Pushing values into an associative array in JavaScript [duplicate]

Question

I'd like to be able to push values into the associative array below.

var car = [];
car [0] = {type: "audi", age: "10"};
car [1] = {type: "bmw", age: "6"};
car [2] = {type: "tesla", age: "2"};

The method I've tried using to push is the following. Using car.length to push it into the next line of our car array, as it'll always be one higher. I don't know if that's good practice, but I guess it works.

value1 = "hyundai"
value2 = "14";

car[car.length].push({type: value1, age: value2});

I absolutely cannot get this to work, and at this point, as a beginner JS'er, I'm out of ideas.

You are using both [] and push where only one is needed (either use: car[car.length] = {type: value1, age: value2}; or car.push({type: value1, age: value2});, the latter is better). — ibrahim mahrir
– ibrahim mahrir, Commented Jun 11, 2017 at 2:47
Someone has to point out that javascript does not have associative arrays. Arrays in javascript always has a number index. And while I'm being a pedant (most of the time), having a array of "cars" and naming it car (in singular) irks me a bit (bad semantics). — ippi
– ippi, Commented Jun 11, 2017 at 2:53
I would start off by learning about the basic data types in JS and what they are called. JS has no "associative arrays". What you are dealing with is an "array". — user663031
– user663031, Commented Jun 11, 2017 at 3:13

Ravi Gehlot · Accepted Answer · 2017-06-11 02:43:02Z

6

The issue with your code is that you were not calling push on a valid object. Please try this code:

<script>
var car = [];
car [0] = {type: "audi", age: "10"};
car [1] = {type: "bmw", age: "6"};
car [2] = {type: "tesla", age: "2"};

console.log(car);

value1 = "hyundai"
value2 = "14";

car.push({type: value1, age: value2});

console.log(car);
</script>

answered Jun 11, 2017 at 2:43

Ravi Gehlot

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Comments

user 13 · Accepted Answer · 2017-06-11 02:43:48Z

3

you can just car.push({type: value1, age: value2});

answered Jun 11, 2017 at 2:43

user 13

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