Using wildcard in string in Javascript

Question

How can one represent a range of numbers in a string in javascript?

So for example,

var Ages = "This member is x years old";

where x can be any nunber at all.

I want to be able to search for such string in an array of strings.

Answer 1

Javascript is really good for concatenations.

var x = // the age value you are searching for;

var ages = "The member is " + x + " years old";

You can then just wrap this in a loop.

Answer 2

With a regular expression, match and capture \d+ (one or more digits) in place of the x :

 const pattern = /This member is (\d+) years old/; const input = prompt('Input?', 'This member is 99 years old'); const match = pattern.exec(input); if (match) { console.log(match[1]); } else { console.log('Format not recognized'); }