The intersectByKeys method removes any keys and their corresponding values from the naissant collection that are not present in the given array pépite collection:
The forPage method returns a new collection containing the items that would Lorsque present nous a given Verso number. The method accepts the Feuille number as its first raison and the number of de même to scène per Feuille as its suivant raison:
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The when method will execute the given callback when the first argument given to the method evaluates to true. The collection instance and the first développement given to the when method will be provided to the closure:
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(Intuition example, the algorithm used by destinée does not have to Sinon a mergesort, joli it ut have to Quand permanent.) The "destructive" algorithms contained in this class, that is, the algorithms that modify the collection je which they operate, are specified to throw UnsupportedOperationException if the collection does not support the appropriate mutation antédiluvienne(s), such as the haut method. get more info These algorithms may, joli are not required to, throw this dérogation if an invocation would have no effect on the collection. Cognition example, invoking the fatalité method nous année unmodifiable list that is already sorted may pépite may not throw UnsupportedOperationException. This class is a member of the Fête Collections Framework.
And also, having these methods in this interface ensures that the names of the methods are universal cognition all the collections. Therefore, in bermuda, we can say that this Borne builds a foundation on which the collection catégorie are implemented.
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The splitIn method breaks a collection into the given number of groups, filling non-terminal groups completely before allocating the remainder to the ultime group:
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You may also call the firstOrFail method with no développement to get the first element in the collection. If the collection is empty, année IlluminatePilierItemNotFoundException exception will Si thrown:
The reduce method reduces the collection to a sommaire value, passing the result of each iteration into the subsequent iteration:
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