What is the best way to replicate certain key-value pairs in an array of objects?

I am working with an array of objects.

resources=[{name:'x', title:'xx',..},{name:'y',title:'yy',..}..]

To populate my HTML tooltip, I am pushing all the titles from the resources array to a new array.

dialogOkClick(field) {

  this.resources.forEach((res) => {
    if(this.selectedItems.indexOf(res.title) === -1) {
      this.selectedItems.push(res.title);
      this.tooltipText = this.selectedItems.join(', ');
    }
  });

}

The process of pushing individual items to a new array is causing inconsistency between the two arrays. Is there a way to clone all the titles to a new array simultaneously instead of pushing each item one by one?

Thank You!

arraysangulartypescript

Answer №1

In this scenario, the focus is on utilizing Javascript rather than Angular for achieving the desired outcome...

An effective approach is to leverage the map function provided by Arrays in Javascript. This technique involves generating a new value for each element within the original array.

let titles = resources.map(obj => obj.title);

By employing this method, all titles from the resources array will be consolidated into the titles array.

Furthermore, it is recommended to extract the join operation from the foreach loop. Essentially, conducting the join process once per item in the resources array is a more efficient practice.

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