Underscore return all objects from nested array

Question

Hi basic question I'm struggling with

var objs = [ {name:'obj_1', evidence:[2] }, {name:'obj_2', evidence[1] } ]

I'd like to return an array of all 3 evidence objects

What I have so far is

_.filter(objs, function(obj) { 
  if (obj.evidence.length > 0) {
    _.each(obj, function(x) { return x }) 
  }
})

McGarnagle · Accepted Answer · 2015-01-03 00:18:42Z

2

You can use _.pluck to reduce the array of objects to an array of a given property:

_.pluck(objs, 'evidence');

[ [2], [1] ]

If you wanted to flatten out the array, you could use "flatten":

_.flatten(_.pluck(objs, 'evidence'));

[2, 1]

answered Jan 3, 2015 at 0:18

McGarnagle

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