Javascript - get object value using variable

Question

I'm trying to get an object value by passing a variable to a function, but I'm not sure how to do this with a multi layer object. It looks like this:

var obj = {
  field1: { name: "first" },
  field2: { name: "second" }
};

var test = function(field){
  //sorting function using obj[field]
  //return results
};

With the above, the following works:

var result = test("field1");

This sorts using the object {name: "first"} but say I want to use just the name value. I can't do this:

var result = test("field1.name");

What is the correct way to do this?

@Ramanlfc Yes I'm well aware of that. Hence why I said it doesn't work and am asking what is the correct way to do this. — CaribouCode
– CaribouCode, Commented Nov 25, 2015 at 11:02
Is this what you want to achieve? stackoverflow.com/questions/6491463/… — thmshd
– thmshd, Commented Nov 25, 2015 at 11:08
Possible duplicate of Convert string in dot notation to get the object reference — Andy
– Andy, Commented Nov 25, 2015 at 11:10

Alexander_F · Accepted Answer · 2015-11-25 11:02:36Z

1

what about this?

var result = test("field1", "name");

var test = function(field, keyname){
  return obj[field][keyname];
};

answered Nov 25, 2015 at 11:02

Alexander_F

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2 Comments

CaribouCode Over a year ago

Yes this will work, except what if the object had more layers and I wanted to use the function to target any layer of the object?

Alexander_F Over a year ago

in this case you can write a function and work with "arguments" w3schools.com/js/js_function_parameters.asp javascript allowing you to pass N number on parameters to the function

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