logo
down
shadow

Filter collection without duplicates


Filter collection without duplicates

By : Ken Morrow
Date : November 21 2020, 01:01 AM
wish of those help I have a laravel collection like the below: , This is the best way I can think of:
code :
$awards = new \Illuminate\Database\Eloquent\Collection;
foreach($products as $product){
    $awards = $awards->merge($product->awards);
}


Share : facebook icon twitter icon
Copying a collection of objects to another collection without duplicates using aggregate operations

Copying a collection of objects to another collection without duplicates using aggregate operations


By : user2974921
Date : March 29 2020, 07:55 AM
will help you You need to implement the equals and the hashCode method in your Item class.
How to apply filter when binding with collection inside collection in wpf using collection view source

How to apply filter when binding with collection inside collection in wpf using collection view source


By : Cassem
Date : March 29 2020, 07:55 AM
like below fixes the issue You have to apply Filter two times. First for outer collection, then apply second Filter in Filter predicate of outer collection. Below code filter employees whose vehicle names start with "S", and shows Employee name and vehicle list.
DataStore contains EmployeeList, Employee contains VehicleList
code :
        private void BtnFilter_Click(object sender, RoutedEventArgs e)
        {
            var source = CollectionViewSource.GetDefaultView(Dgrd.ItemsSource);            
            source.Filter = new Predicate<object>(FilterEmployees);            

            source.Refresh();
        }

        private bool FilterEmployees(object o)
        {
            DB1.Employee e = o as DB1.Employee;

            var vehicles = CollectionViewSource.GetDefaultView(e.Vehicles);
            vehicles.Filter = new Predicate<object>(FilterVehicles);

            return (e.Vehicles.Where(v=>v.Name.StartsWith("S"))).Count() > 0;
        }

        private bool FilterVehicles(object obj)
        {
            DB1.Vehicle v = obj as DB1.Vehicle;
            return v.Name.StartsWith("S");
        }
Trying to Filter a collection using LINQ where the collection has a collection which also has a collection with a proper

Trying to Filter a collection using LINQ where the collection has a collection which also has a collection with a proper


By : ande
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Ok, this has been a pretty interesting problem for me to solve, so I will try and do my best to ask this in a way in which you can understand.
code :
collection.Where(a=>a.collectionB.Any(b=> b.collectionC == null ||
   b.collectionC.Any(c=>c.Property == null || filters.Contains(c.Property))))
filter out duplicates which actually aren't duplicates MySQL

filter out duplicates which actually aren't duplicates MySQL


By : Савелий Расстов
Date : March 29 2020, 07:55 AM
it should still fix some issue So I have a database in which I have to search for duplicate records and it's going pretty well so far. However, since the data That I currently am using to check for duplicates has quite a few records where it is a null value. Therefore it considers them duplicates of each other while they actually aren't. , Hello people I have found a working solution to my problem!
code :
column.name IS NOT NULL AND column.name != ""
column.name IS NOT NULL AND column.name != ""
Meteor: Can filter a collection by _id but I can't filter a collection using other fields

Meteor: Can filter a collection by _id but I can't filter a collection using other fields


By : Lele
Date : March 29 2020, 07:55 AM
it helps some times The only reason I could think of would be if you are not publishing ar_session_id in the client.
For instance if you had something like this:
code :
Meteor.publish("AssessmentResponse", function () {
  return AssessmentResponse.find({}, { fields: { ar_session_id: 0 } });
});
shadow
Privacy Policy - Terms - Contact Us © ourworld-yourmove.org