo-head
replaced: b**. b*****. b** it! b*****! go b** yourself! f**-head