如何从 function 添加项目到 arraylist？ (JavaScript)

Question

我有这个 function，我想在我的 arraylist 中添加这些项目。我知道 data.push(...) 不正确，那么正确的方法是什么？

          function addinfo(data) {
                var id = document.getElementById("courseid").value;
                var nm = document.getElementById("name").value;
                var yr = document.getElementById("year").value;
                var syll = document.getElementById("syllabus").value;
                var sem = document.getElementById("semester").value;
                var teach = document.getElementById("teaching").value;

                data.push(id,nm,yr,syll,sem,teach);
          }

          var data = [
              {
                courseid: "1",
                name: "Artificial Intelligence",
                year: "2021",
                syllabus: "3",
                semester: "2",
                teaching: "Johan"
              }
          ]

Answer 1

我假设您想将所有这些值作为 object 推送到数据数组中。 您可以通过执行以下操作来实现。 通过为变量赋予与 object 中的键相同的名称，您可以将其省略。

var data = [
  {
    courseid: "1",
    name: "Artificial Intelligence",
    year: "2021",
    syllabus: "3",
    semester: "2",
    teaching: "Johan"
  }
]

function addinfo(data) {
  var courseid = document.getElementById("courseid").value;
  var name = document.getElementById("name").value;
  var year = document.getElementById("year").value;
  var syllabus = document.getElementById("syllabus").value;
  var semester = document.getElementById("semester").value;
  var teaching = document.getElementById("teaching").value;

  data.push({courseid,name,year,syllabus,semester,teaching});
}          

Answer 2

尝试这个：

function addinfo(data) {
  data.push({
    courseid: document.getElementById("courseid").value,
    name: document.getElementById("name").value,
    year: document.getElementById("year").value,
    syllabus: document.getElementById("syllabus").value,
    semester: document.getElementById("semester").value,
    teaching: document.getElementById("teaching").value
  });
}

Answer 3

也许您可以使用 function，它根据存储在数组中的元素 ID 添加。 不处理错误。

const fields = ["courseid", "name", "year", "syllabus", "semester", "teaching"];

function addinfo(anyFieldList, data) {
  const dataItem = {};
  for (let aField of anyFieldList){
    dataItem[aField] = document.getElementById(aField).value;
  }
  data.push(dataItem);
}

let data = [
  {
    courseid: "1",
    name: "Artificial Intelligence",
    year: "2021",
    syllabus: "3",
    semester: "2",
    teaching: "Johan"
  }
]