logo
down
shadow

Merge objects with same value


Merge objects with same value

By : user2955635
Date : November 22 2020, 10:40 AM
hop of those help? The callback for Array.forEach has the object as the first parameter, not the index. So change to this:
code :
comments.forEach(function(comment) {
    users.forEach(function(user) {
        if (user._id === comment.author) {
            comment.username = user.username;
        }
    });
});
var usersById = {};
users.forEach(function(user) { usersById[user._id] = user; });

comments.forEach(function(comment) {
    var user = usersById[comment.author];
    if (user) {
        comment.username = user.username;
    }
});


Share : facebook icon twitter icon
how to merge multidimensional objects in array without altering the objects inside objects

how to merge multidimensional objects in array without altering the objects inside objects


By : Sinead
Date : March 29 2020, 07:55 AM
Hope this helps Instead of using hard-coded keys, create an array to contain the keys, and check if the object already exists in that array.
This code probably isn't exactly what you're looking for, but should give you an idea of what I'm talking about:
code :
var products = [{
    "Condenser /Heat Pump": {
      "2": 299,
      "starttime": "10/05/17",
      "productClass": "Condenser /Heat Pump"
    }
  },
  {
    "Condenser /Heat Pump": {
      "1": 2529,
      "2": 2270,
      "starttime": "10/06/17",
      "productClass": "Condenser /Heat Pump"
    }
  },
  {
    "Coorporate Coils": {
      "2": 104,
      "3": 216,
      "starttime": "10/05/17",
      "productClass": "Coorporate Coils"
    }
  },
  {
    "Coorporate Coils": {
      "1": 1107,
      "2": 811,
      "3": 0,
      "starttime": "10/06/17",
      "productClass": "Coorporate Coils"
    }
  }
]

var merged = {};
var output = document.getElementById("output")

for (var i = 0; i < products.length; i++ ) {
  Object.getOwnPropertyNames(products[i]).forEach(function(val, idx, array) {
    if (typeof(merged[val]) == "undefined") merged[val] = []
    merged[val].push(products[i][val])
  })
}

output.innerText = JSON.stringify(merged, undefined, 2)
<pre id="output">
</pre>
How to merge two lists of objects into 1 list of objects while also merging the objects

How to merge two lists of objects into 1 list of objects while also merging the objects


By : Marcel Pflug
Date : March 29 2020, 07:55 AM
help you fix your problem You can use array#map and iterate through your question array and by using the index of question array you can add element from your answer array and generate the array of object with both question and answer.
code :
const questions = ["generic question", "generic question 12", "generic question 34"],
      answers = ["generic answer", "generic answer 12", "generic answer 34"];

const merged = questions.map((question, i) => ({question, 'answer' : answers[i]}));
console.log(merged);
.as-console-wrapper { max-height: 100% !important; top: 0; }
If property values of objects are equal in two array of objects then merge those objects into single object

If property values of objects are equal in two array of objects then merge those objects into single object


By : sportsben
Date : March 29 2020, 07:55 AM
I wish this helpful for you You could use the stringified version of theobject to check for duplicates:
code :
const unique = (getKey, s = new Set) => el => !s.has(getKey(el)) && s.add(getKey(el));

const result = data3.concat(data4).filter( unique(el => JSON.stringify(el)) );
How to Merge two json with the different object but not merge the existing objects

How to Merge two json with the different object but not merge the existing objects


By : richolland
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , i have two json which i want to merge them in a way that all new object of 2nd json will add to existing object of 1st json but just new not those item is is already exist. , You can use Set
code :
function customizer(objValue, srcValue) {
    if (_.isArray(objValue)) {
        return objValue.concat(srcValue);
    }
}
var json1 = {
    'a': [
        {'b': 2}
    ]
};

var json2 = {
    'a': [
        {'b': 2},
        {'h': 25}
    ]
};
var a=_.mergeWith(json1, json2, customizer);
console.log(new Set([...a]))
How to merge two lists of objects based on properties and merge duplicates into new object

How to merge two lists of objects based on properties and merge duplicates into new object


By : Murugan Raj
Date : March 29 2020, 07:55 AM
like below fixes the issue This is a two-way comparison of lists, which you can achieve by using Linq's IEnumerable.Except() and IEnumerable.Intersect().
The first thing you should do is to write a class to hold the data items:
code :
sealed class Data
{
    public string Serial { get; }
    public int    Amount { get; }

    public Data(string serial, int amount)
    {
        Serial = serial;
        Amount = amount;
    }
}
sealed class DataComparer : IEqualityComparer<Data>
{
    public bool Equals(Data x, Data y)
    {
        return x.Serial.Equals(y.Serial);
    }

    public int GetHashCode(Data obj)
    {
        return obj.Serial.GetHashCode();
    }
}
enum ComparisonState
{
    Unchanged,
    Changed,
    New,
    Deleted
}

sealed class ComparedData
{
    public Data            Data            { get; }
    public int             PreviousAmount  { get; }
    public ComparisonState ComparisonState { get; }

    public ComparedData(Data data, ComparisonState comparisonState, int previousAmount)
    {
        Data            = data;
        ComparisonState = comparisonState;
        PreviousAmount  = previousAmount;
    }

    public override string ToString()
    {
        if (ComparisonState == ComparisonState.Changed)
            return $"Serial: {Data.Serial}, Amount: {PreviousAmount}, New amount: {Data.Amount}, Status: Changed";
        else
            return $"Serial: {Data.Serial}, Amount: {Data.Amount}, Status: {ComparisonState}";
    }
}
class Program
{
    public static void Main()
    {
        var list1 = new List<Data>
        {
            new Data("63245-8",  10),
            new Data("08657-5", 100),
            new Data("29995-0", 500),
            new Data("12345-0",  42)
        };

        var list2 = new List<Data>
        {
            new Data("63245-8", 100),
            new Data("12345-0",  42),
            new Data("67455-1", 100),
            new Data("44187-10", 50),
        };

        var comparer = new DataComparer();

        var newItems     = list2.Except(list1, comparer);    // The second list without items from the first list = new items.
        var deletedItems = list1.Except(list2, comparer);    // The first list without items from the second list = deleted items.
        var keptItems    = list2.Intersect(list1, comparer); // Items in both lists = kept items (but note: Amount may have changed).

        List<ComparedData> result = new List<ComparedData>();

        result.AddRange(newItems    .Select(item => new ComparedData(item, ComparisonState.New,     0)));
        result.AddRange(deletedItems.Select(item => new ComparedData(item, ComparisonState.Deleted, 0)));

        // For each item in the kept list, determine if it changed by comparing it to the first list.
        // Note that the "list1.Find()` is an O(N) operation making this quite slow.
        // You could speed it up for large collections by putting list1 into a dictionary and looking items up in it -
        // but this is unlikely to be needed for smaller collections.

        result.AddRange(keptItems.Select(item =>
        {
            var previous = list1.Find(other => other.Serial == item.Serial);
            return new ComparedData(item, item.Amount == previous.Amount ? ComparisonState.Unchanged : ComparisonState.Changed, previous.Amount);
        }));

        // Print the result, for illustration.

        foreach (var item in result)
            Console.WriteLine(item);
    }
}
Serial: 67455-1, Amount: 100, Status: New
Serial: 44187-10, Amount: 50, Status: New
Serial: 08657-5, Amount: 100, Status: Deleted
Serial: 29995-0, Amount: 500, Status: Deleted
Serial: 63245-8, Amount: 10, New amount: 100, Status: Changed
Serial: 12345-0, Amount: 42, Status: Unchanged
Related Posts Related Posts :
  • es lint '' is assigned a value but never used' eventhough i have used it
  • Can "name" attribute be used for custom VueJS components
  • Get innerHTML of content when it is clicked
  • HTTPS causes CSS animations to not load? Very confused
  • How to hide other div apart from touched div to the band
  • Is global variable assignment atomic on NodeJS?
  • Datepicker onchangemonthyear beforeshowday
  • trying to render html files using jade but it still adresses it as a jade
  • Google Analytics - Understanding and Dissecting the Snippet: What is | | [ ];
  • Replacing "[aA09.b]." to "[aA09.b]\n" in in JavaScript
  • Why wrap a function definition in an immediate function?
  • Enable / disable jQuery script on switching to different tab in a HTML page
  • how can find return variable value outside anonymous function in node js mysql query function
  • Converting 1 to 0001 in javascript array
  • svg viewbox should not resize the text fontSize?
  • store newline character with string in a variable
  • MP4 videos in Flowplayer does not play in Windows 7 Chrome
  • jquery focusin event not firing
  • How to debug Vue application with google chrome
  • html 5 web app cache download complete javascript alert?
  • Ember.js setupController fired only once
  • How to validate a currency input
  • How to convert my Array of data to key & value pair
  • Statistics circles in CSS
  • So I wanted to make a trig solver in javascript?
  • Showing HighCharts series name on x-axis and in legend
  • In Rails, how can we pass parameters in script?
  • Build Fails: `npm rebuild node-sass --force`
  • Angular Datepicker change dateformat
  • Trying to extract data from between two sets of characters
  • Configuring Jest in WebStorm
  • Uncaught Error: Syntax error, unrecognized expression: tr.ec_portfolio_title,
  • JQuery fading in fading out continuously
  • Unexpected end of input (Line 1) and Undefined Function?
  • How to animate the width of a div slowly with jquery
  • JavaScript + RegEx Complications- Searching Strings Not Containing SubString
  • SignalR - Unable to get property 'client' of undefined or null reference
  • full calendar not displaying when loaded (with backbone)
  • Angular: Update service and share data between controllers
  • ReplaceAll Google script
  • Search for matching LI items in separate UL
  • Access arguments of an... argument
  • Customizing Google custom search jsapi (query strings)
  • React | Can´t load Images > Module not found
  • Dynamically creating buttons in DOJO
  • 404 Not Found in AJAX post call
  • How do I find out, using javascript, what software opened and running my application?
  • Javascript to check the status of wireless connection
  • StarDict support for JavaScript and a Firefox OS App
  • Phonegap event Resume
  • call javascript function on ENTER key press?
  • When is the best time to remove no-js classes from the html tag
  • Recommended email sending languages
  • setInterval not working properly with chrome
  • Does IE create new scope for each script tag?
  • Uncaught SyntaxError: Unexpected token < Underscore and parse issues
  • How to pass captured URL to Email Body in HTML
  • How to structure default nested resources?
  • Store all the keys of a JSON object in a variable
  • Need an efficient way to group the Array of object in javascript
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org