Different parent object depending on its undefined children

Asked Jun 14 '16 at 14:58

Active Jun 14 '16 at 14:58

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Let's say we have two objects:

parent1.child
parent2.child

If child is undefined in parent1, I want to use parent2 as parent object (because it'll have the child defined).

Done this way (ES2015):

const conditionalParentObj = (key) => {
  parent1[key] === undefined ? parent2[key] : parent1[key];
}

(Or typeof parent1[key] === 'undefined', whatever)

But how about nested children?

parent2.child.innerchild

Same logic: If innerchild is undefined in parent1, use parent2.

But how can I make it work without using a weird conditional logic like passing an innerKey argument to conditionalParentObj and return like parent2[innerKey][key] if innerKey is passed?

asked Jun 14 '16 at 14:58

Melo

2

May be of interest – [Accessing nested JavaScript objects with string key](https://stackoverflow.com/questions/6491463/accessing-nested-javascript-objects-with-string-key) – Jonathan Lonowski Jun 14 '16 at 15:00
It seems definitely easier that way! – Melo Jun 14 '16 at 15:00

Different parent object depending on its undefined children

But how about nested children?

0 Answers0