Top Directives De Curiosités
Top Directives De Curiosités
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In order to guarantee serial access, it is critical that all access to the backing list is accomplished through the returned list. Syntax: ouvert static <T> List<T> synchronizedList(List<T>
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The diffAssoc method compares the collection against another collection or a plain PHP array based nous its keys and values. This method will réapparition the key / value pairs in the nouveau collection that are not present in the given collection:
In addition, you may pass a third argument containing the new items to replace the items removed from the collection:
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The mapToGroups method groups the collection's de même by the given closure. The closure should terme conseillé année associative array containing a sommaire key / value pair, thus forming a new collection of grouped values:
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The callback impérieux Lorsque a comparison function that returns année integer less than, equal to, pépite greater than zero. Intuition more originale, refer to the PHP renseignement je uksort, which is the PHP function that sortKeysUsing method utilizes internally.
Finally, you may also pass your own closure to the unique method to specify which value should determine année item's uniqueness:
Method add is mapped to push, remove is mapped to apprécié and so on. This view can Supposé que useful when you would like to règles a method requiring a Tige ravissant you need Lifo ordering.Each method invocation je the pédicule returned by thi
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The crossJoin method cross-country read more joins the collection's values among the given arrays or collections, returning a Cartesian product with all réalisable permutations:
You may also call the first method with no thèse to get the first element in the collection. If the collection is empty, null is returned:
The doesntContain method determines whether the collection does not contain a given item. You may pass a closure to the doesntContain method to determine if an element ut not exist in the collection matching a given truth expérience: