javascript regex - replace string stop words

Question

I am trying to write a function that removes specific words from a string.

The below code works ok until the last word of the sentence, as it is not followed by a space that my regex looks for.

How can I capture the last word that is not followed by a space?

function stopwords(input) {

var stop_words = new Array('a', 'about', 'above', 'across');

console.log('IN: ' + input);

stop_words.forEach(function(item) {
    var reg = new RegExp(item +'\\s','gi')

    input = input.replace(reg, "");
});

console.log('OUT: ' + input);
}

stopwords( "this is a test string mentioning the word across and a about");

Denys Séguret · Accepted Answer · 2013-03-16 17:28:17Z

2

You may use the word boundary marker :

var reg = new RegExp(item +'\\b','gi')

answered Mar 16, 2013 at 17:28

Denys Séguret

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Comments

rab · Accepted Answer · 2013-03-16 17:57:12Z

suppose I am passing sea on word

stopwords( "this is a test string sea mentioning the word across and a about");

which will cut down sea to se

function stopwords(input) {

  var stop_words = ['a', 'about', 'above', 'across'];

  console.log('IN: ' + input);

  // JavaScript 1.6 array filter
  var filtered  = input.split( /\b/ ).filter( function( v ){
        return stop_words.indexOf( v ) == -1;
  });

  console.log( 'OUT 1 : ' + filtered.join(''));

  stop_words.forEach(function(item) {
      // your old : var reg = new RegExp(item +'\\s','gi');
      var reg = new RegExp(item +'\\b','gi'); // dystroy comment

      input = input.replace(reg, "");
  });

  console.log('OUT 2 : ' + input);
}

stopwords( "this is a test string sea mentioning the word across and a about");

which has output

IN: this is a test string sea mentioning the word across and a about

OUT 1 : this is  test string sea mentioning the word  and  

OUT 2 : this is  test string se mentioning the word  and

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