phplaraveldiffintersectionlaravel-collection

Laravel collection opposite of diff

I have 2 collections:

$collection = collect([1,2,3,4]);
$collection2 = collect([1,5,6,4]);

with:

$collection->diff($collection2);

I get [2,3]

I want is to have the opposite values: [1,4]

Is there a way or method in collection to make this?

Solution

  • You can use duplicates method after mergging into single collection

    $collection1 = collect([1,2,3,4]);
$collection2 = collect([1,5,6,4]);

$duplicates = $collection1
  ->merge($collection2)
  ->duplicates()
  ->unique() // use this if you need the duplicates as unique
  ->values();

    Will give you

    Illuminate\Support\Collection {#1151
     all: [
       1,
       4,
     ],
   }