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, Nov 25 '15 at 11:02
Is this what you want to achieve? http://stackoverflow.com/questions/6491463/accessing-nested-javascript-objects-with-string-key — thmshd, Nov 25 '15 at 11:08
Possible duplicate of [Convert string in dot notation to get the object reference](http://stackoverflow.com/questions/10934664/convert-string-in-dot-notation-to-get-the-object-reference) — Andy, Nov 25 '15 at 11:10

score 1 · Accepted Answer · answered Nov 25 '15 at 11:02

1

what about this?

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

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

answered Nov 25 '15 at 11:02

Alexander_F

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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? – CaribouCode Nov 25 '15 at 11:06
in this case you can write a function and work with "arguments" http://www.w3schools.com/js/js_function_parameters.asp javascript allowing you to pass N number on parameters to the function – Alexander_F Nov 25 '15 at 11:08

Javascript - get object value using variable

1 Answers1