从数组中筛选出字符串

function filterStringsFromArray(arr) {
  var result = [];
  for (var i = 0; i < arr.length; i++) {
    if (typeof arr[i] === 'string') {
      result.push(arr[i]);
    }
  }
  return result;
}

// 示例用法
var array = [1, 'hello', true, 'world', 5, 'foo'];
var filteredArray = filterStringsFromArray(array);
console.log(filteredArray);