const f = (newStr, givenWord) => { let arr = [...newStr]; let newArr = []; for (let i = 0; i + Math.sqrt(arr.length) < arr.length + 1; i += Math.sqrt(arr.length)) { newArr.push(arr.slice(i, i + Math.sqrt(arr.length))) } console.log(newArr); for (let i = 0; i < newArr.length; i++) { for (let j = 0; j < newArr[i].length; j++) { if (newArr[i][j] == givenWord) { return [i, j]; } } } return [-1, -1]; }; let result = f("QWEASDZXC", "A"); console.log(`[${result[0]} ${result[1]}]`);Prueba con este enfoque
(function(word, letters) { // Convert letters words in an array with indexes of each letter in the word const indexes = letters.split('').map(letter => word.indexOf(letter)); return indexes.filter(index => index !== -1); })('QWEASDZXC', 'AC');Aporte
'QWEASDZXC' 'AC'Salida recibida
[ 3, 8 ]