How to get object property with counter

Asked Oct 08 '19 at 15:31

Active Oct 08 '19 at 15:31

Viewed 38 times

I am reciving the formValues object, and when I console.log it, I get this result:

attribute_0: "2478"
attribute_1: "2475"
attribute_2: "2480"

What I need is to take those values and store it in a hidden input field, to have something like this:

<input type="hidden" value="2478,2475,2480">

And I could do it, but somehow I can't access this properties in a for loop, so not to do it like:

formValues.attribute_0;
formValues.attribute_1;
formValues.attribute_2;

Because it will be a lot of this attributes, so I need something like:

var attributeValues = '';
for (var i = 0; i < 3; i++) {
   attributeValues += formValues.attribute_{i};
}

var attributeValues = '';
for (var i = 0; i < 3; i++) {
   var text = 'attribute' + i;
   attributeValues += formValues.text;
}

But no. Undefined is what I get :(.If anyone knows how to deal with this kind of stuff, help will be most appreciated.

asked Oct 08 '19 at 15:31

user2450639

Why are they separate properties instead of an array? – Barmar Oct 08 '19 at 15:33
underscore symbol imposes the use of brackets notation – GrafiCode Oct 08 '19 at 15:35
Separate properties are instead of an array because person who created this, thought it will be a good idea for some reason. I don't know who he is, or where can I find him and ask. :) – user2450639 Oct 08 '19 at 15:37
@GrafiCode no, underscore is fine for dot notation `obj.my_property = 1`. It's the dynamic nature of the property name that means it has to be using brackets. – VLAZ Oct 08 '19 at 15:51
Ok I solved it with formValues["attribute_" + i ] – user2450639 Oct 08 '19 at 16:01

0 Answers0