CODEWITHSUNDEEP
javascriptjquery
Ricky
Ricky

Reputation: 275

Check for required exact keyword(s) in text (javascript)

I need to be able to check for required keyword(s).

Here's what i'm currently using:

    // Check for all the phrases
    for (var i = 0; i < phrases.length; i++) {
      if (value.toLowerCase().indexOf(phrases[i].toLowerCase()) < 0) {
         // Phrase not found
         missingPhrase = phrases[i];
         break;
      }
    }

The problem is that it'll say 'random' is fine if 'randomize' is included.

I found this: how to check if text exists in javascript var (just an example)

But not sure of the best way to incorporate it in jQuery with the possibly to check for multiple keywords.

Upvotes: 1

Views: 419

Answers (3)

selbie
selbie

Reputation: 104494

var value_mod = " " + value + " "; // put a fake white space at the beginning and end so we can have a word boundary at the start and end of the line
var regs = [];
var i;
for (i = 0; i < phrases.length; i++) {
    regs.push = new RegExp("\\b" + phrases[i] + "\\b", "i"); /* \b is "word boundary"   "i" for case-insensitive */
}
for (i = 0; i < regs.length; i++) {
     if (regs[i].test(value_mod)) {
        // expression match on whole word.
     } else {
         missingPhrase = phrases[i];
         break;
     }
  }
}

Upvotes: 1

Stephen Perelson
Stephen Perelson

Reputation: 6773

If you are looking for keywords then why not split() the value on the space character to separate the words into an array. Then loop through the array looking for the keyword.

Taking into account the comments: You should also remove a variety of punctuation characters, maybe replacing them with spaces.

Upvotes: 1

Gonzalo Larralde
Gonzalo Larralde

Reputation: 3541

Using the function that you've linked, you can do:

".randomize blah...asd.".containsWord("(hello|blah)")

That's because regexs can match different string as you can see here

In order to make it more readable, you can modify containsWord to accept an array, and escape chars and make the regex based on it.

Good luck!

Upvotes: 1

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