Array support

[petermorlion]

Would you be interested in a PR for array support?

Say we have this object:

{
    name: "Peter",
    familyName: "Morlion",
    hobbies: [{
        name: "Reading",
        since: 1989
    }, {
        name: "Games",
        since: 1994
    }]
}

If I want to filter with ["name", "hobbies.name"] I'll get:

{
    name: "Peter"
}

It would be nice to get:

{
    name: "Peter",
    hobbies: [{
        name: "Reading"
    }, {
        name: "Games"
    }]
}

[doowb]

A PR would be great!

I think it will require updating stringify-keys in glob-object to the latest version first to ensure the array keys are referenced correctly.
Then some other updates to glob-object may be required for "rebuilding" the returned object.

I tried with the following code with the latest versions of micromatch and stringify-keys, and it seems to get the correct keys:

'use strict';

const mm = require('micromatch');
const stringify = require('stringify-keys');

const obj = {
  name: 'Peter',
  familyName: 'Morlion',
  hobbies: [{
    name: 'Reading',
    since: 1989
  }, {
    name: 'Games',
    since: 1994
  }]
};

const keys = stringify(obj, '/');
const patterns = ['name', 'hobbies/*/name'];
const matches = mm(keys, patterns);
console.log(matches);

All keys
[
  'name',
  'familyName',
  'hobbies/0/name',
  'hobbies/0/since',
  'hobbies/1/name',
  'hobbies/1/since'
]

patterns
[ 'name', 'hobbies/*/name' ]

matches
[ 'name', 'hobbies/0/name', 'hobbies/1/name' ]

[petermorlion]

I had a deeper look and think the solution lies in the set-value library. In glob-object, we have keys like a.0.b, a.1.b, etc. The numbers indicate indexes in arrays. We then call the set function with these keys. So I created a PR that I think should fix this (instead of creating objects with numbers as keys): jonschlinkert/set-value#26.

If you're OK with that PR and it's merged, I can update glob-object and then filter-object to incorporate these changes :)