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How to Delete, Edit array items from Javascript

How to Delete, Edit array items from Javascript

Kasuni Abegunawardana

Kasuni Abegunawardana

8y1.5kJSP

Hi, all, please take a look at this code and help me to complete this.

Thank you.

var _students = [];
function addStudent() {
var lblMsgInfo = document.getElementById("labelMessageInfo");
lblMsgInfo.innerHTML = "";
if (isFormValid()) {
var regnum = document.getElementById("textboxRegistrationNumber").value;
var newStudent = {
RegNum: regnum
};
_students.push(newStudent);
var ul = document.getElementById("listStudents");
var li = document.createElement("li");
li.appendChild(document.createTextNode(newStudent.RegNum ));
ul.appendChild(li);
//alert('Student added successfully to the list');
lblMsgInfo.innerHTML = "Student added successfully to the list";
}
}
function isFormValid() {
//Validate form
var lblMsg = document.getElementById("labelMessageError");
lblMsg.innerHTML = "";
var regnum = document.getElementById("textboxRegistrationNumber").value;
if (regnum.length == 0) {
lblMsg.innerHTML = "Registration number is required";
return false;
} else if (isRegnumalreadyExist(regnum)) {
lblMsg.innerHTML = "Registration number already exist";
return false;
}
return true;
}
function isRegnumalreadyExist(regNum) {
for (var i = 0; i < _students.length; i++) {
if (_students[i].RegNum == regNum)
return true;
}
return false;
}
// Clear Function
function resetform() {
document.getElementById("myform").reset();
}
//Delete Function
function DeleteRecord() {
}

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Nanddeep Nachan8y ago
Still, you can use indexOf() function to get the index based on value entered in textbox
Kasuni Abegunawardana8y ago
Hi Nanddeep Thank you for the reply.

Here u are using an arry with items. But i just wanna get them from text box and delete edit. Thank you
Nanddeep Nachan8y ago
To Delete an item from array, get the index of item and splice it.
var array = [2, 5, 9];
var index = array.indexOf(5);
array.splice(index, 1);
To edit the item:
array[index] = 10;