如何将泛型与类数组一起使用？

function processArray<T>(arrayLike: ArrayLike<T>): T[] {
  const array = Array.prototype.slice.call(arrayLike);
  const processedArray: T[] = [];

  for (let i = 0; i< array.length; i++) {
    const element = array[i];
    if (element !== undefined && element !== null) {
      processedArray.push(element);
    }
  }

  return processedArray;
}

interface CustomArray<T> extends ArrayLike<T> {
  customProperty: string;
}

const customArray: CustomArray<number> = {
  0: 1,
  1: 2,
  2: 3,
  length: 3,
  customProperty: "custom"
};

const processedArray = processArray<number>(customArray);
console.log(processedArray); // [1, 2, 3]