Function

sum (dependentKey) ComputedProperty public

Module:	@ember/object

Defined in packages/@ember/object/lib/computed/reduce_computed_macros.js:56

Available since v1.4.0

import { sum } from '@ember/object/computed';

dependentKey

String

returns

ComputedProperty

computes the sum of all values in the dependentKey's array

A computed property that returns the sum of the values in the dependent array.

Example:

import { sum } from '@ember/object/computed';

class Invoice {
  lineItems = [1.00, 2.50, 9.99];

  @sum('lineItems') total;
}

let invoice = new Invoice();

invoice.total; // 13.49

Classic Class Example:

import EmberObject from '@ember/object';
import { sum } from '@ember/object/computed';

let Invoice = EmberObject.extend({
  lineItems: [1.00, 2.50, 9.99],

  total: sum('lineItems')
})

let invoice = Invoice.create();

invoice.total; // 13.49