Question

I confess at the outset that I dislike and don’t really understand regex properly. I want to check that a single character ch is one of a set of acceptable characters. I thought this should work, but it doesn’t:

if (/aCcehIikmNnOoprSstxYy/.test(ch)) {

What am I doing wrong?

Thanks.

Answer 1

I think this can be solved without regex:

var characters = "aCcehIikmNnOoprSstxYy";
var allowed    = characters.indexOf("C") != -1;

if (allowed) {
  // do something here
}

String.indexOf() returns -1 if character is not in string, otherwise positive number.