Add multiple elements in javascript

Question

I've created empty array like this:

var cars = [];

And I'm going to add every car's name and cost. For instance:

car[0]["name"] = "BMW";
car[0]["cost"] = 50000;

But the problem is, we don't know which index is array dealing with (whether it is 0, 1, 2, 3, 4 ??). Every time I should declare new multidimensional array like this:

car[] = [];

And add two values to it ("name" and "cost") without knowing which index it has. Appreciate any help guys. If my question looks like ridiculous, sorry for that.

car.push({name:"BMW", cost:50000})

Pranav C Balan
– Pranav C Balan

2016-12-09 05:15:12 +00:00
Commented Dec 9, 2016 at 5:15 — Pranav C Balan
– Pranav C Balan, Commented Dec 9, 2016 at 5:15
car[] = {name:"BMW", cost:50000};

LF-DevJourney
– LF-DevJourney

2016-12-09 05:17:21 +00:00
Commented Dec 9, 2016 at 5:17 — LF-DevJourney
– LF-DevJourney, Commented Dec 9, 2016 at 5:17

bugwheels94 · Accepted Answer · 2016-12-09 05:20:13Z

4

You can use Array#push method to insert Objects instead of creating multidimensional array

var cars = [];
//insert elements like

cars.push({name:"BMW", cost:50000});
cars.push({name:"Ferrari", cost:55000});
// see the cars
console.log(cars)

edited Dec 9, 2016 at 5:20

bugwheels94

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answered Dec 9, 2016 at 5:18

Pranav C Balan

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Comments

James111 · Accepted Answer · 2016-12-09 05:20:16Z

1

It looks like you're wanting to store an array of objects? Like so:

[{ name: "BMW", cost: "55222"}, { name: "Toyota", cost: "25222" }]

This way you could start off with an empty array and then just push objects to it:

var carsArray = []
carsArray.push({ name: "BMW", cost: "55222"}) // Push the BMW to the array
carsArray.push({ name: "Toyota", cost: "25222"}) // Push the Toyota to the array
console.log (carsArray) // This will contain two cars

answered Dec 9, 2016 at 5:20

James111

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Comments

Mostafa Omar · Accepted Answer · 2016-12-09 05:30:05Z

0

Generally speaking to deal with arrays you either populate or retrieve Values, what i understood is that you wanna know the index so here's a small example:

 var cars = [];

for population:

 cars.push({name:"BMW", cost:50000}); /*Where {name:"BMW", cost:50000} is a new object 
and you can populate it with any parameters and any values*/

for value retrieval:

for(var i=0;i<cars.length;i++){
   console.log(i);//Here is the index
   console.log(cars[i]);//Here is the value
}

answered Dec 9, 2016 at 5:30

Mostafa Omar

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