passing a function to replace with regex with match as arg

Question

This javascript code needs to pass the invoke the function convert and use its returned value to replace every match. But it is not sending the cid value to the convert function. Any idea how to? Thanks

const convert = function (cid) {
    console.log('got: ' + cid); // got NAN
    const converted = Math.round(Number(cid) * 16.3871);
    console.log(converted);
    return converted
};
    return myStr.replace(/(\d{3})/g, convert('$1'));
}

It would be good if you post the complete function code

Vineesh
– Vineesh

2017-09-07 08:07:43 +00:00
Commented Sep 7, 2017 at 8:07 — Vineesh
– Vineesh, Commented Sep 7, 2017 at 8:07

Paweł · Accepted Answer · 2017-09-07 08:25:35Z

1

Don't invoke the convert function as the second replace parameter. It will be invoked automatically and pass $1 match on its own as 1st convert argument. And the second return is incorrect (out of function).

const convert = function (cid) {
      console.log('got: ' + cid); // got NAN
      const converted = Math.round(Number(cid) * 16.3871);
      console.log(converted);
      return converted;
    };

var someString = 'abc134def';

console.log(someString.replace(/(\d{3})/g, convert));

answered Sep 7, 2017 at 8:25

Paweł

4,5466 gold badges26 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

passing a function to replace with regex with match as arg

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related