Access JSON data through variable .-string interpolation

Question

Trying to access integer stored under id's/keys in json object. Why doesn't this code work on its own?

 var rooms = {
    'kitchen': [7, 40, 36, 16],
    'livingroom': 31,
    'livingroom2': 15,
    'livingroom3': 38,
    'gallery': 35,
    'gallery2': 29,
    'gallery3': 12,
    'office': [22, 32],
    'neekonsbedroom': 18,
    'homeworkroom': 33,
    'diningroom': 13,
    'atrium': 11
}
function switchOne(id) {
    console.log(rooms.id)
}
 switchOne('office')

console.log() returns undefined, but simply console.log(rooms.office) returns [ 22, 32 ] Any and all help is greatly appreciated! Happy coding!

Possible duplicate of [JavaScript object: access variable property by name as string](https://stackoverflow.com/questions/4255472/javascript-object-access-variable-property-by-name-as-string) — Ivan Ivanov, Nov 15 '17 at 09:20
Possible duplicate of [Dynamically access object property using variable](https://stackoverflow.com/questions/4244896/dynamically-access-object-property-using-variable) — Mark Ormesher, Nov 16 '17 at 08:36

score 6 · Accepted Answer · answered Nov 15 '17 at 07:10

You're looking for the literal key "id" within your object, not the key at the value of id (i.e. "office"). To get Javascript to treat id as a variable you need to use rooms[id].

The information here explains (towards the bottom) accessing properties of objects: https://www.w3schools.com/js/js_object_definition.asp.

score 3 · Answer 2 · answered Nov 15 '17 at 07:18

3

You should try this way object[key]

answered Nov 15 '17 at 07:18

mohsin

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Access JSON data through variable .-string interpolation

2 Answers2