lodash object to array

Question

I am using lodash to find multiple Objects in an Array.

Here's my current Array when I output JSON.stringify(userList):

[
   {"Id":1,"Username":"Usr1","Licenses":["IN","OH"]},
   {"Id":2,"Username":"Usr2","Licenses":["IN","FL"]},
   {"Id":3,"Username":"Usr3","Licenses":["MI"]}
]

I want to find all Loan Officers who have a License in Indiana.

I am using the lodash library and add the following line of code:

var result = _.find(userList, function (o) { return ~o.Licenses.indexOf(state);});

However, this would only return 1 Object, "Id":2 and NOT BOTH Users with Licneses in Indiana.

How can I have _.find() return me ALL Users with a License in "IN"? Perhaps I need to use a different lodash method and thats fine with me.

Also, if only 1 User is returned back to me, like a User with a Florida license, I need it to return the result as an Array, just like so:

[
   {"Id":2,"Username":"Usr2","Licenses":["IN","FL"]}
]

Thank you for your help!

You can't use _.find to do what you want. Read the documentation: lodash.com/docs#find where it says _.find "Iterates over elements of collection, returning the first element" — Dexygen
– Dexygen, Commented May 10, 2016 at 14:04

Venkata Dorisala · Accepted Answer · 2016-05-10 14:04:54Z

1

you can use _.filter - which returns all matched items

answered May 10, 2016 at 14:04

Venkata Dorisala

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Comments

Igor Dymov · Accepted Answer · 2016-05-10 14:05:16Z

0

lodash's method _.filter is a way to go:

Iterates over elements of collection, returning an array of all elements predicate returns truthy for.

_.find returns only first matched element

answered May 10, 2016 at 14:05

Igor Dymov

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Redu · Accepted Answer · 2016-05-10 14:07:07Z

0

You may do as follows. It will get you all objects with searched state. You can search for multiple states as well.

myData = [
          {"Id":1,"Username":"Usr1","Licenses":["IN","OH"]},
          {"Id":2,"Username":"Usr2","Licenses":["IN","FL"]},
          {"Id":3,"Username":"Usr3","Licenses":["MI"]}
         ],
getAll = (...sts) => myData.reduce((p,o) => sts.some( s => o.Licenses.includes(s)) ? p.concat(o) : p ,[]);

document.write("<pre>" + JSON.stringify(getAll("IN"),null,2) + "</pre>");

answered May 10, 2016 at 14:07

Redu

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Comments

Jagdish Idhate · Accepted Answer · 2016-05-10 16:44:26Z

0

You can use array's filter function without using lodash

So one liner would be

var state = 'IN';
var test = [
   {"Id":1,"Username":"Usr1","Licenses":["IN","OH"]},
   {"Id":2,"Username":"Usr2","Licenses":["IN","FL"]},
   {"Id":3,"Username":"Usr3","Licenses":["MI"]}
]

test.filter(x=>x.Licenses.includes(state))

answered May 10, 2016 at 16:44

Jagdish Idhate

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Comments

Rahul · Accepted Answer · 2016-05-14 19:39:08Z

0

There is one more way to do it using chain, filter and includes

var users = [
   {"Id":1,"Username":"Usr1","Licenses":["IN","OH"]},
   {"Id":2,"Username":"Usr2","Licenses":["IN","FL"]},
   {"Id":3,"Username":"Usr3","Licenses":["MI"]}
];

var ret = _.chain(users).filter(function(o){
         return _.includes(o.Licenses,'IN');
    }).value();

console.log(ret);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.12.0/lodash.min.js"></script>

answered May 14, 2016 at 19:39

Rahul

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