Question

114

lodash/underscore; compare two objects and remove duplicates

rated 0 times [ 115] [ 1] / answers: 1 / hits: 16183 / 9 Years ago, wed, march 4, 2015, 12:00:00

As you can see in the image below, I have some returned json data with three objects; each contains a clients id => data.

Returned

exact_match : {104}

match_4 :  {104, 103}

match_2 :  {104, 103, 68}

How can I trim or remove the duplicate objects based on previous ones? something like:

exact_match : {104}

match_4 :  {103}

match_2 :  {68}

I tried _.difference but did not work (Maybe because it is for arrays not objects?):

var exact_match = data.exact_match,

    match_four_digits = _.difference(data.match_4, data.exact_match),

    match_two_digits = _.difference(data.match_2, data.exact_match, data.match_4),

Any help would be appreciated :)

Update

I need that the returned value has the same object data instead of a new array :)

Answers

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felix

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4 Years ago

answered 9 Years ago devonw · Accepted Answer

Thanks guys for the answers, I really appreciate your time.

I searched further and found this post by Lodash developer that helped me came up with this snippet;

var data = {

  exact_match: {

    104: {

      supplier_id: 104

    }

  },

  match_four_digits: {

    104: {

      supplier_id: 104

    },

    68: {

      supplier_id: 68

    }

  },

  match_two_digits: {

    104: {

      supplier_id: 104

    },

    68: {

      supplier_id: 68

    },

    103: {

      supplier_id: 103

    },

    999: {

      supplier_id: 999

    }

  }

};



var arr_match_four_digits = _.difference(_.keys(data.match_four_digits), _.keys(data.exact_match));

var arr_match_two_digits = _.difference(_.keys(data.match_two_digits), _.keys(data.match_four_digits), _.keys(data.exact_match));







$('#output1').html(JSON.stringify(data));

$('#output2').html(JSON.stringify(_.pick(data.match_four_digits, arr_match_four_digits)));

$('#output3').html(JSON.stringify(_.pick(data.match_two_digits, arr_match_two_digits)));

<script src=https://cdn.rawgit.com/lodash/lodash/3.3.1/lodash.min.js></script>

<script src=https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js></script>



data

<pre><code><div id=output1></div></code></pre>

arr_match_four_digits

<pre><code><div id=output2></div></code></pre>

match_two_digits

<pre><code><div id=output3></div></code></pre>