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Compare two arrays for similar values javascript

I have two arrays, one I am getting from form request and the other I am getting from a mongoDb query. I want to look for all the items passed in request parameters inside the result obtained in mongodb array.
var userIdArr = ["6fbeb3e28de42200e7e7d36", "56fbde9be618221c1d67f01"];
var mongoDbResultsArr= [
{"_id": "56fce5bf7031bd482abdfb8a",
"userIds": "[56fbeb3e28de42200e7e7d36, 56fbde9be618221c1d67f010]"
},
{"_id": "56fd2c22ea0f3664156685ac",
"userIds": "[56fbeb3e28de42200e7e7d36, 56fbde9be618221c1d67f010, 56f53491886e496e32c68b00]"
}
]
Basically I want to search if the values given in userIdArr exists in the 'userIds' key of mongoDbResultsArr. Also if this can be done by writing just mongodb query, or any other better way.
This is how my schema looks like
{
"_id" : ObjectId("56fd2c22ea0f3664156685ac"),
"startDateTime" : ISODate("2016-03-31T08:34:59.000Z"),
"endDateTime" : ISODate("2016-03-31T08:34:59.000Z"),
"productId" : "#789990#2",
"applicableThemes" : [
"red"
],
"userIds" : "[56fbeb3e28de42200e7e7d36, 56fbde9be618221c1d67f010, 56f53491886e496e32c68b00]",
"price" : 45,
"dealType" : 1,
"photos" : {
"dealimageUrl3" : "http://mailers.shopping.indiatimes.com/shopstatic/shopping/images/diwali2013/banner.jpg",
"dealimageUrl2" : "http://mailers.shopping.indiatimes.com/shopstatic/shopping/images/diwali2013/banner.jpg",
"dealimageUrl1" : "http://mailers.shopping.indiatimes.com/shopstatic/shopping/images/diwali2013/banner.jpg"
},
"dealDescription" : "Bang Bang deal!!",
"dealName" : "Christmas Special Offer",
"storeId" : "56f5339fe99b1a294818ecbe",
"__v" : 0
}
and I am using mongoose ORM.

Get nested object - but identifier is part of needed object

How do I get a nested object from a selected document?
If this is my document, which I get with Collection.findOne({ _id: 'dZXr2Pg7Ak4M5aYWF'})...
{
"_id" : "dZXr2Pg7Ak4M5aYWF",
"points" : [
{
"id" : "Gwf5BzorXyYBZSEzK",
"coordinates" : [
433,
215
],
"content" : "anything"
},
{
"id" : "iwSM98W5PD87BtcLa",
"coordinates" : [
666,
186
]
}
]
}
... I need to get the complete data of the point with the id Gwf5BzorXyYBZSEzK. So my result should look like:
result = {
"id" : "Gwf5BzorXyYBZSEzK",
"coordinates" : [
433,
215
],
"content" : "anything"
}

You can simply filter the points array, with Array.prototype.filter, like this
console.log(data.points.filter(function(obj) {
return obj.id === "Gwf5BzorXyYBZSEzK";
})[0]);
// { id: 'Gwf5BzorXyYBZSEzK' coordinates: [ 433, 215 ], content: 'anything' }
We just take the first element from the filtered result array. If you want to get all the elements, which have the specific id, then just remove the subscript.
If your environment supports ECMAScript 2015's Arrow functions, then you can write the same as
console.log(data.points.filter((obj) => obj.id === "Gwf5BzorXyYBZSEzK")[0]);

var data = {
"_id": "dZXr2Pg7Ak4M5aYWF",
"points": [{
"id": "Gwf5BzorXyYBZSEzK",
"coordinates": [433, 215],
"content": "anything"
}, {
"id": "iwSM98W5PD87BtcLa",
"coordinates": [666, 186]
}]
};
function finder(id){
for(i=0;i<data.points.length;i++){
if(data.points[i].id==id){
return data.points[i];
}
}
}
var result = finder("Gwf5BzorXyYBZSEzK");
document.write(JSON.stringify(result));

Javascript, deep extend

So I have an object I'm trynig to deep extend into - right now the extend function works if the lowest level is just an array, So it looks like this :
function(base, next) {
var dataEntry = base.filter(function(it) {
return it.module === next.module;
})[0];
if (dataEntry) {
var diff = next.customUrl.filter(function(it) {
return dataEntry.customUrl.indexOf(it) === -1;
});
dataEntry.customUrl = dataEntry.customUrl.concat(diff).sort();
//_.extend(dataEntry, next);
} else {
base.push(next);
}
}
And this works if the object looks like :
[
{"name" : "one", "test" : ["1","2"]},
{"name" : "two", "test" : ["1","2"]}
]
However some things had to change and now the object looks like this :
[
{"name" : "one", "test" : [{"random1" : true},{"random2" : false}] },
{"name" : "two", "test" : [{"random3" : true},{"random4" : false}]}
]
Where the keys in the array is now an array of objects, and the objects keys are random. So If there was an object with the same key - replace the value (unless its the same, otherwise push a new object inside of there.
So for that object above I would pass this to merge into it for example:
{"name" : "one", "test" : [{"random2" : true}]}
So that would change the value of random2 to true, or something like this
{"name" : "one", "test" : [{"random18" : true}] }
where that would push in random 18 like so :
[
{"name" : "one", "test" : [{"random1" : true},{"random2" : false},{"random18" : true}] },
{"name" : "two", "test" : [{"random3" : true},{"random4" : false}]}
]
Unsure how to traverse deeper and merge. Thanks for reading!!
Edit : first stab at it -
function(base, next) {
var dataEntry = base.filter(function(it) {
return it.module === next.module;
})[0];
if (dataEntry) {
var allTags = [];
allTags.push.apply(allTags, dataEntry.customUrl);
allTags.push.apply(allTags, next.customUrl);
dataEntry.customUrl = allTags;
} else {
base.push(next);
}
}
Does not work because it does not cover over objects if they are the same, just pushes into array.

http://jsfiddle.net/p08ayvv8/
this fiddle shows you how jQuery can deal with (deep) extending objects.
See http://api.jquery.com/jquery.extend/ for a detailed explaination.
It is mentionable though that when preforming the second extension jQuery will prepend the old value of test to the array, thats why I added
o1.test = o1.test[0];

How to alert a value in a json array?

I have a json array and I need to alert a value in it.
The object looks like this:
Test = [
{
"adj" : [
{
"nodeTo" : "x",
"nodeFrom" : y,
"data":
{
"$type" : "line",
"$color" : "#A989BC",
"$value" : "number"
}
}
],
"id" : "id1",
"name" : "name1"
},
{
"adj" : [ ..... ] // I have many element in the Test array
What I want is to alert the value existed in the "data" array which exists in the "adj" array.
I tried this:
alert(Test[0]["adj"]["data"]["value"]);
But it isn't working.
Thanks in advance:)

adj is an array:
alert(Test[0]["adj"][0]["data"]["value"]);

Try this piece of code
alert(Test[0]["adj"][0]["data"]["value"]);

alert(Test[0]["adj"][0]["data"]["value"]);

There is an object after adj, so you need to add a [0]
alert(Test[0]["adj"][0]["data"]["value"]);

Ordering JSON Objects using jQuery

I have the following JSON Object being loaded into my application and stored into a var called obj:
{
"items" : [
{
"name" : "item-1",
"group" : [
{
"groupName" : "name-1",
"groupPosition" : 2
},
{
"groupName" : "name-2",
"groupPosition" : 1
}]
},
{
"name" : "item-2",
"group" : [
{
"groupName" : "name-1",
"groupPosition" : 1
},
{
"groupName" : "name-2",
"groupPosition" : 2
}]
}]
}
I then do the following to go through it:
var groups = new Array();
var items = new Array();
$.each(obj.items, function(i,r){
var itemName = r.name;
$.each(r.group, function(index, record){
if ($.inArray(record.groupName) == -1) {
groups.push(record.groupName);
$('body').append('<div id="record.groupName"></div>');
}
$('#'+record.groupName).append('<div id="itemName">itemName</div>');
// At this point I'm stuck as the items get added in order of iteration,
// not according to their record.groupPosition value.
});
});
There will eventually be several hundred "items" each contained within an unset number of "groups".
The trouble I'm having is how to iterate through the JSON object using jQuery or good ol'JavaScript and display the items in the correct position within each group as the items and groups won't be listed inside the JSON object in sequential order.
Any help would be greatly appreciated!
Thank you.

Why not just give the group items the position index like this:
{
"items" : [
{
"name" : "item-1",
"group" : {
2:{
"groupName" : "name-1",
"groupPosition" : 2
},
1:{
"groupName" : "name-2",
"groupPosition" : 1
}}
},
{
"name" : "item-2",
"group" : {
1:{
"groupName" : "name-1",
"groupPosition" : 1
},
2:{
"groupName" : "name-2",
"groupPosition" : 2
}}
}]
}

Assuming you have a variable which is assigned to this:
var data = ...
you could use the $.each() method:
$.each(data.items, function(index, item) {
// here item.name will contain the name
// and if you wanted to fetch the groups you could loop through them as well:
$.each(item.group, function(i, group) {
// here you can use group.groupName and group.groupPosition
});
});
Arrays ([]) in javascript are 0 index based and preserve their order when you are iterating over them.

If I understood correctly your problem it is not about the sorting it self but how to link them to your dom nodes, solution: use classes with numbers.
For example:
$(".group"+items[1].group[0].grouposition").append(items[1].group[0].name);
// this will give append to the element with class="group1"
If you join this with having the html structure that is being generated to match the same names, then it won't be a problem and you don't have to sort them