CODEWITHSUNDEEP
javascriptstringsanitization
Taylor Zimbalist
Taylor Zimbalist

Reputation: 1

How to extract words from string matching those contained in an array of forbidden words (and remove any left-over whitespace)?

How would you extract certain words from a string, given an array of forbidden words.

Consider the following Woody Allen quote as an example:

Love is the answer, 
but while you are waiting for the answer 
sex raises some pretty good questions

And this is the array of words to extract from the string:

var forbidden = new Array("is", "the", "but", "you", 
"are", "for", "the", "some", "pretty");

How would you extract any words from the string, any remove any left-over whitespace so that you end up with this result:

Love answer, while waiting answer sex raises good questions

Upvotes: 0

Views: 821

Answers (2)

MooGoo
MooGoo

Reputation: 48260

var quote = "Love is the answer,\nbut while you are waiting for the answer\nsex raises some pretty good questions";

var forbidden = ["is", "the", "but", "you", "are", "for", "the", "some", "pretty"];

var reg = RegExp('\\b(' + forbidden.join('|') + ')\\b\\s?', 'g');

alert(quote.replace(reg, ''));

Try it: http://jsbin.com/isero5/edit

Upvotes: 2

Emmett
Emmett

Reputation: 14337

 var quote = "Love is the answer, but while you are waiting for the answer sex raises some pretty good questions";
 var forbidden = new Array("is", "the", "but", "you", "are", "for", "the", "some", "pretty");

 var isForbidden = {};
 var i;

 for (i = 0; i < forbidden.length; i++) {
     isForbidden[forbidden[i]] = true;
 }

 var words = quote.split(" ");
 var sanitaryWords = [];

 for (i = 0; i < words.length; i++) {
     if (!isForbidden[words[i]]) {
          sanitaryWords.push(words[i]);
     }
 }

 alert(sanitaryWords.join(" "));

Upvotes: 4

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