typescript multidimensional array with different types

Question

I have an custom object declared (ThreadObj) and I want to create a THREADLISTS, holding multiple arrays of Threadlist. So

Threadlist:ThreadObj[]=[];
THREADLISTS:[ThreadObj[]][ThreadObj]=[][]; //how to type and init?

The first dim is of ThreadObj[] and the second is of ThreadObj.

Cheers

Possible duplicate of Typescript - multidimensional array initialization — David Sherret
– David Sherret, Commented Apr 13, 2016 at 4:12
I've seen that thread, which unfortunately does not explain the typing question — Han Che
– Han Che, Commented Apr 13, 2016 at 5:12
I believe it does—ThreadObj[][]. If that's not what you mean then can you provide an example of THREADLISTS use? Maybe we're misunderstanding. — David Sherret
– David Sherret, Commented Apr 13, 2016 at 13:52

basarat · Accepted Answer · 2016-04-13 04:20:03Z

3

Example :

type ThreadObj = {foo:string}
type ThreadList = ThreadObj[]; 
type ThreadListList = ThreadList[];

const obj: ThreadObj = {
    foo: '123'
}
const singleDim: ThreadList = [
    obj
]
const multiDim: ThreadListList = [
    singleDim,
    singleDim
]

More

All in one step:

const allInOneStep: {foo:string}[][] = [
    [
        {
            foo: 'hello'
        },
        {
            foo: 'is it me'
        }
    ],
    [ 
        {
            foo: 'you are looking for'
        }
    ]
]

answered Apr 13, 2016 at 4:20

basarat

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Comments

ArcSine · Accepted Answer · 2016-04-13 12:48:16Z

2

Wouldn't that just be:

let arr:ThreadObj[][] = []

answered Apr 13, 2016 at 12:48

ArcSine

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Comments

Bimal Thapa Magar · Accepted Answer · 2023-02-03 18:33:55Z

0

For multi-dimensional array in typescript, you can simply declare and define the variable as

let multiArr:(string|number)[][] = [["Ram","Shyam",1,2,3,"Hari"]];

answered Feb 3, 2023 at 18:33

Bimal Thapa Magar

1

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