From an array of objects, extract one property and build a string with them

Question

The way I'm doing it is to save that properties into an array and after that to join them.

Original array of objects:

const objArray = [ { prop: "a", etc: 1}, { prop: "b", etc: 2}, { prop: "c", etc: 3} ];

First step, save the values of property prop into an array:

const firstStep = objArray.map(a => a.prop);

Second step, concatenate them into a string:

const secondStep = firstStep.join(' + ');

This works fine but I'm thinking if there is a better/shorter method to do this. Any ideas?

CertainPerformance · Accepted Answer · 2020-04-24 09:48:49Z

1

It isn't much, but you can chain the operations together, there's no need to save the intermediate result in a variable first:

const result = objArray
  .map(a => a.prop)
  .join(' + ');

const objArray = [ { prop: "a", etc: 1}, { prop: "b", etc: 2}, { prop: "c", etc: 3} ];
const result = objArray
  .map(a => a.prop)
  .join(' + ');
console.log(result);

Other than that, I don't think it's possible to implement the logic in a shorter fashion.

answered Apr 24, 2020 at 9:48

CertainPerformance

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