How to insert multiple values to single key in javascript

debugcn Published at Dev

krishna

I have an object array var codropsEvents={[date1]:['event1'],[date2]:['event2'}; I want to insert multiple values to event1 i.e {[date1]:['event1','event2'],..} I use the following code

<?php 
    $da=[];
    $qry="select * from events";
    $ex=mysqli_query($con,$qry);
    while($row=mysqli_fetch_assoc($ex))
    {
        $timestamp = strtotime($row['date']);
        $date= date('m-d-Y', $timestamp);
        $event=$row['event'];
        $da[]=$date;

        $eve[]=$event;


    }
    ?>
<script type="text/javascript">
        var a=<?php echo(json_encode($da)); ?>;
        var ev=  <?php echo(json_encode($eve)); ?>;
        var codropsEvents ={};
        for(var i=0;i<a.length;i++)
        {

            codropsEvents[a[i]] = '<span>'+[ev[i]]+'</span>';

        }

        </script>

But using this code I got something like this,

var codropsEvents={[date1]:[event1],[date1]:[event2]}

But I need all events with same date in a single key is {[date1]:['event1','event2',..],[date2]:[''event3','event4'..],..};

Please anyone can help me

Kamalakannan J

You need to check whether the key exists in the object, if not initialize it with empty array. Then push elements into the array.

<script type="text/javascript">
    var a=<?php echo(json_encode($da)); ?>;
    var ev=  <?php echo(json_encode($eve)); ?>;
    var codropsEvents ={};
    for(var i=0;i<a.length;i++)
    {

        if (!codropsEvents[a[i]]) {
            codropsEvents[a[i]] = [];
        }
        codropsEvents[a[i]].push('<span>'+[ev[i]]+'</span>');

    }

</script>

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