How to determine if a string contains a sequence of repeated letters

Question

Using JavaScript, I need to check if a given string contains a sequence of repeated letters, like this:

\"aaaaa\"

How can I do t

Answer 1

You can use this function:

function hasRepeatedLetters(str) {
    var patt = /^([a-z])\1+$/;
    var result = patt.test(str);
    return result;
}