[英]How can I add items in arraylist from a function? (JavaScript)
I have this function and I want to add this items in my arraylist. I know data.push(...) is not correct, so what it's the correct way?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"
}
]
I assume you want to push all these values as an object into the data array.我假设您想将所有这些值作为 object 推送到数据数组中。 You could achieve that by doing the following.
您可以通过执行以下操作来实现。 By giving the variables the same name as the keys in the object you can leave that out.
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});
}
Try this: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
});
}
Maybe you can use a function that adds according to element ids stored in an array.也许您可以使用 function,它根据存储在数组中的元素 ID 添加。 Errors are not handled.
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"
}
]
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