使用 JavaScript 搜尋數組中的元素

let data = [41, 23, 63, 42, 59];
const searchingElement = 59;
let count = 0;

for (let i = 0; i <= data.length; i++) {
  if (data[i] === searchingElement) {
    console.log(`Element found at position ${i + 1}`);
    break;
  } else if (i === data.length) {
    count++;
  }
}
if (count > 0) {
  console.warn(`Element not found in current array!`);
}

let data = [41, 23, 63, 42, 59, 23];
let totalOccurrences = 0;
const searchingElement = 63;

for (const i in data) {
  if (data[i] === searchingElement) {
    totalOccurrences++;
  }
}
console.log(`Total occurrences of ${searchingElement} is ${totalOccurrences}`);