如何使用javascript查找字符串中是否包含特定数量的连续连续数字？

Question

假设我想知道一个字符串是否包含5个或更多连续的连续数字.

var a = "ac39270982"; // False
var a = "000223344998"; // False
var a = "512345jj7"; // True - it contains 12345
var a = "aa456780"; // True - it contains 45678

是否有可用于实现此目的的RegEx？它是否也能够在以下情况下工作？

var a = "5111213141587"; // True

这应该是真的,因为它包含11,12,13,14,15.

我不确定是否可以检查提供的示例(单位数,两位数字)以及更大的数字(三位数等).

Answer 1

function NstreamsOfNumberN (str) {
    
    for (let i = 0; i < str.length; i++) {
        
        let numBeingConsidered = Number(str[i]);
                
        let numOfComparisonsToBeDone = numBeingConsidered - 1;
        
        for (let j = i; j < numOfComparisonsToBeDone + i; j++) {
                
            if (str[j] != str[j+1]) {break}//compare neigbourin nums

            else if ((j - i + 1) === numOfComparisonsToBeDone)  
            { let theNwithNstreams = numBeingConsidered
              return [str, (theNwithNstreams), true]} 

        //(j - i + 1) equals num of comparisons that has been done.
        }
    }
    return [str,null,false]
}

NstreamsOfNumberN('334775555583444582')

9 streams of the number 9 
8 streams of the number 8 
7 streams of the number 7 ...
3 streams of the number 3
2 streams of the number 2.