Creating variables from array

Question

im really beginner into javascript so I struggle. My problem is - I created objects with constructor with specfic names of objects,

function Food (name, Cal, price, Fat, Carb, Protein, Sugar) {
    this.name = name;
    this.Cal = Cal;
    this.price = price;
    this.Fat = Fat;
    this.Carb = Carb;
    this.Protein = Protein;
    this.Sugar = Sugar;
}


//bul
var bulPs = new Food("Bul"+" "+"Psz",120,3.50,36,80,45,78);
var bulSz = new Food("Bul"+" "+"Sez",140,2.90,34,75,33,68);
var bulBr = new Food("Bul"+" "+"bric",136,2.89,39,67,41,75);
var bulMa = new Food("Bul"+" "+"Man",157,3.20,42,56,36,78);

I have checkboxex, and when I click them i push chosen items (their id into array). Id of inputs are same as objects

Eg var bulMa and the id of this item is "bulMa".

When I try to call object's values with arrays index, it shows undiefined. Can someone tell me whats wrong ? Its because its outside of function fodd? Which part of JS core I should understand to handle those problems. Thanks

var zaz = [];
var inputs = document.getElementsByTagName('input');

for (var i=0; i< inputs.length; i++)
{
    inputs[i].onfocus = function() {
        zaznaczone.push(this.id);
        console.log(zaz);
        console.log(zaz[0].name);
    };
}

Nothing ever gets pushed into zaz.

Lain
– Lain

2016-12-12 21:59:18 +00:00
Commented Dec 12, 2016 at 21:59 — Lain
– Lain, Commented Dec 12, 2016 at 21:59

Heather Sawatsky · Accepted Answer · 2016-12-12 22:02:05Z

1

Your array is called zaz, but you are pushing into zaznaczone.

Also zaz[0].name will be undefined; zaz[0] is the Id of the element and thus the name of your object.

var zaz = [];
var inputs = document.getElementsByTagName('input');

for (var i = 0; i < inputs.length; i++) {
    inputs[i].onfocus = function() {
        zaz.push(this.id);
        console.dir(zaz);
    };
}

answered Dec 12, 2016 at 22:02

Heather Sawatsky

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1 Comment

jskorups Over a year ago

ad . 1. sry, yeah, I changed zaznaczone into zaz, but not in all places

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