Question

191

Change value in JSON array and return updated array JS

rated 0 times [ 193] [ 2] / answers: 1 / hits: 25267 / 7 Years ago, tue, january 31, 2017, 12:00:00

I've got a JSON object where I get a product price (number) as a value.

What I want is to convert the price values into strings in the existing object

I use map function:

var prods = [

  {

    id: id-1,

    price: 239000,

    info: info-1

  },



  {

    id: id-2,

    price: 90770,

    info: info-2

  },



  {

    id: id-3,

    price: 200787868,

    info: info-3

  },

];





prods.map(function(a) {

         a.price.toString()

        .replace(/(d)(?=(d{3})+(D|$))/g, '$1 ');

})

I expect the map function to update my prods object, but it stays the same.

(Un)working JS Bin

I wonder, how to update the initial object to the one I need?

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2 Years ago

answered 7 Years ago chazw · Accepted Answer

Strings are immutable.

String#replace returns a new string and therefore you need an assignment.

And while you only need to change one property, you could use Array#forEach.

var prods = [{ id: id-1, price: 239000, info: info-1 }, { id: id-2, price: 90770, info: info-2 }, { id: id-3, price: 200787868, info: info-3 }];



prods.forEach(function(a) {

    a.price = a.price.toString().replace(/(d)(?=(d{3})+(D|$))/g, '$1 ');

});



console.log(prods);

.as-console-wrapper { max-height: 100% !important; top: 0; }