How to access properties of a JavaScript object using the property values of another object

Question

Say I have these JavaScript objects:

questions = { name: "Age", options:[boy, girl, daddy]}
answers = {"Age" : 21, "boy" : "checked", daddy : "checked"}

So if I wanted to access the "Age" from the answers object, I would do:

x = answers.Age   //21

But how can I do the same thing but instead using the values from the questions object?

x = answers.questions.name   //problem

or

answers.questions.options[0]  //problem

As you can see I am trying to use the value of questions.name ("Age") to access a property of answers (Age).

What's the right syntax or way?

Tomasz Nurkiewicz · Accepted Answer · 2012-01-04 18:49:03Z

4

Try this:

var x = answers[questions.name]

This works because:

answers.Age

is equivalent to:

answers['Age']

answered Jan 4, 2012 at 18:49

Tomasz Nurkiewicz

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Comments

georg · Accepted Answer · 2012-01-04 18:49:02Z

3

Use indirect referencing

answers[questions.name]

answered Jan 4, 2012 at 18:49

georg

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