How to modify array on NodeJS

Question

this is my array in model file,

var genres = [
  "Action",
  "Comedy",
  "Documentary"
];

I need to return(res.send) like this,

 [
      { label: "Action", value: 1 },
      { label: "Comedy", value: 2 },
      { label: "Documentary", value: 3 },
      { label: "Drama", value: 4 }
   ];

I wrote get a request like this,

router.get("/genre", (req, res, next) => {
  try {
    let genre = MovieModel.genres;
    res.send(genre);
  } catch (e) {
    return res.send(e.message);
  }
});

Please just choose an answer to mark this as solved (the tick sign on the left of each answer). — James Hibbard
– James Hibbard, Commented May 5, 2019 at 14:57

Dillan Wilding · Accepted Answer · 2019-05-05 14:52:26Z

2

You could use Array.map to compose a new array.

router.get("/genre", (req, res, next) => {
  try {
    res.send(MovieModel.genres.map((genre, index) => { return { label: genre, value: index }; }));
  } catch (e) {
    return res.send(e.message);
  }
});

answered May 5, 2019 at 14:52

Dillan Wilding

1,1312 gold badges13 silver badges31 bronze badges

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

Comments

James Hibbard · Accepted Answer · 2019-05-05 14:55:29Z

0

const genres = [
  "Action",
  "Comedy",
  "Documentary"
];

const newGenres = genres.map((genre, i) => {
  return (
    { "label": genre, "value": i + 1 }
  )
});

console.log(newGenres);

Gives you:

[
  { label: "Action", value: 1 },
  { label: "Comedy", value: 2 },
  { label: "Documentary", value: 3 },
  { label: "Drama", value: 4 }
];

To return this via res.send:

router.get("/genre", (req, res, next) => {
  try {
    let genres = MovieModel.genres;
    res.send(
      genres.map(
        (genre, i) => { return { "label": genre, "value": i + 1 };
      )
    );
  } catch (e) {
    return res.send(e.message);
  }
});

answered May 5, 2019 at 14:55

James Hibbard

17.8k14 gold badges69 silver badges76 bronze badges

Comments

BIS Tech · Accepted Answer · 2019-05-05 14:52:09Z

-1

Working well

const arr = ["Action", "Comedy", "Documentary", "Drama"];

arr.map((arrElement, index) => ({ label: arrElement, value: index }));

answered May 5, 2019 at 14:52

BIS Tech

19.8k15 gold badges117 silver badges156 bronze badges

1 Comment

James Hibbard Over a year ago

Won't this set the values to 0, 1, 2, 3 instead of 1, 2, 3, 4?

Collectives™ on Stack Overflow

How to modify array on NodeJS

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related