String without repeated characters-CodePudding

I have r = to how many times can letter be repeated in a row and s = to string to check.
For example if s = "aaabbbccc777" and r = 2. result = "aabbcc77".
I need it to be dynamic and as easy and clean as possible.

Thanks for the help in advance.

let s = "bbbaaaccc777cdggg";
let r = 2;

const verification = (s, r) => {
    
}
verification(s, r);

CodePudding user response：

You can iterate over the string like this:

const verification = (s, r) => {
    let res = '', last = null, counter = 0;
    s.split('').forEach(char => {
        if (char == last)
            counter  ;
        else {
            counter = 0;
            last = char;
        }
        if (counter < r)
            res  = char;
    });    
    return res;
}

CodePudding user response：

I guess this is the cleanest way of doing it. It uses an occ object to count the occurrences:

const 
  str = "bbbaaaccc777cdggg",
  rows = 2;

const verification = (s, r) => {
  const occ = {};
  let newStr = "";
  for (const char of str) {
    if (!occ[char])
      occ[char] = 0;
    if (occ[char] < r)
      newStr  = char;
    // Count occurrences
      occ[char];
  }
  return newStr;
};

console.log(verification(str, rows));