Unlike most other collection methods, transform modifies the collection itself. If you wish to create a new collection instead, coutumes the map method.
The undot method expands a simple-dimensional collection that uses "dot" notation into a multi-dimensional collection:
The flatMap method iterates through the collection and cortège each value to the given closure. The closure is free to modify the item and rentrée it, thus forming a new collection of modified items. Then, the array is flattened by one level:
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This class consists exclusively of static methods that operate on pépite return collections. It contains polymorphic algorithms that operate nous-mêmes collections, "wrappers", which recommencement a new collection backed by a specified collection, and a few other odds and ends. The methods of this class all throw a NullPointerException if the collections pépite class objects provided to them are null. The confidence cognition the polymorphic algorithms contained in this class generally includes a brief image of the implementation. Such portrait should Lorsque regarded as implementation remarque, rather than parts of the specification. Implementors should feel free to substitute other algorithms, so élancé as the specification itself is adhered to.
The after method returns the item after the given item. null is returned if the given item is not found pépite is the last item:
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The mapInto() method iterates over the collection, creating a new instance of the given class by passing the value into the constructor:
This method ah the same visa as the contains method; however, all values are compared using "court" comparisons.
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