How to locate and match substring of a string in JavaScript?

Question

I need JavaScript algorithm that can match substring of a sting?

subStringFinder('abbcdabbbbbck', 'ab')

should return index 0

and

subStringFinder('abbcdabbbbbck', 'bck') should return index 10

Could you please tell me how to write this code?

--EDIT:

Thanks to @Jonathan.Brink I wrote that code and it did the trick:

function subStringFinder(str, subString) {
  return str.indexOf(subString);
}

subStringFinder('abbcdabbbbbck', 'bck') // -> 10

Jonathan.Brink · Accepted Answer · 2017-07-24T00:14:19.630

3

You are looking for the indexOf function which is available via the built-in string type (as well as array).

Example:

var str = "abbcdabbbbbck";
var n = str.indexOf("bck");
// n is 9

Probably, rather than having a custom subStringFinder function it would be better to just use indexOf.

edited Jul 24 '17 at 00:14

answered Jul 24 '17 at 00:08

Jonathan.Brink

1

Thank you very much! It was so easy with this funcion. – John Taylor Jul 24 '17 at 00:12
You should not answer questions that are obvious duplicates, mark them as a duplicate instead. – RobG Jul 24 '17 at 00:27

1 Answers1