CODEWITHSUNDEEP
javascript
Chris 'Pig' Hill
Chris 'Pig' Hill

Reputation: 175

Using javascript to detect if a word is unavailable...?

I have been using javascript to remove or replace certain words from an RSS feed using the following code:

document.body.innerHTML = document.body.innerHTML.replace( /Words to be removed/g, "Words to be replaced");

I was wondering if there was a way to detect a certain word and display a message if it does not exist?

Upvotes: 1

Views: 92

Answers (2)

Katana314
Katana314

Reputation: 8620

If your regex matches a number of words, I think one possibility here would be to replace the second argument to .replace() with a function. Then, you can implement some counting yourself based on the word that was replaced.

replacedCounts = {};
"bunch of words".replace(/(bunch|of|words)/, function(replaced) {

  var prevCount = replacedCounts[replaced];
  if (!prevCount) { prevCount = 0; }
  replacedCounts[replaced] = prevCount + 1;
  return "replacement string";

}); // result should be: "replacement string replacement string replacement string "
// you can now consult replacedCounts['bunch'], etc, to see how many of each were replaced.

Depending on your exact usage, Praveen's answer may be more useful.

Upvotes: 0

Praveenram Balachandar
Praveenram Balachandar

Reputation: 1585

In a similar manner as you have used, you can use the match method.

var matches = document.body.innerHTML.match(/Word to detect/g);

If there are any matches you'll get an array of values that matched.

if(matches.length > 0)
   alert("Found!");

Something like this should work for you.

Upvotes: 2

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