Get parent array key in deep nested object using lodash

Question

I'm using Lodash JavaScript library in my project and have a problem in getting the parent array key object filtered object:

I've the following data:

var data = {
 5: [{
  id: "3",
  label: "Manish"
 }, {
  id: "6",
  label: "Rahul"
 }, {
  id: "7",
  label: "Vikash"
 }],
 8: [{
  id: "16",
  label: "Pankaj"
 }, {
  id: "45",
  label: "Akash"
 }],
 9: [{
  id: "15",
  label: "Sunil"
 }]
}

My requirement is if I've the array of [6,16] then I want a new result array containing values 5,8 because these two array keys have objects which contain id:"6" and id:"16"

I tried it using _.flatten and _.pick method but could not work. I used the following code;

var list = [];
_.each(data, function(item){
    list.push(_.omit(item, 'id'));
    list.push(_.flatten(_.pick(item, 'id')));
});
var result = _.flatten(list);
console.log(result);

Can jquery solution be accepted?

Rajshekar Reddy
– Rajshekar Reddy

2016-02-26 10:24:24 +00:00
Commented Feb 26, 2016 at 10:24 — Rajshekar Reddy
– Rajshekar Reddy, Commented Feb 26, 2016 at 10:24

stasovlas · Accepted Answer · 2016-02-26 12:20:35Z

1

var res = _([6, 16]).map(function(id){
    return _.findKey(data, function(arr){
        return _.some(arr, {id: new String(id)});
    })
}).compact().uniq().value();

answered Feb 26, 2016 at 12:20

stasovlas

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Comments

gurvinder372 · Accepted Answer · 2016-02-26 10:26:02Z

0

If simple javascript solution is okay with you then

var searchId=[6,16];  
var newArr = []; 
for ( key in data ){
   data[key].forEach( function(innerValue){
      if ( searchId.indexOf( Number(innerValue.id) ) != -1 ) newArr.push( key );
   } ); 
}

console.log(newArr);

answered Feb 26, 2016 at 10:26

gurvinder372

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4 Comments

Manish Jangir Over a year ago

Its fine but does lodash not provide any short solution for it?

gurvinder372 Over a year ago

@ManishJangirBlogaddition.com sorry, I have not worked on lodash. If no one else provide you with a lodash solution (since you posted more than 15 min ago) then you can use mine.

Manish Jangir Over a year ago

Hi, why it is not working if searchId = $('#multiselect-dropdown').val();

gurvinder372 Over a year ago

not sure, what is the output of $('#multiselect-dropdown').val();

Vanojx1 · Accepted Answer · 2016-02-26 10:37:09Z

0

try this:

( hope im not missing some syntax )

var result = [];
var filterArray = [6,16];
_.each(filterArray, function(item){   
 _.merge(result,_.filter(data, function(o) { return _.contains(o,{id:item}) }));
});

answered Feb 26, 2016 at 10:37

Vanojx1

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1 Comment

Manish Jangir Over a year ago

TypeError: _.contains is not a function

Mikhail Shabrikov · Accepted Answer · 2016-02-26 20:27:02Z

0

Using _.pickBy this problem is solved simply:

var myArr = [6, 16]

var res = _.pickBy(data, function (value) {
    return _(value).map('id').map(_.toNumber).intersection(myArr).size();
});

console.log(res)

https://jsfiddle.net/7s4s7h3w/

answered Feb 26, 2016 at 20:27

Mikhail Shabrikov

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