检查一下
var my_array = [“a”,”b”,”c”,”k”,”d”];
var start_index = 3
var number_of_elements_to_remove = 1;
var removed_elements = my_array.splice(start_index, number_of_elements_to_remove);
console.log(removed_elements);
//[“k”]
console.log(my_array);
//[“a”,”b”,”c”,”d”];
</code>