What is the method for inserting an object into a jsonArray in TypeScript?

Question

What is the method for inserting an object into a jsonArray in TypeScript?

I am trying to add an object to existing JSON data in TypeScript. I am new to TypeScript and have created an array variable called jsonArrayObject, which contains a boolean[] type. This jsonArrayObject holds a contactModel object with properties like fname, lname, id, and mobile. Below is the code snippet that I tried. Can someone please assist me?

let jsonArrayObject: boolean[] = [];

jsonArrayObject=[{
    contactModel:{
    fname:"vboyini",
    lname:"simha",
    id:"1",
    Mobile:"99768999"
    }
}];
var modelData :String={
 fname:"vboyini2",
lname:"simha2",
id:"2",
Mobile:"799768999"
}

Now, I want to prepend the array item (contactModel object) into the jsonArrayObject. I attempted the following code:

this.jsonArrayObject.unshift({"contactModel":any=modelData})

The above code is not working. Can someone please help me figure out how to achieve this? Thank you.

arrays json angular typescript

Answer 1

Answer №1

When adding an object to an array, there is no requirement to declare it as a boolean.

let jsonArrayObject = [];

jsonArrayObject.push({
  fname:"john",
  lname:"doe",
  id:"123",
  phone:"555-555-5555"
});

Answer 2

When adding an object to an array, there is no requirement to declare it as a boolean.

let jsonArrayObject = [];

jsonArrayObject.push({
  fname:"john",
  lname:"doe",
  id:"123",
  phone:"555-555-5555"
});

Answer 3

Answer №2

To begin with - you're approaching it the wrong way.

Define it in this manner:

    let jsonArrayObject = [];
    jsonArrayObject = [
        {
            fname: 'john',
            lname: 'smith',
            id: '1',
            Mobile: '123456789'
        }
    ];
    let modelData = {
        fname: 'jane',
        lname: 'doe',
        id: '2',
        Mobile: '987654321'
    };

After that, you can add modelData to the Array like this, or use other methods like unshift, slice, splice, etc.

jsonArrayObject.push(modelData);

Answer 4

To begin with - you're approaching it the wrong way.

Define it in this manner:

    let jsonArrayObject = [];
    jsonArrayObject = [
        {
            fname: 'john',
            lname: 'smith',
            id: '1',
            Mobile: '123456789'
        }
    ];
    let modelData = {
        fname: 'jane',
        lname: 'doe',
        id: '2',
        Mobile: '987654321'
    };

After that, you can add modelData to the Array like this, or use other methods like unshift, slice, splice, etc.

jsonArrayObject.push(modelData);

Answer 5

Answer №3

There seems to be a compilation error in your scripts. The array values are mistakenly set as Boolean data type.

let jsonArrayObject: boolean[] = [];

You should correct the format by specifying the right data structure.

interface IContactModelData{
  fname:string;
  lname:string;
  id:string;
  Mobile:string;  
}

interface IContactModel{
  contactModel: IContactModelData   
}

let jsonArrayObject: IContactModel[] = [];

jsonArrayObject=[{
  contactModel:{
    fname:"vboyini",
    lname:"simha",
    id:"1",
    Mobile:"99768999"
  }
}];

var modelData:IContactModelData = {
  fname:"vboyini2",
  lname:"simha2",
  id:"2",
  Mobile:"799768999"
};

jsonArrayObject.push({contactModel:modelData});

Answer 6

There seems to be a compilation error in your scripts. The array values are mistakenly set as Boolean data type.

let jsonArrayObject: boolean[] = [];

You should correct the format by specifying the right data structure.

interface IContactModelData{
  fname:string;
  lname:string;
  id:string;
  Mobile:string;  
}

interface IContactModel{
  contactModel: IContactModelData   
}

let jsonArrayObject: IContactModel[] = [];

jsonArrayObject=[{
  contactModel:{
    fname:"vboyini",
    lname:"simha",
    id:"1",
    Mobile:"99768999"
  }
}];

var modelData:IContactModelData = {
  fname:"vboyini2",
  lname:"simha2",
  id:"2",
  Mobile:"799768999"
};

jsonArrayObject.push({contactModel:modelData});

Answer 7

Answer №4

When using the unshift method, there is no need to specify the type in the object.

Instead, you can simply use the following code:

this.jsonArrayObject.unshift({"contactModel":modelData});

In this code snippet, modelData represents a variable that is passed as an argument.

Answer 8

When using the unshift method, there is no need to specify the type in the object.

Instead, you can simply use the following code:

this.jsonArrayObject.unshift({"contactModel":modelData});

In this code snippet, modelData represents a variable that is passed as an argument.

Answer 9

Answer №5

const userList = [];
const userObj={};
userObj={

    id:2,
    "name":"Jane Smith"
}
userList.push(userObj);

Answer 10

const userList = [];
const userObj={};
userObj={

    id:2,
    "name":"Jane Smith"
}
userList.push(userObj);

What is the method for inserting an object into a jsonArray in TypeScript?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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