score:2
Disclaimer: I wrote this library
You could use the javascript loq library to achieve this. Here's a snippet to get you on your way:
var list = [
{name:"dog",type:"animal"},
{name:"cat",type:"animal"},
{name:"snake",type:"animal"},
{name:"table",type:"furniture"},
{name:"chair",type:"furniture"},
];
var filtered = loq(list).distinctBy(item => item.type);
console.log(filtered.toArray());<script src="https://cdn.rawgit.com/biggyspender/loq/67db7014/lib/loq.min.js"></script>...or with requirejs
requirejs.config({
paths: {
loq: 'https://cdn.rawgit.com/biggyspender/loq/67db7014/lib/loq.min'
}
});
require(['loq'], function(loq){
var list = [
{name:"dog",type:"animal"},
{name:"cat",type:"animal"},
{name:"snake",type:"animal"},
{name:"table",type:"furniture"},
{name:"chair",type:"furniture"},
];
var filtered = loq(list).distinctBy(item => item.type);
console.log(filtered.toArray());
});<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.1.14/require.js"></script>It's a relatively complete reimplementation of LINQ-to-objects on iterables (objects that implement Symbol.iterator) with a few extra goodies (such as distinctBy). Take a look at the tests to see other uses.
Source: stackoverflow.com
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