Accessing an object inside of an array inside of an object in javascript

Question

I'm trying to write a function that accesses an object inside of an array inside of an object and then push that into an array.

This is the code I have right now:

Javascript

stuff: function (index1, index2) {
    for (var i = 1; i < index1.length; i++) {
        state[index2].push(foodData[index1][i].name);
    }
}

When I run storage.stuff('ingredientsToInclude', 'desired') I get the following error:

Cannot read property 'name' of undefined

However, if I access foodData["ingredientsToInclude"][1].name in the console it returns the correct value.

Not sure the reason for the discrepancy.

What is index1? Why are you using its length property as the limit for the for loop? Shouldn't that be fooData[index1].length? — Pointy
– Pointy, Commented Aug 17, 2015 at 19:50
The variable i iterates index1, so you probably want index1[i] somewhere. Try foodData[index1[i]] instead of foodData[index1][i] — Oriol
– Oriol, Commented Aug 17, 2015 at 19:51
change for (var i = 1; i < index1.length; i++) { to for (var i = 1; i < foodData[index1].length; i++) { — Amit.rk3
– Amit.rk3, Commented Aug 17, 2015 at 19:53
@Amit.rk3 - This worked. If you make it an answer I'll mark the question as complete. — Jonathan Bechtel
– Jonathan Bechtel, Commented Aug 17, 2015 at 20:27

Amit.rk3 · Accepted Answer · 2015-08-17 20:30:24Z

1

you are looping over string 'ingredientsToInclude' instead of actual array foodData['ingredientsToInclude']. So change for (var i = 1; i < index1.length; i++) { to for (var i = 1; i < foodData[index1].length; i++) {

answered Aug 17, 2015 at 20:30

Amit.rk3

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