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

I solved that using a for loop, not with regex

//This check if a string has 3 repeated letters, if yes return true, instead return false
//If you want more than 3 to check just add another validation in the if check

function stringCheck (string) {
    for (var i = 0; i < string.length; i++)
        if (string[i]===string[i+1] && string[i+1]===string[i+2]) 
            return true
    
    return false 	
}
var str1 = "hello word" //expected false
var str2 = "helllo word" //expredted true
var str3 = "123 blAAbA" //exprected false
var str4 = "hahaha haaa" //exprected true

console.log(str1, "<==", stringCheck(str1))
console.log(str2, "<==", stringCheck(str2))
console.log(str3, "<==", stringCheck(str3))
console.log(str4, "<==", stringCheck(str4))