CODEWITHSUNDEEP
javascriptjsonnode.jsobjectlodash
Bwizard
Bwizard

Reputation: 1023

Lodash filter out rougue items from object

I am creating an object from a json file events.json using lodash map and uniqby.

Very rarely I get an event that has a country other than "United Kingdom". I don't need them in the results, how would I go about 'not mapping' the events that are not in the "United Kingdom". Thanks

var _ = require('lodash');
var data = require('./events.json')

var newEventList = _.uniqBy(data.events,'id').map(events => ({
    id: events.id ,
    name: events.name ,
    venue: events.venue.name ,
    address: events.place.location.street + " " + events.place.location.city + " " + events.place.location.zip + " " + events.place.location.country
}));

I have looked at _.filter but am not sure of where to use it within the map function.

Upvotes: 0

Views: 30

Answers (1)

Artsiom Tymchanka
Artsiom Tymchanka

Reputation: 527

You can use filter before or after map. But before map it will be more useful. 

var newEventList = _.uniqBy(data.events,'id').filter(event => event.place.location.country === 'United Kingdom').map(event => ({
    id: event.id ,
    name: event.name ,
    venue: event.venue.name ,
    address: event.place.location.street + " " + event.place.location.city + " " + event.place.location.zip + " " + event.place.location.country
}));

But the question is why you need uniq by id? Usually id is a property that should be uniq

Upvotes: 2

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