Challenges arise when trying to use multiple loops to add elements to an array

I am currently working with Angular/Typescript and utilizing the amcharts library version 4, specifically focusing on the multi line graph feature. When constructing the chart data, I have noticed that it only functions correctly with a single push to the chart array.

Here is an example of my code:

chart.data = [];

        let hvacData: any = '';
        for (let i = 0; i < this.chartTradeData['HVAC'].length; i++) {
          const newDate = new Date(this.chartTradeData['HVAC'][i]['calendarDate']);
          hvacData = this.chartTradeData['HVAC'][i]['revWorkDay'];
          hvacData = parseInt(hvacData);
          chart.data.push({
            date: newDate,
            hvacData
          });
        }

        let plumbingData: any = '';
        for (let i = 0; i < this.chartTradeData['Plumbing'].length; i++) {
          const newDate = new Date(this.chartTradeData['Plumbing'][i]['calendarDate']);
          plumbingData = this.chartTradeData['Plumbing'][i]['revWorkDay'];
          plumbingData = parseInt(plumbingData);
          chart.data.push({
            date: newDate,
            plumbingData
          });
        }

        let electricalData: any = '';
        for (let i = 0; i < this.chartTradeData['Electrical'].length; i++) {
          const newDate = new Date(this.chartTradeData['Electrical'][i]['calendarDate']);
          electricalData = this.chartTradeData['Electrical'][i]['revWorkDay'];
          electricalData = parseInt(electricalData);
          chart.data.push({
            date: newDate,
            electricalData
          });
        }

The issue is that the method above only displays the first line on the graph. My goal is to find a way to perform all these pushes simultaneously, resulting in a combined output like this after the loops:

  chart.data.push({
        date: newDate,
        hvacData,
        plumbingData,
        electricalData
      });
    }

The structure of the object I am iterating over is shown here:

https://i.sstatic.net/2HoUW.png

Answer №1

For optimal results, it is advised to utilize the addData method:

chart.addData([...]);

I suggest adding arrays containing all data instead of individual items one by one for efficiency.

Explore more on incremental updates for further insights.

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