A guide on implementing JSON parsing in TypeScript

Question

A guide on implementing JSON parsing in TypeScript

I have experience with JSON parsing in Android and often come across responses like the one below:

{
    "contacts": [
        {
                "id": "c200",
                "name": "Ravi Tamada",
                "email": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b7c5d6c1def7d0d6dedb99d4d8da">[email protected]</a>",
                "address": "xx-xx-xxxx,x - street, x - country",
                "gender" : "male",
                "phone": {
                    "mobile": "+91 0000000000",
                    "home": "00 000000",
                    "office": "00 000000"
                }
        },
        {
                "id": "c201",
                "name": "Johnny Depp",
                "email": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d2b8bdbabcbcab8db6b7a2a292b5bfb3bbbefcb1bdbf">[email protected]</a>",
                "address": "xx-xx-xxxx,x - street, x - country",
                "gender" : "male",
                "phone": {
                    "mobile": "+91 0000000000",
                    "home": "00 000000",
                    "office": "00 000000"
                }
        },

  ]
}

When working with this type of response, we typically extract the data as shown below:

    JSONObject jsonObj = new JSONObject(jsonStr);


                        JSONArray contacts = jsonObj.getJSONArray("contacts");


                        for (int i = 0; i < contacts.length(); i++) {
                            JSONObject c = contacts.getJSONObject(i);

                            String id = c.getString("id");
                            String name = c.getString("name");
                            String email = c.getString("email");
                            String address = c.getString("address");
                            String gender = c.getString("gender");

                            JSONObject phone = c.getJSONObject("phone");
                            String mobile = phone.getString("mobile");
                            String home = phone.getString("home");
                            String office = phone.getString("office");
}
}

Now, I am exploring how to achieve the same data extraction in TypeScript using Angular2. As a beginner in Angular2, I would appreciate any guidance on this matter. Thank you.

android json angular typescript

Answer 1

Answer №1

When working with TypeScript, the process of parsing a JSON string is similar to that in JavaScript. You can use JSON.parse(yourString) to parse a JSON string and JSON.stringify to convert your JavaScript object/array into a JSON string.

The JSON.parse function returns a plain object, allowing you to access its properties using dot notation (e.g. myObject.myProperty) or array notation (e.g. myObject['myProperty']).

For more information, refer to MDN

Answer 2

When working with TypeScript, the process of parsing a JSON string is similar to that in JavaScript. You can use JSON.parse(yourString) to parse a JSON string and JSON.stringify to convert your JavaScript object/array into a JSON string.

The JSON.parse function returns a plain object, allowing you to access its properties using dot notation (e.g. myObject.myProperty) or array notation (e.g. myObject['myProperty']).

For more information, refer to MDN

Answer 3

Answer №2

Typescript is a language that extends Javascript, allowing any valid Javascript code to also be valid Typescript code. Javascript comes with a built-in global parser:

let jsonString='{"hello": "World"}';

let myObject= JSON.parse(jsonString);

console.log(myObject.hello);

This functionality also works in reverse:

let obj= {
  key1: 1,
  key2: "Hi there",
  key3: new Date()
  }
  
  console.log(JSON.stringify(obj));

Answer 4

Typescript is a language that extends Javascript, allowing any valid Javascript code to also be valid Typescript code. Javascript comes with a built-in global parser:

let jsonString='{"hello": "World"}';

let myObject= JSON.parse(jsonString);

console.log(myObject.hello);

This functionality also works in reverse:

let obj= {
  key1: 1,
  key2: "Hi there",
  key3: new Date()
  }
  
  console.log(JSON.stringify(obj));

A guide on implementing JSON parsing in TypeScript

Answer №1

Answer №2

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