Assign a value to JSON with switch statement

Question

My JSON:

var someObj= {
    "1234": {
      "prop1": "prop1value",
      "prop2": "prop2value",
      "prop3": [ 
        "key1", 
        "key2" 
      ]
    }
}

I want to assign a new value to prop1.

Since I've got some more entries in that object I wanted to do it with switch statement by using a proper case number (1234 in this case). I get to 1234 by:

function funct(id, prop, value) {
  switch (id) {
    case 1234:
        someObj["1234"].prop = value;
        break;
  }

  return(someObj);
}
funct(1234, prop1, "just something else")
}

So the function goes to object 1234 and.. adds a whole new property prop1 with "just something else" assigned. I wanted it to assign value to prop1. I thought that stating someObj["1234"].prop would make it go to someOjb["1234"] and choose specified .prop (means prop1 in object)

How to make it work?

Hope you get what I mean!

Are you sure it created a new property `prop1`? It should have created a new property named `.prop`. — Barmar, Sep 14 '16 at 19:47
[JSON](https://en.wikipedia.org/wiki/JSON), what you have there is a plain old Javascript object. — Xotic750, Sep 14 '16 at 19:56

score 0 · Answer 1 · answered Sep 14 '16 at 19:45

0

someOjb["1234"][prop], assuming prop is the name of that field

answered Sep 14 '16 at 19:45

holtc

1,780
3
16
35

score 0 · Answer 2 · answered Sep 14 '16 at 19:45

0

The property is "prop1", not .prop. You need to use square brackets when using dynamic properties:

someObj["1234"][prop] = value;

answered Sep 14 '16 at 19:45

Rob M.

35,491
6
51
50

score 0 · Accepted Answer · answered Sep 14 '16 at 19:45

0

Like this:

someObj["1234"][prop] = value;

answered Sep 14 '16 at 19:45

Sergiu

1,206
7
9

That helped! Thanks everybody! – WTob Sep 14 '16 at 20:06

Assign a value to JSON with switch statement

3 Answers3