Storing information in an array with automatic ID generation_incrementing

Question

Storing information in an array with automatic ID generation_incrementing

Here is an array in a specific format, however, there is no "ID" field available when the form is submitted. The requirement is to have an auto-generated ID assigned and saved in a JSON Array upon user submission of the form. With each form submission, there should be a check to see if an ID has already been assigned or not. If not, then it should automatically assign one.

private list :any;
 this.list = {
      "a_Rows": [
        {
          "id": "1",
          "sname": "amir",
          "sType": "Cheque",
          "semail": "ert",
          },

javascript arrays json aurelia

Answer 1

Answer №1

Here is a code snippet that you can utilize:

<button onclick="submit()">Submit</button>
submit() {
let s = (new Date()).getTime().toString(16) + Math.random().toString(16).substring(2) + "0".repeat(16);
let uuid = s.substr(0,8) + '-' + s.substr(8,4) + '-4000-8' + s.substr(12,3) + '-' + s.substr(15,12);

let data = {
id : uuid,
sname: "amir",
sType: "Cheque",
semail: "ert"
}
}

Answer 2

Here is a code snippet that you can utilize:

<button onclick="submit()">Submit</button>
submit() {
let s = (new Date()).getTime().toString(16) + Math.random().toString(16).substring(2) + "0".repeat(16);
let uuid = s.substr(0,8) + '-' + s.substr(8,4) + '-4000-8' + s.substr(12,3) + '-' + s.substr(15,12);

let data = {
id : uuid,
sname: "amir",
sType: "Cheque",
semail: "ert"
}
}

Answer 3

Answer №2

Take a look at the following example, where I have created a function that can be customized to generate a unique id and add it to a JSON object along with its corresponding values.

let value = {2071: {id:101, name: "bathri", age:22}}
let idIndex;

function CreateJson(name, age) {
  this.id = generateNewId();
  this.name = name;
  this.age = age;
  return value[this.id] = this;
}
 

function generateNewId() {
  idIndex = Math.floor(Math.random() * 9999) + 1;
  if (Object.keys(value).includes(idIndex) == idIndex) {
    idIndex = generateNewId()
  }
  return idIndex;
}

let result = new CreateJson('nathan', '23')
console.log(value);

Answer 4

Take a look at the following example, where I have created a function that can be customized to generate a unique id and add it to a JSON object along with its corresponding values.

let value = {2071: {id:101, name: "bathri", age:22}}
let idIndex;

function CreateJson(name, age) {
  this.id = generateNewId();
  this.name = name;
  this.age = age;
  return value[this.id] = this;
}
 

function generateNewId() {
  idIndex = Math.floor(Math.random() * 9999) + 1;
  if (Object.keys(value).includes(idIndex) == idIndex) {
    idIndex = generateNewId()
  }
  return idIndex;
}

let result = new CreateJson('nathan', '23')
console.log(value);

Answer 5

Answer №3

To ensure that the id field in JSON has a value when a form is submitted, create a function that generates random ids. If uniqueness is necessary for the id field, all existing ids must be fetched to check for duplicates.

Answer 6

To ensure that the id field in JSON has a value when a form is submitted, create a function that generates random ids. If uniqueness is necessary for the id field, all existing ids must be fetched to check for duplicates.

Answer 7

Answer №4

If you're looking for a way to generate unique identifiers, one option is to use a uuid. These uuids are guaranteed to be unique across different elements. Alternatively, if you prefer integer ids, you can create a global counter that increments with each submission and assign that value as the id for new elements.

Here's an example:


items = [];
idCounter = 0;

function addItem(item) {
    item.id = idCounter++;
    items.push(item);
}

Answer 8

If you're looking for a way to generate unique identifiers, one option is to use a uuid. These uuids are guaranteed to be unique across different elements. Alternatively, if you prefer integer ids, you can create a global counter that increments with each submission and assign that value as the id for new elements.

Here's an example:


items = [];
idCounter = 0;

function addItem(item) {
    item.id = idCounter++;
    items.push(item);
}

Storing information in an array with automatic ID generation_incrementing

Answer №1

Answer №2

Answer №3

Answer №4

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Storing information in an array with automatic ID generation_incrementing

Answer №1

Answer №2

Answer №3

Answer №4

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