findIndex with two dimensional Array of Objects

Asked Jun 27 '17 at 10:21

Active Jun 27 '17 at 10:34

Viewed 31 times

I need to find the index of a value in an object in a two dimensional array. The array is structured like this:

trips.push({
    station: stationIDs[i],
    stationtrips: ({
        [theid]: station[theid], // This is what I need to find the Index of
        cnt: station.cnt,
        tps: station.tps
    })
})

What I tried so far:

// First Find index of station
stationIndex = trips.findIndex(y => y.station == stationIDs[i]);
// If exists, find index of sub-station
if(stationIndex !== -1) {
    subStationIndex = trips[stationIndex].stationtrips.findIndex(x => x[theid] == station[theid]);

}

I am getting this error:

trips[stationIndex].stationtrips.findIndex is not a function

Question: Does findIndex not work with this structure? What is the proper way to handle this?

-- Update: The console.log of the array (up until it finds a stationindex and then fails at the substationindex):

edited Jun 27 '17 at 10:34

asked Jun 27 '17 at 10:21

ffritz

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The value of `stationtrips` isn't an array. – Quentin Jun 27 '17 at 10:23
The code you show doesn't seem to have the line that is referenced in the error message. – Karl Reid Jun 27 '17 at 10:23
Corrected the error message. – ffritz Jun 27 '17 at 10:25
2

@quentin if we close all questions because *they were answered already here*, we loose the general idea of SO to help people learning to properly write code... ( this is not really an exact duplicate) – Jonas Wilms Jun 27 '17 at 10:26
@Jonasw updated the question. – ffritz Jun 27 '17 at 10:34
@ffritz so theid="eid" ? – Jonas Wilms Jun 27 '17 at 10:37
@Jonasw Correct. It can change, which is why `[theid]` is there. – ffritz Jun 27 '17 at 10:38
@ffritz ok, so you want the station where eid==174 for example? – Jonas Wilms Jun 27 '17 at 10:38
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/147706/discussion-between-ffritz-and-jonas-w). – ffritz Jun 27 '17 at 10:39

findIndex with two dimensional Array of Objects

0 Answers0