Array duplicate object while pushing object

Question

When I am trying to push object on the array its duplicate all the object to the last pushed object.

 var seriesArr = [];
 var seriesDemo = {};

 var seriesFinal = finalArr[0]

 for (var o in finalArr[0]) {
    seriesDemo.valueField = o;
    seriesArr.push(seriesDemo);
 }

OUTPUT:

[{"valueField":"amount[3]"},{"valueField":"amount[3]"},{"valueField":"amount[3]"},{"valueField":"amount[3]"}]

It should be like: [{"valueField":"amount[0]"},{"valueField":"amount[1]"},{"valueField":"amount[2]"},{"valueField":"amount[3]"}]

forget about seriesDemo object and do like seriesArr.push({valueField:o}); — Redu
– Redu, Commented Jun 8, 2016 at 7:11

phreakv6 · Accepted Answer · 2016-06-08 06:40:30Z

4

Maybe you are looking for this?

for (var o in finalArr[0]) {
   var seriesDemo = {}; // (Re-)Initialize here
   seriesDemo.valueField = o;
   seriesArr.push(seriesDemo);
}

The problem is that you are updating the global seriesDemo hash everytime and it is pushed into seriesArr by reference. So all entries in seriesArr are holding reference to the last entry.

answered Jun 8, 2016 at 6:40

phreakv6

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