Multidimensional array check for undefined keys

Asked Mar 08 '16 at 17:56

Active Mar 08 '16 at 18:05

Viewed 34 times

I have the following array generated by PHP:

{
    "101265" : {
        "1" : {
            "1" : 165,
            "2" : 120
        },
        "2" : {
            "10" : 5
        }
    },
    "101382" : {
        "1" : {
            "1" : 810,
            "2" : 120
        }
    },
    "101388" : {
        "1" : {
            "13" : 240
        }
    },
    "101449" : {
        "70" : {
            "127" : 30
        }
    }
}

In order for me to avoid undefined variable error when trying to access totalTimePerRate[ticketId][serviceId][serviceRateId]

I have to use the following checks:

var totalTime = (typeof totalTimePerRate[ticketId] !== 'undefined') ? (typeof totalTimePerRate[ticketId][serviceId] !== 'undefined') ? (typeof totalTimePerRate[ticketId][serviceId][serviceRateId] !== 'undefined') ? totalTimePerRate[ticketId][serviceId][serviceRateId] : false : false : false;

Otherwise it will throw an error if such ticketId, serviceId or serviceRateId not found.

Could you please advise on how to minimize the code of such checks?

Thanks.

edited Mar 08 '16 at 18:05

asked Mar 08 '16 at 17:56

Alex G

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Please post JSON-formatted not PHP-formatted sample objects to JavaScript questions. – Bergi Mar 08 '16 at 17:59
@Bergi: I looked at that question before I posted, this is not my case. – Alex G Mar 08 '16 at 18:04
Can you elaborate how your case is any different? – Bergi Mar 08 '16 at 18:05
Just realized that I'm actually using objects... In my other script I use array, but this should work for this case.. =) – Alex G Mar 08 '16 at 18:14

Multidimensional array check for undefined keys

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