How to map an Array to an Object in Javascript?

Question

I'm using array.map to iterate through DOM elements in nodejs/cheerio.

There is my code:

const $ = cheerio.load(html);
const lis = $("table[id*='sortable-']").find('tr');

const lisy = lis.map((i, li) => {
  var name = $(li).find('td.h-text-left.over-s-only').text();
  var cnt = $(li).text();

  return {
   content: cnt
  }
}).get();

And now, I want to return named objects by "name" variable, but for now, .map returning iterated objects:

0: {"cnt": content}, 1: {"cnt": content}

Insted of this, I want to get objects indexed by every "name" like this:

name: {"cnt": content}, name: {"cnt": content}

Is it possible to name returned object like this?

map returns an array. 0 and 1 are indices of that array. You're trying to create an object with keys nm only? That's simply not possible because object cannot contain duplicate keys. Please define your problem clearly. — 31piy
– 31piy, Commented Aug 24, 2018 at 4:48
nm is variable containing different strings.. It depends of $(li).find('td.h-text-left.over-s-only').text(); I have edited example objects — KrystianK
– KrystianK, Commented Aug 24, 2018 at 4:53
Please accept the answer, which helped you best. SO questions should have an accepted answer. Thx — wuarmin
– wuarmin, Commented Feb 4, 2019 at 12:32

wuarmin · Accepted Answer · 2018-08-24 11:32:34Z

1

You can achieve your goal by using Array.prototype.reduce

var result = lis.reduce(function(map, li) {
    var name = $(li).find('td.h-text-left.over-s-only').text();
    var cnt = $(li).text();
    map[name] = { content: cnt };
    return map;
}, {});

answered Aug 24, 2018 at 11:32

wuarmin

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