问PrimeNG饼图随机显示，并在更改分辨率时显示

EN

// this is not recognized by the change detection mechanism as update because the reference to this.data is not updated
this.resourceService.getResources().subscribe( data => { 
  var counts1 = {};
  this.chartHistory.forEach((x) => {
    counts1[x] = (counts1[x] || 0)+1; 
  });
  for (let i = 0; i < Object.keys(counts1).length; i++) {
    this.chartHistoryData.push(Object.keys(counts1)[i]);
    this.chartHistoryVal.push(Object.values(counts1)[i]);
  }
});

// this would be recognized
this.resourceService.getResources().subscribe( data => { 
  var counts1 = {};
  this.chartHistory.forEach((x) => {
    counts1[x] = (counts1[x] || 0)+1; 
  });
  Object.entries(counts1).forEach(([key, value]) => {
    this.chartHistoryData = [...this.chartHistoryData, key];
    this.chartHistoryVal = [...this.chartHistoryVal, value];
  });
});