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  2. Java ConcurrentMap - Wikipedia

    en.wikipedia.org/wiki/Java_ConcurrentMap

    For unordered access as defined in the java.util.Map interface, the java.util.concurrent.ConcurrentHashMap implements java.util.concurrent.ConcurrentMap. [2] The mechanism is a hash access to a hash table with lists of entries, each entry holding a key, a value, the hash, and a next reference.

  3. Hash table - Wikipedia

    en.wikipedia.org/wiki/Hash_table

    Java programming language includes the HashSet, HashMap, LinkedHashSet, and LinkedHashMap generic collections. [54] Python's built-in dict implements a hash table in the form of a type. [55] Ruby's built-in Hash uses the open addressing model from Ruby 2.4 onwards. [56] Rust programming language includes HashMap, HashSet as part of the Rust ...

  4. Java collections framework - Wikipedia

    en.wikipedia.org/wiki/Java_collections_framework

    java.util.Collection class and interface hierarchy Java's java.util.Map class and interface hierarchy. The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures. [1] Although referred to as a framework, it works in a manner of a library. The collections framework provides both ...

  5. Comparison of programming languages (associative array)

    en.wikipedia.org/wiki/Comparison_of_programming...

    The hash function in Java, used by HashMap and HashSet, is provided by the Object.hashCode() method. Since every class in Java inherits from Object , every object has a hash function. A class can override the default implementation of hashCode() to provide a custom hash function more in accordance with the properties of the object.

  6. Lazy initialization - Wikipedia

    en.wikipedia.org/wiki/Lazy_initialization

    The following is an example of a class with lazy initialization implemented in ActionScript: ... import java.util.HashMap; import java.util.Map; ...

  7. Associative array - Wikipedia

    en.wikipedia.org/wiki/Associative_array

    Because they are in order, tree-based maps can also satisfy range queries (find all values between two bounds) whereas a hashmap can only find exact values. However, hash tables have a much better average-case time complexity than self-balancing binary search trees of O(1), and their worst-case performance is highly unlikely when a good hash ...

  8. 15 over-the-top examples of wealth and luxury I saw on my ...

    www.aol.com/news/15-over-top-examples-wealth...

    For example, there was an indoor pool and a secret bedroom built for the first owner's mistress. In the most expensive home I toured, I spotted an oxygen system to help combat altitude sickness.

  9. Mediator pattern - Wikipedia

    en.wikipedia.org/wiki/Mediator_pattern

    In the following example, a Mediator object controls the values of several Storage objects, forcing the user code to access the stored values through the mediator. When a storage object wants to emit an event indicating that its value has changed, it also goes back to the mediator object (via the method notifyObservers ) that controls the list ...