logo
down
shadow

Which is the standard in JSON: Objects inside Objects, or Objects inside Array


Which is the standard in JSON: Objects inside Objects, or Objects inside Array

By : user2950799
Date : November 17 2020, 11:58 AM
I wish this help you This is basically your data structure. The only thing that is "accepted" or preferred in data structures is simplicity. However many times it turns out that an API or old code has been written in a way that forces you to use a certain data structure. In your case, the first example suggests that there will not be employees with the same name, which is unacceptable since people with the same names exist and thus your application has a potential weakness. So the second example would be the better choice in that case.
code :


Share : facebook icon twitter icon
How to get the objects inside an array of objects which is inside an document in mongoose/mongodb?

How to get the objects inside an array of objects which is inside an document in mongoose/mongodb?


By : user3591450
Date : March 29 2020, 07:55 AM
it helps some times You could use MongoDB's aggregation framework to get the desired result. The aggregation pipeline would consist of an initial step which has a $match operator that filters the documents based on the criteria above. The next pipeline stage would be the $unwind operator that deconstructs the messages array from the input documents to output a document for each element. A further $match filter then returns only the documents with the participant id. The final step with the $project operator then passes along the documents with only the specified fields to the result:
code :
db.collection.aggregate([
    {
        "$match": {
            "_id" : ObjectId("5548b2b79b9567341c77d352"),
            "messages.participants": ObjectId("5534b2992a104ed914435c31")
        }
    },
    {
        "$unwind": "$messages"
    },
    {
        "$match": {            
            "messages.participants": ObjectId("5534b2992a104ed914435c31")
        }
    },
    {
        "$project": {
            "_id": 0,
            "messages": 1
        }
    }

])
/* 0 */
{
    "result" : [ 
        {
            "messages" : {
                "subject" : "fresh subject ",
                "from" : ObjectId("5534b2992a104ed914435c31"),
                "_id" : ObjectId("5548b5dab9279faf1c1b8688"),
                "created" : ISODate("2015-05-05T12:21:46.261Z"),
                "read" : true,
                "message" : "fresh message ",
                "participants" : [ 
                    ObjectId("5534b2992a104ed914435c31"), 
                    ObjectId("5530af38576214dd3553331c")
                ]
            }
        }
    ],
    "ok" : 1
}
// Using the pipeline builder
Model.aggregate({
        "$match: {
            ""_id" : ObjectId("5548b2b79b9567341c77d352"),
            "messages.participants": ObjectId("5534b2992a104ed914435c31")
        }
    })
    .unwind("messages")
    .match({ "messages.participants": ObjectId("5534b2992a104ed914435c31") })
    .project({
        "_id": 0,
        "messages": 1
    })
    .exec(function (err, res) {
        if (err) return handleError(err);
        console.log(res); 
    });

// Or the simple aggregate method
var pipeline = [
    {
        "$match": {
            "_id" : ObjectId("5548b2b79b9567341c77d352"),
            "messages.participants": ObjectId("5534b2992a104ed914435c31")
        }
    },
    {
        "$unwind": "$messages"
    },
    {
        "$match": {            
            "messages.participants": ObjectId("5534b2992a104ed914435c31")
        }
    },
    {
        "$project": {
            "_id": 0,
            "messages": 1
        }
    }

]

Model.aggregate(pipeline, function (err, res) {
    if (err) return handleError(err);
    console.log(res); 
});
Covert JSON objects inside json objects into a JSON Array in Javascript

Covert JSON objects inside json objects into a JSON Array in Javascript


By : AMDLiquidify
Date : March 29 2020, 07:55 AM
To fix this issue You can use Object.keys(), Array.prototype.reduce() and Array.prototype.map() for iterating over the properties and for assembling the array.
code :
var obj = { "ES": { "130": { "code": "A Coruсa", "name": "A Coruña" }, "131": { "code": "Alava", "name": "Alava" }, }, "CH": { "104": { "code": "AG", "name": "Aargau" } } },
    result = Object.keys(obj).reduce(function (r, k) {
        return r.concat(Object.keys(obj[k]).map(function (kk) {
            return obj[k][kk];
        }));
    }, []);

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');
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 JSON objects with sub arrays with adding objects with matching values inside the array instead of replacing

How to merge JSON objects with sub arrays with adding objects with matching values inside the array instead of replacing


By : kenod
Date : March 29 2020, 07:55 AM
it helps some times The following filter will, I believe, produce the desired result in the particular case that has been presented, but the general requirements are unclear, so it may be necessary to make adjustments accordingly:
code :
def add_merge($one; $two):
  def pairwise_add:
    transpose
    | map(if .[0].id == .[1].id then add else . end);
  reduce ($one|keys_unsorted[]) as $k ($one+$two;
     if ($one[$k]|type) == "array"
     then .[$k] = ([$one[$k], $two[$k]] | pairwise_add)
     else .
     end);
{
  "parameter1": "object1",
  "childs": [
    {
      "id": "child1",
      "parameter-A": "value-A",
      "parameter-B": "value-B"
    }
  ],
  "parameter2": "object2"
}
How to sort objects in an array inside a json or jsonb value by a property of the objects?

How to sort objects in an array inside a json or jsonb value by a property of the objects?


By : Shashank Dp
Date : March 29 2020, 07:55 AM
will help you The order of keys in an object in a jsonb literal is insignificant - object keys are sorted internally anyway. (json is different in this regard.) See:
Customize jsonb key sort order involving arrays
code :
SELECT jsonb_agg(elem)
FROM  (
   SELECT *
   FROM   jsonb_array_elements(v_combined) a(elem)
   ORDER  BY (elem->>'ts')::int  -- order by integer value of "ts"
   ) sub;
...
DECLARE
   v_combined      jsonb;
BEGIN
   SELECT INTO v_combined  jsonb_agg(elem)
   FROM  (
      SELECT ts, json_agg(data_table_1) AS j
      FROM   data_table_1
      WHERE  fk_id = v_id

      UNION ALL 
      SELECT ts, json_agg(data_table_2)
      FROM   data_table_2
      WHERE  fk_id = v_id
      ORDER  BY ts
      ) sub;
...
SELECT xmlagg(x) FROM (SELECT x FROM test ORDER BY y DESC) AS tab;
SELECT INTO v_combined  jsonb_agg(elem  ORDER BY (elem->>'ts')::int)
FROM   jsonb_array_elements(v_combined) a(elem);
Related Posts Related Posts :
  • 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
  • a sensible approach to highcharts x-axis labels
  • IDE autocompletion for javascript AMD loading style
  • Bootstrap menu disappears after first click setting the ul style to none
  • split ajax json response errors in each field
  • how to add javascript in head in cmsms
  • REGEX: Finding the correct occurrence order of some given special characters in a string
  • How do you preserve a JavaScript date's time zone from browser to server, and back?
  • Return binary result from phantomjs webserver
  • must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension.
  • Replacing a substring of an element's text with another string
  • How do I filter marks greater than or equal to 90 in this array?
  • Modify the text of my radio input button?
  • Clicking on status bar does not scroll to top of app (Trigger.io)
  • Mocha JS: How to highlight specific assertion failure?
  • $.getJSON jquery parsing to HTML
  • Find items of a certain class (a) that are also in other classes (b,c,d)
  • Setting different images for D3 force-directed layout nodes
  • Integrating Dropzone.js with angular
  • Control sprite animation speed
  • Can only one error / success function be assigned for AngularJS $http promises?
  • Working with math in javascript
  • Django variable isnt recognized by javascript
  • $.when does not work with $.scrollTo plugin
  • How to read local xml file using $.ajax?
  • Manifest is not Valid JSON. What is wrong?
  • AngularJS re-initialise JS after statechange
  • WebRupee is not working
  • How can I make the jQuery MultiSelect widget read-only?
  • How to associate javascript code with dom elements?
  • How to remove track from MediaStream and "stop" webcam?
  • clearvalidators not working in angular 6 form control
  • Remove Count Attribute in json data
  • queue up function callbacks
  • How to stop all Soundcloud streams in once?
  • Sliding div onclick left/right
  • RequireJS JQuery shim doesnt work with VS2013
  • What is the Meteor concurrency model?
  • Events on children of contenteditable element
  • Simple jquery not working to print the input value
  • Javascript templating language in reverse
  • Making Pagination in Javascript Scalable (for large # of db results)
  • Performance of Stateless Authentication in SPA and SSO (Single Sign On)
  • Assigning a value for view asynchronously
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org