JavaScript Reduce array with lodash and specific condition reduce array with one element,reduce array with objects,array_reduce

I'd like to reduce my array of objects using lodash.

My object:

[
    {date: '01/01/2016', price: 5},
    {date: '01/01/2016', price: 10},
    {date: '01/02/2016', price: 500}
]

After the reduce:

[
    {date: '01/01/2016', price: 15},
    {date: '01/02/2016', price: 500}
]

The main goal is to check if there is identical dates and accumulate the price into a simple object...

Answer:1

Using a lodash chain:

var results = _(data).groupBy('date').map(function(v, k) {
  return { date : k, price : _.sum(v, 'price') };
}).value();
Answer:2

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