get uniq [key,value] from object array with lodash

Question

I have an object array, products, with properties "categoryid, categoryname, name, price". I want to return an object array with just "categoryid, categoryname" from this but since categoryid exist multiple times, I want only the unique results.

I can get both fields with this code but it won't be unique.

_.map(products, _.partialRight(_.pick, ['categoryid', 'category']))

How can I make this unique?

Would you be okay with JS only solution or Lodash is a must? — gurvinder372
– gurvinder372, Commented May 6, 2016 at 6:17
As @gurvinder372 mentioned you can get the unique values first and then map them out. _(products).uniqBy('categoryId').map(_.partialRight(_.pick, ['categoryid', 'categroyname'])).value() — ryeballar
– ryeballar, Commented May 6, 2016 at 6:32

nurp · Accepted Answer · 2016-05-06 08:31:16Z

2

I could do it in two separate lines:

var uniq = _.uniqBy(vm.productList, 'categoryid');
vm.categories = _.map(uniq, _.partialRight(_.pick, ['categoryid', 'category']))

answered May 6, 2016 at 8:31

nurp

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