Compare Array value with Object key and set the value to array

Question

I've an array and an object. I should compare the Array value with the object key. If both are matches, I should push the value of object into the array.

I've achieve this with the below logic.

  var arr = [{ "name": "Coal", "segmentId": null }, { "name": "Ash", "segmentId": null }];

    var obj = {
        "Ash": {
            "October 2015": "66",
            "segmentId": "66",
            "December 2015": "435",
            "November 2015": "34535"
        },
        "Coal": {
            "October 2015": "23455",
            "segmentId": "66",
            "November 2015": "3454",
            "December 2015": "345"
        }
    };

    document.writeln("Original Array : " + JSON.stringify(arr));

    for (var i = 0; i < arr.length; i++) {
        var keys = Object.keys(obj);
        for (var j = 0; j < keys.length; j++) {
            if (arr[i].name === keys[j]) {
                arr[i].segmentId = obj[keys[j]].segmentId;
            }
        }
    }

    document.writeln("Transformed Array : " + JSON.stringify(arr));

I would like to know, Is there any other best way to handle this or any js library to make it simple?

Fiddler Version

@ergonaut can you name the underscorejs api name to handle this. — Premkumar
– Premkumar, Commented Sep 29, 2015 at 14:21

Paul Booblick · Accepted Answer · 2015-09-29 14:21:52Z

2

try this with javascript higher order functions:

arr.map(function(item){
  item["segmentId"] = obj[item["name"]]["segmentId"]
});

edited Sep 29, 2015 at 14:21

user663031

answered Sep 29, 2015 at 13:15

Paul Booblick

3651 silver badge7 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

forgottofly Over a year ago

Am getting two objects as undefined

user2118542 · Accepted Answer · 2015-09-29 13:52:18Z

0

Although you have not provided a fiddle.But you can do it in jquery like below:

Please note I am creating a new array for the result set.

var arr = [{ "name": "Coal", "segmentId": null }, { "name": "Ash", "segmentId": null }];
var obj = {
        "Ash": {
            "October 2015": "66",
            "segmentId": "66",
            "December 2015": "435",
            "November 2015": "34535"
        },
        "Coal": {
            "October 2015": "23455",
            "segmentId": "69",
            "November 2015": "3454",
            "December 2015": "345"
        }
    };

var a=[];  
$.each(arr, function(i, v) { 
    $.each(obj, function(oi, ov) {    
        if(arr[i].name==oi)             
             a.push(obj[oi].segmentId);           
    });
});


alert(a.length);

answered Sep 29, 2015 at 13:52

user2118542

2 Comments

user663031 Over a year ago

Why would I use jQuery for a plain old loop?

user2118542 Over a year ago

Hi @torazaburo OP has mentioned best way or any js library.So I think he is open to jquery.He is looking for best way.I have shown him one of the way.Of course it can be further reduced down to one liner.But I dont have much time now to spend time on this.Will look later

Collectives™ on Stack Overflow

Compare Array value with Object key and set the value to array

2 Answers 2

1 Comment

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related