So short

IF you swap the positions of any of the special characters with each other, your solution won't notice -- among other false positive errors.

Of course a regex is not NECESSARY, but it is a very concise and clear way to solve the problem.

How we can mention result in getWorth which is mentioned in result declaration
By that,I mean why we can't do like this:
return (worth[index] * value);
And I don't understatnd what is initial value of result by the way?
I have cognitive dissonance >_<

Use https://regex101.com/

Can someone tell me what the ^ and $ mean in a regular expression?

Its harder to understand your solution. Is it really better than regex?

An admirable functional solution. The weakness of this particular implementation is that it exchanges for brevity the clarity afforded by self-documenting code. The significance of each array element is left undisclosed to the poor maintenance developer.

Beautiful!

Nice. I didn't know that $ meant end.

Read carefully about return values of String.match. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/match

This is the best solution =)