How to read a json with a string "2012-12-13" as its key in javascript?

Question

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How to access a numeric property?

I write a page to access a api from other website. it passes a json in the format of

{
    "a": {
        "2013-01-03": 3965,
        "total": 52284,
        "2013-01-05": 2636,
        "2013-01-04": 4086
    },
    "b": {
        "2013-01-03": 1969,
        "total": 25594,
        "2013-01-05": 1852,
        "2013-01-04": 2031
    },
    "c": {
        "2013-01-03": 6,
        "total": 443,
        "2013-01-05": 13,
        "2013-01-04": 19
    }
}

in my page, i try to access, for example data.a.total it will return 52284, but i cannot access data.a.2013-01-03, it will create an error. It seems that numbers cannot be the key for json. Can someone tell me whats the solution? thanks

score 2 · Accepted Answer · answered Jan 05 '13 at 11:00

You can read it as a['2012-12-13'] using the [] notation for accessing named properties.

For ex:

var data = {"a": {"2013-01-03": 3965, "total": 52284, "2013-01-05": 2636, "2013-01-04": 4086}, "b": {"2013-01-03": 1969, "total": 25594, "2013-01-05": 1852, "2013-01-04": 2031}, "c": {"2013-01-03": 6, "total": 443, "2013-01-05": 13, "2013-01-04": 19}};

data.a['2013-01-03'] will give you 3965

score 1 · Answer 2 · answered Jan 05 '13 at 11:02

1

Use the square bracket notation if the keys contain characters that are not valid as JavaScript identifiers:

json.a["2013-01-03"] // 3965

answered Jan 05 '13 at 11:02

Salman A

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How to read a json with a string "2012-12-13" as its key in javascript?

2 Answers2