scanArray

gistfile1.txt

// Given an array of random characters with size n,
// String[] stringArr = ["A", "C", "K", "B" .....];
// write a procedure that will scan the array from the first element
// and print the first character that appear three times during scanning
const TOTAL_APPEAR = 3;

function scanArray(data) {
  let flag = 0;
  const result = []
  const dataLength = data.length;
  // default
  if (data.length === 0) return 'data is empty';
  
  for (let i = 0 ; i < dataLength; i++) {
    let count = 0;
    for (let j = i; j < dataLength; j++) {
      if (data[i] === data[j]) {
        count++;
      }
    }
    
    if (count === TOTAL_APPEAR) {
      flag = 1;
      result.push(data[i]);
    }
  }
  if (flag > 0) return result.toString();
  // default
  if (flag === 0) return 'not found';
}

// data is empty
// const stringArr =  [];
// A
// const stringArr =  ["A","A", "A"];
// B
// const stringArr =  ["A","A", "A","B", "B", "B"];
// not found
// const stringArr =  ["A", "C", "K", "B", "BA", "B", "AC", "C", "A"];
// A,B
// const stringArr =  ["A", "C", "K", "B", "B", "B", "A", "C", "A"];
// BB
// const stringArr =  ["C", "K", "BB", "BB", "BB", "A", "C", "A"];
// A,B, Z
const stringArr =  ["A", "C", "K", "B", "Z", "B", "B", "A", "Z", "C", "A", "Z"];

console.log(scanArray(stringArr))