Adding an empty object between each line in a typescript array-CodePudding

I'm creating an iterator with the .map() function like so:

var csv = this.invoices
  .map(x => ({
    invoiceId: x.invoiceId,
    invoiceDate: x.invoiceDate,
    invoiceType: x.invoiceType,
    amount: x.subtotal,
  }));

I'm going to be exporting this array to a CSV, and need to have a blank line between items. The CSV helper doesn't do this, so how do I add in an empty object between each item in my csv array?

CodePudding user response：

One option would be to flatMap instead of map, and add an empty object to the front or back of the array, then pop or shift accordingly.

var csv = this.invoices
  .flatMap(x => [
    {},
    {
      invoiceId: x.invoiceId,
      invoiceDate: x.invoiceDate,
      invoiceType: x.invoiceType,
      amount: x.subtotal,
    }
  ]);
csv.shift();