CODEWITHSUNDEEP
jqueryarrays
pratik
pratik

Reputation: 4479

javascript find element from array and remove few from it

I have a javascript array like below:

var arr = [ {RoomId:1, RoomName: 'ABC'},
            {RoomId:1, RoomName: 'ABC'},
            {RoomId:1, RoomName: 'ABC'},
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
           ];

My requirement is something like

  1. Find particular room with RoomId say RoomId = 1.
  2. Remove last few elements from it like remove last 2 elements with RoomId = 1.

So my final array would be like:

var arr = [ {RoomId:1, RoomName: 'ABC'},                
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
          ];

Upvotes: 2

Views: 67

Answers (2)

Anik Islam Abhi
Anik Islam Abhi

Reputation: 25352

You can use linq.js to maintain this kind of task

Like this

Find particular room with RoomId say RoomId = 1.

Code 

var data =Enumerable.From(arr).Where(function(x){return x.RoomId===1;}).ToArray();

Remove last few elements from it like remove last 2 elements with RoomId = 1.

var data =Enumerable.From(arr).Where(function(x){return x.RoomId===1;}).OrderByDescending(function(x){return x.RoomId;}).Skip(2);

arr=data.OrderBy(function(x){return x.RoomId;}).ToArray();

Upvotes: 2

Sadikhasan
Sadikhasan

Reputation: 18600

I developed logic for your query like 

var destArr=[];
var flag=false;
var count=0;
for(i in arr)
{ 
    if(arr[i].RoomId==1 && flag==false)
    {
        flag = true;
        destArr[count++] = arr[i];              
    }
    else if(flag==true && arr[i].RoomId!=1)
    {
        destArr[count++] = arr[i];              
    }                                   
}   
console.log(destArr);

https://jsfiddle.net/oz6hw8qd/

Upvotes: 0

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