What is the best way to convert an array of strings into an array of objects in Angular 2?

Question

Let's say I have an array as follows:

types = ['Old', 'New', 'Template'];

I need to convert it into an array of objects that looks like this:

[
    {
        id: 1,
        name: 'Old'
    },
    {
        id: 2,
        name: 'New'
    },
    {
        id: 3,
        name: 'Template'
    }
]

['Old', 'New', 'Template'].map((x,i) =>({ id: i + 1, name: x})) — yurzui
– yurzui, Commented May 30, 2017 at 10:16
@notyetdecided answering instead of yurzui... simply: let newArr = ['Old', 'New', 'Template'].map((x,i) =>({ id: i + 1, name: x})) :) — AVJT82
– AVJT82, Commented May 30, 2017 at 11:07
The same thing happens here too as in the answer below. The newly created array of objects contains another object in the name field and not just the string. Can anyone solve this? — i_code
– i_code, Commented May 30, 2017 at 11:09
@notyetdecided are you sure that the types array doesn't contain objects? try debugging and checking out the actual values. — toskv
– toskv, Commented May 30, 2017 at 11:22

toskv · Accepted Answer · 2017-05-30 10:55:23Z

2

You can use map to iterate over the original array and create new objects.

let types = ['Old', 'New', 'Template'];

let objects = types.map((value, index) => {
  return {
    id: index + 1,
    name: value
  };
})

You can check a working example here.

edited May 30, 2017 at 10:55

answered May 30, 2017 at 10:16

toskv

31.8k7 gold badges77 silver badges77 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

i_code Over a year ago

I tried this but the resulting array contains objects whose id's are proper but the name field contains another object with id and name fields and not just the string.

toskv Over a year ago

that can't happen unless you have something else but strings in the types array. I added a working playground link where you can see the solution working. :)

i_code Over a year ago

I'm sorry, you're right. I was experimenting with the wrong array while testing. Thank you.

Vaibhav Sharma · Accepted Answer · 2017-05-31 12:57:27Z

The solution of above problem is the map() method of JavaScript or Type Script.

map() method creates a new array with the results of calling a provided function on every element in the calling array.
let newArray = arr.map((currentvalue,index,array)=>{
return Element of array
});

/*map() method creates a new array with the results of calling 
a provided function on every element in the calling array.*/

     let types = [
         'Old',
         'New',
         'Template'
        ];


  /*
    let newArray = arr.map((currentvalue,index,array)=>{
         return Element of array
     });
  */


   let Obj = types.map((value, i) => {
         let data = {
                 id: i + 1,
                 name: value
             };

      return data;
    });

    console.log("Obj", Obj);

Please follow following links:

TypeScript

JS-Fiddle

We can achieve the solution of above problem by for loop :

let types = [
    "One",
    "Two",
    "Three"
];

let arr = [];

for (let i = 0; i < types.length; i++){
    let data = {
        id: i + 1,
        name: types[i]
    };
    arr.push(data);
}

console.log("data", arr);

Collectives™ on Stack Overflow

What is the best way to convert an array of strings into an array of objects in Angular 2?

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related