Javascript Array with Dynamic Editable Objects and values

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I have to track cars and car types/colors without a database and I'm looking for a way to create an array with objects that I can update and delete, then be able to call the array.

So maybe something like this where I can add/edit/delete any of the object properties by car:

let cars = [];
cars['ferrari'] = "red";
cars["lambo"] = "white";
cars["bentley"] = "silver";

I know how to get the value with this example:

showcolor = 'ferrari';

Is it possible to push a new object into this array and/or update a single car and change the color for that car with a function that looks for the object value 'ferrari' and changes its color to 'black'? Also if I wanted to create an alert to show the contents of the array, how can I do that?

Or use an array, but let each element of the array be an object.

let cars = [];
cars.push({ make: 'ferrari', color: 'red' });
cars.push({ make: 'lambo', color: 'white' });
cars.push({ make: 'bentley', color: 'silver' });

// Make the lambo black instead of white.
cars.find(car => car.make == 'lambo').color = 'black';

Output is:


Note the lambo color changed.

How do I build a nested object in Javascript dynamically , Say I have two arrays like so, const arr1 = ['a','b']; const arr2 = ['a… EDIT: just realized this solution doesnt work, but its my closest attempt so far what values you explicitly know, and which will be dynamically assigned. In JavaScript, an array is another object you use to hold values. Instead of assigning and calling properties, an array lets you call values using an index. An index describes the location of a value stored in memory. With an array object, you defined the number of values you want to store, and retrieve these values based on their associated index.

You shouldn't use an array. Use an object:

let cars = {}; // {} creates a new object

cars['ferrari'] = "red";
cars["lambo"] = "white";
cars["bentley"] = "silver";

// add new car
cars['bugatti'] = 'blue';

// update car
cars['lambo'] = 'green'


Hacks for Creating JavaScript Arrays, Arrays in JavaScript are high-level list-like objects with a length However, when you want to dynamically create arrays, the array literal The fill() method fills all the elements of an array from a start index to an You can get a live code demo by running the following pen on Codepen: JS. Result. EDIT ON. Array Elements Can Be Objects. JavaScript variables can be objects. Arrays are special kinds of objects. Because of this, you can have variables of different types in the same Array. You can have objects in an Array. You can have functions in an Array. You can have arrays in an Array:

Use object oriented JavaScript

class Cars{
  constructor(color) {
    this.color= color;
  function getColor(){

Then create an instant of it

var mycar = new Cars('Blue');

How to Set Dynamic Property Keys with ES6, a dynamic key. With ES6, we can finally create dynamic variable key in the object declaration We can output the object value by passing in the appropriate key. Because I used Edit this post How to Deep Clone an Array in JavaScript  Array; Plain objects also support similar methods, but the syntax is a bit different. Object.keys, values, entries. For plain objects, the following methods are available: Object.keys(obj) – returns an array of keys. Object.values(obj) – returns an array of values. Object.entries(obj) – returns an array of [key, value] pairs.

You can use Map from ES20015  standart.
let cars = new Map([
    ['ferrari',   'red'],
    ['lambo', 'white'],
    ['bentley',   'silver']

console.log(cars.get('ferrari')) // red

You can also add car: cars.set('bmw','black');

console.log(cars.get('bmw')) // black

For updating: cars.set('bmw','blue');

Use for ... of for alerts data:

for(let car of cars) { alert(car); }

Arrays, Arrays. Objects allow you to store keyed collections of values. That's fine. The total count of the elements in the array is its length : let fruits  Dynamic Arrays: In many a cases we will not want to create the array with a fixed size or length. In such cases we can create an array with out passing length. This array will dynamically set its value as and when a new variable or entry is added. Syntax: var araay = new Array();

Variable variables - Manual, At this point two variables have been defined and stored in the PHP symbol tree: $a In this example, I needed to load an array with dynamically named objects  Introduction to Dynamic Array in JavaScript. Dynamic Array in JavaScript means either increasing or decreasing the size of the array automatically. JavaScript is not typed dependent so there is no static array. JavaScript directly allows array as dynamic only. We can perform adding, removing elements based on index values.

JavaScript, In order to set an object's key by variable, here are few steps to follow. key by variable key and then inserts {“GFG_key”:”GFG_Val”} object to a array. val and then inserts {“GFG_key”:”GFG_N_Val”} object to a array. filter_none. edit How to change the value of a global variable inside of a function using JavaScript ? Dynamically creating properties on objects using javascript. Object oriented JavaScript provides great flexibility when coding on the client side. Properties on the Javascript object help set values that can be used within the object to manage and use the data. A background on what I mean by properties in javascript.

Dynamic style - manipulating CSS with JavaScript, Dynamic style - manipulating CSS with JavaScript removeChild(element) , where element is the style sheet object you wish to remove and For each stylesheet object retrieved from the styleSheets array you can access its title At this point you should understand how to edit style sheets connected to the page and  An object in JavaScript is a data type that is composed of a collection of names or keys and values, represented in name:value pairs. The name:value pairs can consist of properties that may contain any data type — including strings, numbers, and Booleans — as well as methods , which are functions contained within an object.

  • Have you considered using a Map?…
  • Or an object of objects where key is the make. So you can access car properties like cars['ferrarri']['color'].
  • This is rock solid. No doubt there are a few ways to do this and I'm appreciative of everyone's effort. This will definitely help me with the cars. Thank you!