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

Try using this

checkRepeat = function (str) {
    var repeats = /(.)\1/;
    return repeats.test(str)
}

Sample usage

if(checkRepeat ("aaaaaaaa"))
alert('Has Repeat!')