What is the typescript definition like for a an array of object?

Question

I have this javascript object:

subjects = {
    "1": { "id": 1, "name": "City" },
    "100": { "id": 100, "name": "Test" }
};

Can someone help me by telling me how I could define this in typescript. I know I can use "any" but I would like to do this properly

David Driscoll · Accepted Answer · 2015-07-01 13:29:00Z

1

If you're looking to be able to iterate over the array using a for loop, you'd need to define length as well.

Then in theory you could define it as subjects : { id: number; name: string; }[] = <...>

If you don't want to iterate over it, then you could just define it as subjects : { [key: string] : { id: number; name: string; } } = <...>

answered Jul 1, 2015 at 13:29

David Driscoll

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1 Comment

Samantha J T Star Over a year ago

- Thanks. Actually I want to iterate over it with a forEach. I have another question on that. Maybe you could have a quick look and then perhaps I can accept both answers if you can see what is wrong. Thanks

Altay Mazlum · Accepted Answer · 2015-07-01 12:45:47Z

1

subjects list:number[] = [1, 2, 3];

or

subjects list:Array<number> = [1, 2, 3];

answered Jul 1, 2015 at 12:45

Altay Mazlum

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2 Comments

Samantha J T Star Over a year ago

Is there a way that I could also define the contents of my object such as the id and name? Thanks

Altay Mazlum Over a year ago

Inside the array you ask?

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