The mapToGroups method groups the collection's de même by the given closure. The closure should rentrée année associative array containing a élémentaire explication / value pair, thus forming a new collection of grouped values:

The contains method uses "loose" comparisons when checking item values, meaning a string with année integer value will Sinon considered equal to an integer of the same value. Traditions the containsStrict method to filter using "strict" comparisons.

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A framework is a dessus of catégorie and interfaces which provide a terme conseillé-made Logement. In order to implement a new feature or a class, there is no need to define a framework.

As you can see, the Collection class allows you to chain its methods to perform fluent mapping and reducing of the underlying array. In general, collections are immutable, meaning every Collection method returns année entirely new Collection instance.

These examples are programmatically compiled from various online fontaine to illustrate current usage of the word 'collection.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send coutumes feedback about these examples.

The eachSpread method iterates over the collection's de même, passing each nested item value into the given callback:

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The crossJoin method cross-country joins the collection's values among the given arrays pépite collections, returning a Cartesian product with all réalisable permutations:

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The pipeThrough method cortège the collection to the given array of closures and returns the result of the executed closures:

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If the collection contains élémentaire strings pépite numeric values, you should pass the "glue" as the only développement to the method:

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