Laravel 5 Collections: Retrieving the Distinct Values of a Collection Using Strict Comparison Operators With uniqueStrict

The uniqueStrict method can be used to all of the unique items in the collection; it behaves similarly to the unique collection method in that it accepts an optional $key argument which can be used to restrain the conditional check when determining uniqueness.

However, unlike the unique method, the uniqueStrict method uses strict comparisons only.

#Signature

1public function uniqueStrict(
2    $key = null
3);

#Example Use

The following code examples are equivalent:

 1use Illuminate\Support\Collection;
 2 
 3// Create a new collection instance.
 4$collection = new Collection([
 5    ['id' => 5, 'name' => 'Jane',  'sex' => 'female'],
 6    ['id' => 6, 'name' => 'Bill',  'sex' => 'male'],
 7    ['id' => 7, 'name' => 'Sarah', 'sex' => 'female'],
 8    ['id' => 8, 'name' => 'Sarah', 'sex' => 'female']
 9]);
10 
11// Get all unique items using strict comparisons.
12$uniqueItems = $collection->unique('name', true);
13 
14// Get all unique items using strict comparisons.
15$uniqueItems = $collection->uniqueStrict('name');

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