Lodash create collection from duplicate object keys

Question

I have the following structure:

var output = [{
    \"article\": \"BlahBlah\",
    \"title\": \"Another blah\"
}, {
    \"article\": \"BlahBlah\",
    \"titl         


        

Answer 1

A better lodash version could be (using the awesome chaining approach)

_(a).groupBy('article').map( (x,k) => ({ article: k, titles:_.map(x, 'title')}) ).value();  

If you want to group by article (so article would be the key, useful for quick lookup)

_(a).groupBy('article').mapValues(x => _.map(x, 'title')).value();